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class 720 qou miniature circuit breakers and switches unit mount (cable-in/cable-out) contents description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2 accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 12 ul requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 17 circuit breaker tripping characteristics (trip curves) . . . . . . . . . . . page 19 dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 28 qyu one-pole 277 vac supplementary protectors. . . . . . . . . . . . . page 30 catalog september 2005
2 ? 2005 schneider electric all rights reserved 09/2005 qou miniature cir cuit breakers and switches application information application information qou miniature circuit breaker types miniature molded case circuit breakers are intended for use in residential and commercial applications. they are tested and listed according to ul standard 489 and csa standard c22.2 no. 5-02 for molded case circuit breakers and enclosures. qou miniature circuit breakers are unit-mount (lug /lug) thermal-magnetic circuit breakers which: ? provide a means to manually open a circuit. ? automatically open a circuit under overload or short circuit conditions. ? feature common tripping of all poles. ? have a visi-trip ? trip indicator. ? can be flush-, surface-, or din rail-mounted. ? has lugs at both ends (cable-in/cable-out construction) ? operate in any position. ? are fully tested, ul listed, and csa certified fo r reverse connection without restrictive line/load markings. non-automatic switches qou non-automatic switches are intended for use as disconnect devices only. ul standard 489 requires switches to be protected by a thermal-magnetic circuit br eaker (or fuse) of equivalent rating. qou switches are ul listed for use on circuits capable of delivering not more than 10,000 amperes when protected by an equivalent rated circuit brea ker or fuse. qou switches contain no automatic tripping mechanisms and do not pr ovide overcurrent protection. description qou miniature circuit breakers and switches are av ailable for surface-, flush-, or din rail mounted applications in one-, two-, and three-pole construc tions. qou miniature circuit breakers are used for overcurrent protection and switching on both ac and dc electrical systems. qou circuit breakers and switches measure 0.75 in. (19 mm) wide per pole . two- and three-pole ci rcuit breakers are both equipped with an internal crossbar for common trippi ng of all poles. qou switches are available in one-pole, 60 ampere and two- and three- pole, 60, 100 and 125 ampere construction. cases for qou miniature circuit breakers and switches are constructed of a glass-reinforced insulating material that provides high dielectric strength. current carrying components are isolated from the handle. the handle position indicates whether the circuit breaker is off, on or tripped. applications one-pole qou miniature circuit breakers rated 1 20/240 vac are ul listed for use on 120/240 vac single-phase, three-wire or 208y/120 vac three- phase, four-wire electrical systems. two-pole qou circuit breakers rated 120/240 vac are ul listed for use on 120/240 vac single-phase, three-wire or 208y/120 vac three-phase, four-wir e electrical systems. they cannot be used on 240 vac delta systems. use qou-h two-pole circuit breakers rated 240 vac on 240 vac delta and 240 vac single-phase, two wire systems. three-pole qou circuit breakers rated 240 vac are ul listed for use on any system where the maximum phase-to-phase or phase-to-ground vo ltage is 240 vac or less. for application informatio n on other systems, contact your local field office
qou miniature circuit breakers and switches application information 3 09/2005 ? 2005 schneider electric a ll rights reserved tripping mechanisms a tripping mechanism is an assembly within the circ uit breaker molded case that causes the circuit breaker to open automatically under sustained overload or short circuit conditions. the tripping mechanisms in two- and three-pole circuit breakers operate such that an overcurrent on any pole of the circuit breaker will cause all pole s of the circuit breaker to open simultaneously. thermal and magnetic factory calib ration (with current) is performed on each pole of every square d circuit breaker. these mechanisms operate to trip the circuit breaker: ? thermal trip ? magnetic trip ? optional shunt trip accessory (see accessories, page 12) the sensing system is an integral part of a t hermal-magnetic circuit breaker. the sensing system continually monitors current flowing through the circ uit breaker. it detects abnormal current conditions and, depending on the magnitude of the current, initia tes an inverse-time or an instantaneous tripping response. this action causes the tripping mechanism to open the circuit breaker contacts and interrupt current flow. the speed of the tripping process mu st be controllable and inversely matched to the severity of the overcurrent. qou miniature circuit breakers have an over-center toggle mechanism for quick-make, quick-break action with positive handl e indication. the handle assumes a position between on (i) and off (o) when the circuit breaker has tripped. table 1: selection data catalog number rating one-pole two-pole three-pole terminal lug wire size (awg) 120/240 vac 120/240 vac 240 vac 120/240 vac 240 vac 10k air 22k air 10 k air 22k air 10k air 10 a 15 a 15 a 20a 20 a 25 a 30 a 35 a 40 a 45 a 50 a 60 a QOU110 qou115* qou115hm* ? qou120* qou120hm* ? qou125* qou130* qou135* qou140* qou145* qou150* qou160* ? qou115vh ? qou120vh ? qou125vh qou130vh qou135vh qou140vh qou145vh qou150vh qou160vh qou210 qou215* ? qou220* ? qou225* qou230* qou235* qou240* qou245* qou250* qou260* ? qou215h* ? qou220h* ? qou225h* qou230h* ? ? ? ? ? qou215vh qou220vh qou225vh qou230vh qou235vh qou240vh qou245vh qou250vh qou260vh qou310 qou315* ? qou320* ? qou325* qou330* qou335* qou340* qou345* qou350* qou360* 1?#14?#2 cu or al 70 a 80 a 90 a 100 a 125 a qou170* qou180 ? qou190 ? QOU1100 ? ? ? ? ? ? ? qou270* qou280 ? qou290 ? qou2100 ? qou2125 ? ? ? ? ? ? ? ? ? ? ? qou370 ? qou380 ? qou390 ? qou3100 ? ? 1?#12?#2/0 cu or al switch?60 amperes max.?240 vac switch?100 amperes max.?240 vac switch?125 amperes max.?240 vac qou200 qou300 1?#14?#2 qou2000 ? qou20001 ? qou3000 ? qou30001 ? 1?#12?#2/0 * ul listed as hacr type for use with heating, air conditioning a nd refrigeration equipment containing motor-group combinations and marked for use with hacr type circuit breakers. ? high-magnetic trip circuit breakers. recommended for applications where high initial inrush current can occur and for individu al dimmer applications. ? available as series 1 with forward box lugs only. (no optional terminations)
4 ? 2005 schneider electric all rights reserved 09/2005 qou miniature cir cuit breakers and switches application information thermal trip the thermal trip element of a circ uit breaker is a root-mean-squared (rms) current sensing device. the thermal element, or bimetal, is constructed from metals with dissimilar rates of expansion bonded together. the thermal element responds to overload s by reacting to the heat generated both by the current flowing through the circuit breaker and by the heat contribution from ambient conditions. the bending force of the bimetal causes the circuit br eaker to trip (see figure 1). the deflection of the bimetal is predictable as a function of current and time . this is the inverse time tripping characteristic of the thermal element, i.e., the tripping time decr eases as the magnitude of the current increases. square d calibrates the thermal elements and they ar e not field-adjustable. t he thermal trip elements are calibrated for 40 c (104 f) ambient temperat ure, per ul standard 489 and csa standard c22.2 no. 5-02. magnetic trip the magnetic (instantaneous) trip el ement uses an electromagnetic assemb ly to trip the circuit breaker instantaneously (with no intentional delay) at or above a predetermined current value. during a short circuit of sufficient magnitude, th e high-level current passing through the conductor rapidly increases the magnetic field of the electromagnet that attracts the armature. as the armature is drawn toward the electromagnet, it initiates an unlatching action and opens the circuit breaker contact (see figure 2). trip indicator when the qou miniature circuit breaker is tripped, the handle assumes a position between on (i) and off (o) and the red visi-trip ? indicator (a) appears in a window in the circuit breaker case. reset the circuit breaker and visi-trip indicator by pushing the handle to off and then to on. figure 1: thermal tripping figure 2: magnetic tripping 07203042 normal conditions thermal trip latch current out current in spring circuit breaker contacts bimetal 07203043 normal conditions normal conditions latch current out current in spring circuit breaker contacts armature electromagnet conductor
qou miniature circuit breakers and switches application information 5 09/2005 ? 2005 schneider electric a ll rights reserved line and load connections qou miniature circuit breakers are supplied with two types of lug configurati on as standard, depending on the continuous current rating: ? 10?70 ampere one- and two-pole; reversible lugs ? 10?60 ampere three-pole; reversible lugs ? other ampere ratings; forward lugs only the box-type lugs supplied on qou miniature circ uit breakers are ul listed and csa certified to accept solid or stranded, aluminum or copper conduc tors these lugs are ul listed to be used with wire rated at 140 f, 167 f and 194 f (60 c, 75 c and 90 c), sized according to the nec 176 f (75 c) temperature rating. see the accessories section for more information on terminations. optional terminations, such as quick connectors, ar e also available. see the accessories section for more information on terminations. ring-tongue terminals can be factory ordered us ing the following catalog number designations: ? qou_ _ _3100 (ring-tongue terminal wired from front) ? qour_ _ _5283 (ring-tongue terminal wired from rear) mounting provisions qou miniature circuit breakers are supplied with mounting brackets for both line and load side support. mounting brackets are field installable and can be attached to the front or back of the circuit breaker molded case. see the accessories sectio n for more information on mounting brackets. tapped mounting feet can be ordered using the catalog number designation qou_ _ _3100. all qou miniature circuit breakers also come equi pped with slots in the molded case for din rail mounting. these miniature circuit breakers are designed for use with a standard 35 mm din mounting rail (din/eu 50 022, 0.30 x 1.38 in. [7.5 mm x 35 mm]). standards square d brand qou miniature ci rcuit breakers are manufactured and tested according to the following standards: ? ul standard 489 (file e84967) ? nema standard ab1 ? canadian standards association csa c22.2 no. 5-02 ? iec 60947-2 ? ce square d brand qou non-automatic switches comply with: ? ul standard 489 ? canadian standards association csa c22.2 no. 5-02 note: circuit breakers are to be applied by guidelines detailed in the nec and other applicable electrical codes.
6 ? 2005 schneider electric all rights reserved 09/2005 qou miniature cir cuit breakers and switches application information catalog numbers square d brand circuit breakers are ordered by a ca talog number that includes the circuit breaker family, description, number of poles, amperage rating and suffix. ratings for qou miniature circuit breakers when designing an el ectrical distribution system, overcurrent pr otective devices are generally selected based on performance requirements. factors influencing this selection include system voltage, continuous current, interrupting rating and frequency. qou circuit breakers are selected by their ratings. a circuit breaker?s rating must meet or exceed the parameters of the el ectrical system on wh ich they are used. voltage rating a circuit breaker can be rated for alternating current (ac) or direct current (dc) or both. the established voltage rating of a circuit breaker is based on desi gn parameters such as clearance of current carrying parts and dielectric withstand tests both through ai r and over surfaces. voltage ratings indicate the maximum voltage for the electr ical system on which the circ uit breaker can be applied. the circuit breaker must have a voltage rating gr eater than or equal to the system voltage. when a circuit breaker clears an overcurrent, it does so in two steps: first, the current sensing system identifies the overcurrent and releases the tripping mechanism. this results in a parting of the contacts. then the circuit breaker must extinguish the voltage arc across the contacts. if the circuit breaker has the correct voltage rating, it can effici ently extinguish this vo ltage arc. qou miniature circuit breakers are rated in the following ul 489 voltages, as shown in table 3: ? 120/240 vac ? 240 vac ? 48 vdc ? 60 vdc ? 277 vac for qyu, ul 1077 recognized supplementary protector only (not a branch circuit breaker) table 2: catalog numbers typical catalog number: qo u 2 30 h 2100 qo miniature circuit breaker family description u ? unit mounted (lugs on both ends) no. of poles 1 ? 1-pole 2 ? 2-pole 3 ? 3-pole ampere rating 10?125 ampere rating 00 = 60 a, 000 = 100 a, and 0001 - 125 a qou switch rating 1- and 2-pole 2-pole 3-pole no letter-standard 120/240 vac rating vh - 22,000 air no letter - 240 vac rating vh - 22,000 air h-240 vac rating vh - 22,000 air suffix xxx (i.e., 2100) - indicates factory-installed accessory (see page 12)
qou miniature circuit breakers and switches application information 7 09/2005 ? 2005 schneider electric a ll rights reserved interrupting rating the interrupting rating of a circuit breaker is the hi ghest current at rated voltage that the circuit breaker is intended to interrupt under standard test co nditions. circuit breakers must be chosen with interrupting ratings equal to or greater than the ma ximum available short-circuit current at the point where the circuit breaker is applied in the system (see table 3). continuous current rating the continuous current rating of a circuit breaker is defined by the national electrical manufacturers association (nema) as: ?the maximum direct current or rms current, in amperes, at rated frequency which a device or assembly will carry continuously without exceeding the specif ied limits of observable temperature rise.? sometimes referred to as the ampe re rating or handle rating of the circuit breaker, the continuous current rating relates to the system current flow under normal conditions. ul standard 489 states that circuit breakers must carry 100% of their continuous current rating indefinitely (without tripping) at 104 f (40 c) in free air. qou circuit breakers should be applied, per the nec, to carry 80% of their continuous current ra tings in the intended enclosure. the continuous current rating is indicated on the handle of each circuit breaker. see table 1. switching duty the switching duty (swd) listing applies only to 15 a and 20 a circuit breakers rated at 277 vac or less. the circuit breakers are subjected to specifie d temperature rise tests at predetermined periods during the endurance operations. table 3: interrupting rating circuit breaker type no. of poles ampere rating ul listed interrupting rating?rms sym. amperes ac volts dc volts 1 1 dc ratings do not apply to circuit breakers rated for 10 a 120/240 240 277 48 60 qou 1 10?30 na na 5 ka 10?70 10 ka na na 5 ka na 80?100 10 ka na na na 5 ka 2 10?70 10 ka na na 5 ka na 80?125 10 ka na na na 5 ka 3 10?70 na 10 ka na 5 ka na 80?100 na 10 ka na na 5 ka qou-h 2 15?30 na 10 ka na 5 ka na qou-vh 2 15?60 22 ka na na 5 ka na na = not applicable
8 ? 2005 schneider electric all rights reserved 09/2005 qou miniature cir cuit breakers and switches application information ul hacr type hacr is an acronym that designates ci rcuit breakers certified to be used on heating, air conditioning, and refrigeration loads. the 9th edition of ul48 9 eliminated special testing requirements for hacr certification, and the 2005 nec eliminated the r equirement for special hacr marking. hacr marking is no longer necessary for circuit breakers used in these applications in stat es and localities where the 2005 nec has been adopted. qou circuit breakers will continue to carry the hacr marking to meet the rquirements of previous nec sections 430 and 440 in areas where the 2005 nec has not yet been adopted. in older versions of the nec, article 430-53(c) required that each ci rcuit breaker must be of the inverse time type, and be approved for group installation. the 2005 nec eliminated the group installation clause of this article. the following qou miniature circuit breaker s will continue to carry the hacr label: ? 10?100 a, one-pole ? 10?125 a, two-pole ? 10?100 a, three-pole high magnetic qou-hm circuit breakers are recommended for area lig hting (athletic fields, parking lots, outdoor signs, etc.) when using lamps of inherent high inrush current or individual dimmer applications, or other applications where high inrush current exceeds standard tripping conditions. these circuit breakers are available in 15 a and 20 a only. qou-hm circuit breakers are manufactured with the magnetic trip point calibrated at a much higher level than standard qou circuit breakers. table 4 lists the magnetic trip levels to which high-magnetic circuit breakers are calibrated: table 4: qou-hm circuit break er magnetic trip levels qou-hm circuit breakers max. full-cycle magnetic hold level 15 a 21?35 x in 315?525 a 20 a 16?26 x in 322?537 a
qou miniature circuit breakers and switches application information 9 09/2005 ? 2005 schneider electric a ll rights reserved ambient temperature rating to meet the requirements of ul 489 and the cana dian standards association, thermal-magnetic circuit breakers are designed, built and calibrated fo r use on 50/60 hz ac systems in a 104 f (40 c) ambient temperature. time/current characteristic trip curves are drawn from actu al test data that meets ul 489 testing requirements. the ambient temperature is the temperature of the air surrounding the circuit breaker. thermal- magnetic circuit breakers are tem perature-sensitive devices, and th eir rated continuous current carrying capacity is based on a ul specified 104 f (40 c) calibration temperature. the ambient temperature can affect the perform ance characteristics of the circuit breaker. thus, when applying a circuit breaker at temperatures other than 104 f (4 0 c), it is necessary to determine the circuit breaker?s actual current carrying capacity under this co ndition. further, it may be necessary to rerate the circuit breaker to compensate for these ambient conditions. see figure 3: thermal-magnetic circuit breakers use bimetal strips that bend in response to temperature changes. current flowing through the circuit breaker creates most of the heat that causes the tripping action. the ambient temperature surrounding the circuit breaker ei ther adds to or subtracts from this available heat. conductors are sized using the ampacity rerati ng factors shown on the bottom of nec table 310-16 when designing systems for ambient temperatures other than 40 c. rerating of thermal-magnetic circuit breakers for ambient conditions square d thermal-magnetic circuit br eakers are to be applied in ambi ent temperatures within the range of 14 f to 140 f (-10 c to 60 c). use the following rerating guidelines: ? ambient temperatures between 77 f and 104 f (25 c and 40 c): ? no rerating is necessary. ? ambient temperatures between 14 f and 75 f (-10 c and 24 c): ? thermal-magnetic circuit breakers operating wit hin this ambient temperature range will carry more than their continuous current rating without tripping. conductor and equipment damage can result if they are not in the same low ambient environment as the circuit breaker. ? nuisance tripping will not be a problem. howeve r, if closer protecti on of the equipment and conductor is required, the increased current carry ing capacity of the circuit breaker at the lower ambient temperature should be taken into consideration. ? ambient temperatures between 106 f and 140 f (41 c and 60 c): ? thermal-magnetic circuit breakers operating wit hin this ambient temperature range will carry less than their continuous current rating and mu st be carefully selected to prevent nuisance tripping. to determine the continuous current carrying c apacity of a thermal-magnetic circuit breaker at an ambient temperature other than 104 f (40 c), perform the following steps: 1. choose the ambient rerating curve in figure 3 for the specific amperage rating of the circuit breaker you wish to apply. note that the curve crosses t he 104 f (40 c) ambient temperature line at the circuit breaker?s rated continuous current carrying capacity (circuit breaker handle rating on the curve). 2. follow this curve to the a ppropriate ambien t temperature. 3. read the adjusted continuous current carrying capacity at this point (on the left axis). 4. add in any other applicable factors, such as continuous loading, per the nec requirement.
qou miniature cir cuit breakers and switches application information 10 ? 2005 schneider electric all rights reserved 09/2005 for example, figure 3 shows the ambient rerating curves for qou miniature circuit breakers. what is the continuous current c apacity of a 80 a circuit breaker applied at 104 f (40 c)? a 90 a circuit breaker at 50 f (10 c)? by finding 40 c on the horizontal ax is and reading up to the 80 a curve, you find that the circuit breaker will carry 80 a, which is its rated current carrying capacity. if the circuit breaker will be used on a continuous load (defined as three hours or more), section 210-20( a) of the 2005 nec requires that loading not exceed 80% of the rating. here, 80 a x .80 = 64 a. locate 50 f (10 c) on the horizontal axis and move straight up to the 90 a curve. the circuit breaker will carry 110 a. again, if the circuit is used on a continuous load, it must be applied at 80% of its rating. in this example the equation is 110 a x .80 = 88 a. as explained in section 210-20(a) of the nec: ?where a branch circuit supplies continuous loads or any combination of continuous and noncontinuous loads, the rating of the overcurrent device shall not be less than the nonc ontinuous load plus 125 percent of the continuous load. ?exception: where the assembly, in cluding the overcurrent devices protecting the branch circuit(s), is li sted for operation at 100 percent of its rating, the ampere rating of the overcurrent device shall be permitted to be not less than the sum of the continuous load plus the noncontinuous load.? frequency rating the standard-rated frequency for circuit breakers is 60 hz, but square d circuit breakers can be applied on 50 hz systems without thermal or magnetic rerating. other frequencies can affect the thermal, magnetic and short-circuit tripping characteristics of circuit breakers. applying thermal-magnetic circuit br eakers at frequencies above 50/60 hz requires special consideration of the effects of high frequency on circuit breaker tripping characteristics. thermal and magnetic operations must be treated separately. thermal tripping performance at high frequency at frequencies below 60 hz, the thermal rerating of thermal-magnetic circuit breakers is negligible. however, at frequencies above 60 hz, thermal rerating is required. high-frequency ope ration causes abnormal heat rise in the current-carrying parts because of the skin effect. one of the most common high-frequency applications is at 400 hz. figure 4 indicates the thermal rerating multiplier to be used with each circuit breaker family when applied on 400 hz systems. when applying a 100 a qou circuit breaker on a 400 hz system, the circuit breaker?s current carrying capacity is as follows: ? non-continuous loads (less than three hours): using figure 4, the qou circuit breaker may be applied at .78 of rating, or 78 a. ? continuous loads (three hours of more ): nec article 210-20(a) requires that standard circuit breaker loading does not exceed 80% of the circuit breaker?s rating when used for contin uous loads. therefore, the current- carrying capacity of a 100 a qou circuit breaker operating under continuous load at 400 hz would be 100 a x .78 x .80 = 62 a. . figure 3: ambient rerating of qou circuit breaker 10 20 30 40 50 60 70 8 0 90 100 110 120 130 140 150 160 current carrying capacity (amperes) 100 a 90 a 8 0 a 70 a 15 a 10 a 30 a 20 a 40 a 60 a 50 a 110 a 125 a -10 (14) 0 (32) 20 (6 8 ) 40 (104) 60 (140) ambient temperature ?c (?f) 45 a 07203026 figure 4: frequency rerating of qou circuit breaker at 400 hz 100 200 3 00 0 .5 .6 .7 . 8 .9 1.0 qo, qou current ratin g in ampere s deratin g multiplier 0720 3 027
qou miniature circuit breakers and switches application information 11 09/2005 ? 2005 schneider electric a ll rights reserved interrupting rating (air) at 400 hz. at frequencies above 60 hz, the interrupting rating of thermal-magnetic circuit breakers is less than the 60 hz interrupting rating. unless specifically marked for use of 400 hz systems, the interrupting rating of square d circuit breakers is reduced to 1/10th of the 60 hz interrupting rating. magnetic tripping performance at frequencies above 60 hz more current is necessary to magnetically trip a circuit breaker than at 60 hz. fig. 3 shows the multipliers of 60 hz current t hat it takes to instantaneously trip a circuit breaker when applied at various frequencies. for example, at 60 hz, it takes 700 a or more to magnetically trip a 100 a qou circuit breaker per trip curve 730-7 ( page 26). at 400 hz, it takes 1820 a (2.6 multiplier) or more to magnetically trip the same circuit breaker. figure 5: 60 hz current multiplier 1 1.5 2 15 20 30 40 50 60 70 80 9 0 100 150 200 300 400 500 600 700 800 9 00 1000 1500 2000 3000 4000 5000 6000 7000 8000 9 000 10000 20 15 10 9 8 7 6 5 4 3 line frequency in hertz lp magnetic trip multiplier 07203028
12 ? 2005 schneider electric all rights reserved 09/2005 qou miniature cir cuit breakers and switches accessories accessories factory-installed accessories qou circuit breakers and qyu supplementary protecto rs can be supplied with electrical accessories factory-installed. available factor y-installed accessories are shown in table 5 below. each qou circuit breaker or qyu supplementary protec tor can be equipped with only one (1) factory-installed electrical accessory from the table below. these devic es cannot be added, modified or removed once assembled. all electrical accessories occupy one additional pole space, 3/4 in. (19.05 mm). the proper suffix number must be added to the circuit breaker catalog number to order an accessory. table 5: factory-ins talled accessories accessory description volts, 50/60 hz coil burden, va catalog suffix shunt trip used for tripping the circuit breaker electrically using a remote control source. includes coil clearing contact. 12 ac/dc 24 ac/dc 60 168 1042 120 vac 208 vac 240 vac 72 228 288 1021 auxiliary switch ?a? contact one contact only; opens when circ uit breaker is off or tripped; 5 a max. at 120 vac, 50/60 hz 1200 auxiliary switch ?b? contact one contact only; closed when circ uit breaker is off or tripped; 5 a max. at 120 vac, 50/60 hz 1201 alarm switch one contact only; closed when circuit breaker is tripped; open when circuit breaker is on or off; 5 a max. at 120 vac, 50/60 hz 2100 ring-tongue terminal factory-installed ring tongue terminal, 10-32 screw, for 1-, 2-, and 3-pole qou 10?60 a 5283 wire binding screw hex drive 5/32 in. wire binding screw for qou 5280 mounting foot tapped mounting foot for qou, 1- and 2-pole 10?70 a, 3-pole 10?60 a 3100 figure 6: shunt trip accessory shunt trip the shunt trip accessory is used to trip the circuit breaker from a remote location by using a trip coil energize d from a separate electrical source. when energized by a push button or other pilot device, the shunt trip causes the circuit breaker to trip. t he handle moves to the tripped position and the visi-trip indicator appears. the trip coil has a coil clearing contact to break the coil circuit when the circui t breaker trips. shunt trips operate at 75% or more of rated voltage. see the wiring diagram in figure 6. circuit breaker coil clearing switch (opens when circuit breaker is shunt tripped) shunt trip coil s shunt trip housing accessory terminals 07203036
qou miniature circuit breakers and switches accessories 13 09/2005 ? 2005 schneider electric a ll rights reserved figure 7: auxiliary switch accessory auxiliary switch the auxiliary switch accessory monitors the circuit breaker contact status and provides a remote signal indicating whether the circuit breaker contacts are open or closed. when the ci rcuit breaker is off or tripped, the auxiliary switch with an ?a? contact is open and the auxiliary switch with a ?b? contact is closed. when the circuit breaker is on, the auxiliary switch with an ?a? contact is closed and the aux iliary switch with a ?b? contact is open. see the wiring diagram in figure 7. circuit breaker on 07203037 circuit breaker off or tripped "a" contact "b" contact "a" contact "b" contact figure 8: alarm switch accessory alarm switch the alarm switch accessory monitors the circuit breaker trip status and is used to provide a remote warning signal indicating that the circuit breaker has tripped. this signal can be a horn, pilot light, or some other indicator. the contact on the standard alarm switch is open when the circuit breaker is in the off or on position and is closed when the circuit breaker is in the tripped position. alarm switches are actuated when the ci rcuit breaker has tripped as a result of an overload, short circuit or shunt trip operation. see the wiring diagram in figure 8. 07203038 norm a lly-open al a rm s witch circ u it bre a ker (tripped) circ u it bre a ker (off or on)
14 ? 2005 schneider electric all rights reserved 09/2005 qou miniature cir cuit breakers and switches accessories field-installed accessories table 6: field-insta lled accessories accessory description catalog number handle tie ties two 1-pole circuit breakers together. qo1ht ties three 1-pole circuit breakers together; includes lock-off for california title 24. qo3ht handle lock-off (clamp) clamp for holding qou single-pole handle in on or off position. qo1lo attaches to 1-, 2-, or 3-pol e circuit breaker handles. hlo1 handle padlock attachment for padlocking 1-pole circuit breaker in ?off? or ?on? posit ion. attaches to circuit br eaker escutcheon?fixed qou1pa for padlocking 2- and 3-pole circuit breaker in ?off? or ?on? position. attaches to circuit breaker escutcheon?fixed qou1pl for padlocking 1-pole circuit breaker in ?off? position only qou1pafla for padlocking 2- and 3-pole circuit breaker in ?off? posi tion only (1- and 2-pole 10?70 a, 3-pole 10?60 a) qou2pafla one-pole circuit breakers. attaches to circuit breaker handle?removable qohpl two-and 3-pole circuit breakers. attaches to circuit breaker handle?removable qo1hpl mechanical interlock interlocks two 2-pole or one 2-pole and one 1-pole qou circuit breakers qo2dtila mechanical interlock with retaining kit for interlocking two adjacent back-fed circuit breakers in dual power supply applications. interlocks two 2-pole or one 2-pole and one 1-pole qou circuit breakers. qo2dtim mounting feet for mounting 1-, 2-, or 3-pole circuit breaker s (two mounting feet required per circuit breaker) qoumf1 qoumf2 qoumf3 tapped mounting foot for qou, 1- and 2-pole 10?70 a, 3-pole 10?60 a (two mounting feet required per pole) qoumfs1 quick connectors for forward or reverse wiring of 60 a maximum circuit breakers qoufr for end connection wiring of 60 a maximum circuit breakers qouec finger safe cover for 10?70 a 1- and 2-pole 10?60 a 3-pole circuit breakers (two covers required per pole) qoulfsc1 for 80?100 a 1-, 2-, and 3-pole circuit breakers (two covers required per pole) qouhfsc1 jumper bars for 2-pole low ampere qous 4-pole jumper bar with front wiring, base, cover, and screw qou14100jbaf 4-pole jumper bar with wiring, base, cover, and screw to left qou14100jbal 4-pole jumper bar with wiring, base, cover, and screw to right qou14100jbar 4-pole, 100 a jumper bar base with front wiring qou14100bafb 4-pole, 100 a jumper bar base with left-side wiring qou14100balb 4-pole, 100 a jumper bar base with right-side wiring qou14100barb 4-pole jumper bar cover qou14100cab mounting screw for jumper bar cover qouqcmsb 6-pole jumper bar with front wiring, base, cover, and screw qou16150jbaf 6-pole, 150 a jumper bar base with front wiring qou16150bafb 6-pole, 150 a jumper bar base with left-side wiring qou16150balb 6-pole, 150 a jumper bar base with right-side wiring qou16150barb 6-pole jumper bar cover qou16150cab cover plates for one 2-pole circuit breaker qoucp2 for one 3-pole circuit breaker qoucp3 for two 2-pole circuit breakers qoucp4 for three 2-pole circuit breakers qoucp6 rainproof cover vertical cover for 2- and 3-pole circuit breakers bcv horizontal cover for 2-pole circuit breakers bch ring tongue terminal adapter for ring tongue terminal wiring of 60 a maximum circuit breakers qourt
qou miniature circuit breakers and switches accessories 15 09/2005 ? 2005 schneider electric a ll rights reserved handle tie the handle tie accessory converts any adjacent 1-pole qou circuit breaker to one independent-trip multi-pole circuit breaker. handle lock-off the handle lock-off accessor ies fasten the handle in the on or off position. the mechanism will still be able to tr ip and open the contacts even if the handle is held on. the handle lo ck-off cannot be padlocked. handle padlock attachment the handle padlock attachments allow padlocking the circuit breaker handles in the on or off position. the mechanism will still be able to trip and open the contacts even if the handle is held on. mechanical interlock attachment the mechanical interlock attachment locks the handles of two adjacent circuit breakers to prevent both circuit breakers from being on at the same time. both circuit breakers may be swit ched to the off position with the mechanical interlock in place. the mechanism will still be able to trip and open the contacts even if the handle is held on. mounting feet mounting feet are available to mount 1- , 2-, and 3-pole circuit breakers. two brackets (two kits) are required to mount each circuit breaker. tapped mounting feet tapped versions of the mounting feet are available to mount 1-, 2-, and 3- pole circuit breakers. two brackets (one kit) are required to mount each circuit breaker. jumper bars for added wiring convenience, jumper bars are available for common connections to two 2-pole or three 2-pole 60 a maximum qou circuit breakers. jumper bars are available with fr ont, left-side, or right-side wiring bases and covers. cover plates cover plates are available to fit one 2-pole, one 3-pole, two 2-pole, or three 2-pole circuit breakers. the cover plates fasten to the escutcheon and provide 1 in. (25.4 mm) per pole finish trim to co ver the circuit breaker. 0720303 9 qo1ht handle tie qo1lo handle lock-off hlo-1 handle lock-off 07203040 qou1pa padlock attachment qo1hpl padlock attachment qou1pl padlock attachment qou2dtila mechanical interlock attachment 07203041 07203044 qoumf1 mounting foot suffix -3100 or qoumfsi tapped mounting foot 0720 3 045 caution 24 0 v.ac. 10 0 a mp m a x . i n sta ll te r m ina l c o ver b e f o r e e n e r g iz in g lin e te r m in a ls . te r m in al c o v e r c a t. n o. q o u 141 0 0c a u se w ith : ju m p e r b a r a ss em b ly q o u 1 4100b a f c o v e r m ou n t i n g sc re w q o u 1c m s u se o n l y sq u a r e d s e r ie s 3 t y p e q o u 6 0 a m p m a x im u m c ir c u it b r e a k e r s. a ll c o n n e c to r s o f ju m per b a r a s se m b l y m u s t b e f i l le d w i t h c ir c u it b re ak e r s b e f o r e e n e r g i zing . j u m p e r ba r a s s ?y . m u s t b e i n st a ll e d to f it t ig ht ag a i n s t q o u c i r c u it b r e a k er . d o n o t s pr a y o r a l lo w a n y pe t r o l e u m b a se d c h em ic a ls , s o l v e n ts , o r p a in t to c o n t a c t j u m p e r ba r as s e m b l y . t e r m in a l d a ta w ire r a n g e 2 /0-3 c u / a l 4 -5 c u / a l 8 c u /a l 1 0-14 c u / a l t er m in a l l in e t er m ina l t o r q u e in - l b s 5 0 4 5 40 3 5 s e e c i r c u it b r e a k e r s fo r w i r e in s t a ll a t io n in fo r m a t io n a n d t er m in a l s c r ew to r q u e . jumper bar base jumper bar cover on off 0720 3 049 cover plate
qou miniature cir cuit breakers and switches accessories 16 ? 2005 schneider electric all rights reserved 09/2005 finger safe covers finger safe covers are installed over the top of the terminal connections to prevent accidental contact with energized parts. two covers are required per pole of each circuit breaker. rainproof covers rainproof covers plates are available for vertical mounted 2- and 3-pole circuit breakers and horizontal m ounted 2-pole circuit breakers. ring-tongue terminal adapters ring-tongue terminal adapters are available for ring tongue terminal wiring of 60 a maximum circuit breakers. reversible lugs for added wiring convenience, qour 10?70 a 1- and 2-pole, and 10?60 a 3-pole qour circuit breakers have reversible lugs. removing the wire binding screw allows the captive lug body to be rotated and the wire binding screw reinstalled. this permits the circuit breaker to be flush mounted and then conveniently wired from the back. quick connectors in addition to the reversible lugs previously described, 10?70 a 1- and 2- pole, and 10?60 a 3-pole a qou circuit breakers have optional field installable quick connectors. quick connectors provide a convenient way to attach two wires using two standard, 0.25 in. insulated quick connectors per terminal (30 a maximum per connector). quick connectors are not furnished with the circuit breakers, but are commercially available. connectors suitable for wire sizes up to awg #10 can be selected for use with these circuit breakers. 07903001 qoulfsc1 low-amp finger safe cover 07903000 qouhfsc1 high-amp finger safe cover 0720 3 050 0720 3 04 8 rainproof covers ring-tongue terminal adapter 0720 3 046 0720 3 047 forward or reverse quick connector end quick connector table 7: optional terminations type wiring method quantity catalog number field-installed quick connectors forward or reverse 1 qoufr field-installed quick connectors end connection 1 qouec factory-installed quick connectors one each end of qou for end connection ? qouq prefix available only on 10?60 ampere circuit breakers.
qou miniature circuit breakers and switches ul requirements 17 09/2005 ? 2005 schneider electric a ll rights reserved ul requirements a ul label on the qou miniature circuit breaker indicates that the circuit breaker meets the requirements of ul standard 489 for molded case circuit breakers. underwriters laboratories inc. (ul), the canadian st andards association (csa), the national electrical manufacturers association (nema), and the national elec trical code (nec) all define a circuit breaker as ?a device designed to open and close a circuit by non-autom atic means and to open the circuit automatically at a predetermined overcurrent without damage to it self when properly applied within its rating.? a molded case circuit breaker is one ?that is asse mbled as an integral unit in a supportive and enclosing housing of insulated material.? a ul label also means the production procedure is monitored by ul inspectors for continuing conformance to ul performance requirements. th ese requirements are based on sound engineering principles, research, records of test and field experience, and information gathered from users and inspection authorities. ul 489 and csa 22.2 #5-02 test procedures limited available fault current tests ul and csa require a series of tests on a single se t of sample circuit breakers for compliance with ul standard 489. the tests for thermal-magnetic circui t breakers are described below and conducted in the order presented. since qou switches are der ivatives of qou miniature circuit breakers,they do not have to go through an overload test. they have to complete a withstand test (paragraph 11.1.7). 200% thermal calibration each pole of the circuit breaker must trip within a sp ecified time limit when carrying 200% of its ampere rating. 135% thermal calibration with all poles connected in series, the circuit br eaker must trip within a specified time limit when carrying 135% of its ampere rating. overload the circuit breaker is operated making and breaking 600% of its ampere rating, but not less than 150 a. for circuit breakers through 100 a, the number of 600% operations is 35 manual open and close and 15 manual close and automat ic open. for 125 a circuit breakers, the number of operations is 50 manual open and close. temperature rise while carrying 100% of rated current at a 104 f (40 c) ambient temperature and mounted in open air, the circuit breaker is checked for temperature ri se on a wiring terminal. the temperature rise must not exceed a 122 f (50 c) rise above ambient temperature and must be within specified limits. endurance the circuit breaker must successfully complete the number of switching operations shown in the table below. one switching operation includes a motion to turn the circuit breaker on and a motion to turn the circuit breaker off. table 8: qou circuit breake r switching operations amperes full load operations no load operations 0?100 a 6000 4000 125 a 4000 4000
18 ? 2005 schneider electric all rights reserved 09/2005 qou miniature cir cuit breakers and switches ul requirements calibration retest both the 200% and 135% thermal calibration tests are repeated. short circuit for circuit breakers rated 240 v, two short-circuit te sts per pole and one test with all poles connected in series are performed. for example, a three-pole circ uit breaker receives seven short-circuit tests. for circuit breakers rated 120/240 v, three tests are made with all poles connected in series. the circuit breaker is connected to the test circuit using wire co rrectly sized for the rating of the circuit breaker. the line leads are not more than 4 ft. (1.22 m) in length and the load leads are not more than 10 in. (25.4 cm) in length. note: successful testing requires that the current be interrupted while maintaining the integrity of all conductors and connections. trip out the 200% thermal calibration test is r epeated following the short-circuit tests. dielectric the circuit breaker must withst and, for one minute, twice its rated voltage plus 1000 v: ? between line and load terminals with the circuit break er open, that is, with the circuit breaker either tripped or off. ? between terminals of opposite polarity with the circuit breaker open. ? between live parts and the overall enclosure with the circuit breaker both open and closed. no conditioning of the circuit breaker can take place during or between tests. there also can be no failure of functional parts at the conclusion of the sequences. high available fault current tests after qualifying a set of circuit breakers to the standard tests, a manufacturer can have additional circuit breaker samples tested on higher than standard available fault currents. the following performance requirements apply: 200% thermal calibration each pole of the circuit breaker must trip within a specified time limit when carrying 200% of its continuous curre nt rating. short circuit with the load side terminals connected by 10 in. (25. 4 cm) lengths of specified wire, the circuit breaker is exposed to a short-circuit current. after successf ul interruption, the circuit breaker is reset and closed again on the short circuit. an additional short- circuit bus-connected test is required for frame sizes or construction groups below 100 a. trip out each pole of the circuit breaker must trip within a specified time limit when carrying 250% of its continuous curre nt rating. dielectric withstand the circuit breaker is subjected to twic e its rated voltage, but not less than 900 v.
qou miniature circuit breakers and switches circuit breaker tripping characteristics (trip curves) 19 09/2005 ? 2005 schneider electric a ll rights reserved circuit breaker tripping characteristics (trip curves) the tripping characteristics of thermal-magnetic circ uit breakers are represented by a characteristic tripping curve that plots tripping time versus cu rrent level. see page 20. the curve shows the amount of time required for a circuit breaker to trip for over current through the entire trip ping range of the circuit breaker. manufacturing tolerances result in a cu rve that is a band bound by minimum and maximum values of total clearing time. total clearing time is the sum of the sensing time, unlatching time, mechanical operating time, and arcing time of the circ uit breaker. for currents in excess of 135 percent of the circuit breaker rating at ambient temperatur e (40c/104f), the circuit breaker will automatically open the circuit within limits specified by the band. thermal tripping characteristics the upper left portion of the characteristic tripping curve displays the thermal response of the circuit breaker. on overcurrent levels, up to the instantaneous tripping level, thermal tripping occurs when the bimetal in the circuit breaker responds to the heat associated with the overcurrent. the bimetal deflects, unlatching the mechanism and mechanically causing the circuit breaker to trip and open the circuit. the larger the overcurrent, the faster the circuit breaker operates to open the circuit (inverse time). magnetic (instantaneous) tripping characteristics the lower right portion of the characteristic tr ipping curve displays the magnetic (instantaneous) tripping response of the circuit breaker. this take s place when overcurrents of sufficient magnitude operate the magnetic tripping mech anism. magnetic tripping occu rs with no intentional delay.
20 ? 2005 schneider electric all rights reserved 09/2005 qou miniature cir cuit breakers and switches tripping curves tripping curves curve 730-1 copyright ? square d company 19 87 1.5 700 150 200 300 400 600 800 900 2000 3000 4000 5000 7000 8000 9000 10000 .5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 6000 1500 1000 500 .005 .006 .007 .008 .009 .01 .015 .02 .03 .04 .05 .06 .07 .08 .09 .1 .15 .2 .3 .4 .5 .6 .7 .8 .9 1 1.5 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 15 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 6000 7000 8000 9000 5000 10000 1 .5 .6 .7 .8 .9 1.5 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 multiples of rated current time in seconds .005 .006 .007 .008 .009 .01 .015 .02 .03 .04 .05 .06 .07 .08 .09 .1 .15 .2 .3 .4 .5 .6 .7 .8 .9 1 1.5 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 150 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 5000 6000 7000 8000 9000 10000 time in seconds cycle 2 1 cycle 150 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 5000 6000 7000 8000 9000 10000 150 1 cycle 1 cycle (60 hz) (60 hz) (50 hz) (50 hz) 2 1 multiples of rated current 1,2 3 1 2 3 1 2 3 qo molded case circuit breakers characteristic trip curve no 730-1 circuit breaker information circuit breaker ampere rating maximum ac voltage of poles this curve is to be used for application and coordination purposes only. the ez-amp overlay feature at the bottom of the page should be used during coordination studies. all time/current characteristic curve data is based on 40 ? c ambient cold start. terminations are made with conductors of appropriate length and ratings. prefix continuous qo, qou qo, qou qo, qo-em qo, qo-em qo qo-k qo-swn qo-swn 10 10 10 10 10 10 10 10 120/240 240 120/240 120/240 240 120 120 120/240 number curve no.0730tc8701 drawing no. b4809 5-730-01 maximum single pole trip times at 25?c based on nema ab-2, 1980 maximum clearing time (a t 50 hz) (a t 60hz) 10
qou miniature circuit breakers and switches tripping curves 21 09/2005 ? 2005 schneider electric a ll rights reserved curve 730-2 copyright ? square d company 19 87 1.5 700 150 200 300 400 600 800 900 2000 3000 4000 5000 7000 8000 9000 10000 .5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 6000 1500 1000 500 .005 .006 .007 .008 .009 .01 .015 .02 .03 .04 .05 .06 .07 .08 .09 .1 .15 .2 .3 .4 .5 .6 .7 .8 .9 1 1.5 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 15 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 6000 7000 8000 9000 5000 10000 1 .5 .6 .7 .8 .9 1.5 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 multiples of rated current time in seconds .005 .006 .007 .008 .009 .01 .015 .02 .03 .04 .05 .06 .07 .08 .09 .1 .15 .2 .3 .4 .5 .6 .7 .8 .9 1 1.5 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 150 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 5000 6000 7000 8000 9000 10000 time in seconds cycle 2 1 cycle 150 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 5000 6000 7000 8000 9000 10000 150 1 cycle 1 cycle (60 hz) (60 hz) (50 hz) (50 hz) 2 1 multiples of rated current 1 1 qo molded case circuit breakers characteristic trip curve no 730-2 circuit breaker information circuit breaker ampere rating maximum ac voltage of poles this curve is to be used for application and coordination purposes only. the ez-amp overlay feature at the bottom of the page should be used during coordination studies. all time/current characteristic curve data is based on 40?c ambient cold start. terminations are made with conductors of appropriate length and ratings. prefix continuous qo-k qo, qou, qo-vh, qh 15 15 120 120/240 number curve no.0730tc8702 drawing no. b4809 5-730-02 maximum single pole trip times at 25?c based on nema ab-2, 1980 maximum clearing time (a t 50 hz) (a t 60hz) 15
22 ? 2005 schneider electric all rights reserved 09/2005 qou miniature cir cuit breakers and switches tripping curves curve 730-3 ? 199 5 square d 1.5 700 150 200 300 400 600 800 900 2000 3000 4000 5000 7000 8000 9000 10000 .5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 6000 1500 1000 500 .005 .006 .007 .008 .009 .01 .015 .02 .03 .04 .05 .06 .07 .08 .09 .1 .15 .2 .3 .4 .5 .6 .7 .8 .9 1 1.5 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 15 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 6000 7000 8000 9000 5000 10000 1 .5 .6 .7 .8 .9 1.5 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 multiples of rated current time in seconds .005 .006 .007 .008 .009 .01 .015 .02 .03 .04 .05 .06 .07 .08 .09 .1 .15 .2 .3 .4 .5 .6 .7 .8 .9 1 1.5 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 150 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 5000 6000 7000 8000 9000 10000 time in seconds cycle 2 1 cycle 150 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 5000 6000 7000 8000 9000 10000 150 1 cycle 1 cycle (60 hz) (60 hz) (50 hz) (50 hz) 2 1 multiples of rated current drawing no. b4809 5-730-03 1 1 1, 2 3 qo molded case circuit breakers characteristic trip curve no 730-3 circuit breaker information circuit breaker ampere rating maximum ac voltage of poles this curve is to be used for application and coordination purposes only. the ez-amp overlay feature at the bottom of the page should be used during coordination studies. all time/current characteristic curve data is based on 40?c ambient cold start. terminations are made with conductors of appropriate length and ratings. prefix continuous qo-k qo, qou, qo-vh, qh qo-pl qo-pl 20 20 20 20 120 120/240 120/240 240 number order no.0730tc8703r5/95 (replaces 0730tc8703) june, 1995 maximum single pole trip times at 25?c based on nema ab-2, 1980 maximum clearing time (a t 50 hz) (a t 60hz) 20
qou miniature circuit breakers and switches tripping curves 23 09/2005 ? 2005 schneider electric a ll rights reserved curve 730-4 1.5 700 150 200 3 00 400 600 8 00 900 2000 3 000 4000 5000 7000 8 000 9000 10000 .5 .6 .7 . 8 .9 1 2 3 4 5 6 7 8 9 10 15 20 3 0 40 50 60 70 8 0 90 100 6000 1500 1000 500 .005 .006 .007 .00 8 .009 .01 .015 .02 .0 3 .04 .05 .06 .07 .0 8 .09 .1 .15 .2 . 3 .4 .5 .6 .7 . 8 .9 1 1.5 2 3 4 5 6 7 8 9 10 20 3 0 40 50 60 70 8 0 90 100 15 200 3 00 400 500 600 700 8 00 900 1000 1500 2000 3 000 4000 6000 7000 8 000 9000 5000 10000 1 .5 .6 .7 . 8 .9 1.5 2 3 4 5 6 7 8 9 10 15 20 3 0 40 50 60 70 8 0 90 100 multiple s of rated current time in s econd s .005 .006 .007 .00 8 .009 .01 .015 .02 .0 3 .04 .05 .06 .07 .0 8 .09 .1 .15 .2 . 3 .4 .5 .6 .7 . 8 .9 1 1.5 2 3 4 5 6 7 8 9 10 15 20 3 0 40 50 60 70 8 0 90 100 150 200 3 00 400 500 600 700 8 00 900 1000 1500 2000 3 000 4000 5000 6000 7000 8 000 9000 10000 time in s econd s 1 / 2 cycle (60 hz) 1 / 2 cycle (50 hz) 150 200 3 00 400 500 600 700 8 00 900 1000 1500 2000 3 000 4000 5000 6000 7000 8 000 9000 10000 150 multiple s of rated current 1 cycle (60 hz) 1 cycle (50 hz) maximum individual pole trip time s at 25 c ba s ed on nema ab-4, 1991 25 a 20 a 15 a maximum clearing time (at 50 hz) (at 60 hz) 25 20 15 curve no. 0730tc0504 september 2005 drawing no. 48095-730-04 (replaces 0730tc8704r5/95) tm ? 2005 schneider electric all rights reserved qo ? molded case circuit breakers characteristic trip curve no. 730-4 circuit breaker information continuous maximum number circuit breaker prefix ampere ac of rating voltage poles qo-k 25 120 1 qo-h, qo-hvh 15C25 240 2 qo-hm, qo-hid, qo-em, qou-hm, qou-vh 15 & 20 120/240 1 qo, qou, qo-hid, qo-em, qo-vh, qh, qou-vh 15 & 20 120/240 2 qo, qou, qo-hid, qo-vh, qh, qou-vh 15 & 20 240 3 qo, qou, qo-hid, qo-vh, qh, qou-vh 25 120/240 1, 2 qo-em 25 120/240 2 qo, qou, qo-hid, qo-vh, qh, qou-vh 25 240 3 qo-wh 15C25 120/240 2 qo-swn 15C25 120 2 qo-swn 15C25 120/240 3 qo-pl 25 120/240 2 qo-pl 25 240 3 this curve is to be used for application and coordination purposes only. the ez-amp overlay feature at the bottom of the page should be used during coordination studies. all time/current characteristic curve data is based on 40c ambient cold start. terminations are made with conductors of appropriate length and ratings.
24 ? 2005 schneider electric all rights reserved 09/2005 qou miniature cir cuit breakers and switches tripping curves curve 730-5 1.5 700 150 200 3 00 400 600 8 00 900 2000 3 000 4000 5000 7000 8 000 9000 10000 .5 .6 .7 . 8 .9 1 2 3 4 5 6 7 8 9 10 15 20 3 0 40 50 60 70 8 0 90 100 6000 1500 1000 500 .005 .006 .007 .00 8 .009 .01 .015 .02 .0 3 .04 .05 .06 .07 .0 8 .09 .1 .15 .2 . 3 .4 .5 .6 .7 . 8 .9 1 1.5 2 3 4 5 6 7 8 9 10 20 3 0 40 50 60 70 8 0 90 100 15 200 3 00 400 500 600 700 8 00 900 1000 1500 2000 3 000 4000 6000 7000 8 000 9000 5000 10000 1 .5 .6 .7 . 8 .9 1.5 2 3 4 5 6 7 8 9 10 15 20 3 0 40 50 60 70 8 0 90 100 multiple s of rated current time in s econd s .005 .006 .007 .00 8 .009 .01 .015 .02 .0 3 .04 .05 .06 .07 .0 8 .09 .1 .15 .2 . 3 .4 .5 .6 .7 . 8 .9 1 1.5 2 3 4 5 6 7 8 9 10 15 20 3 0 40 50 60 70 8 0 90 100 150 200 3 00 400 500 600 700 8 00 900 1000 1500 2000 3 000 4000 5000 6000 7000 8 000 9000 10000 time in s econd s 1 / 2 cycle (60 hz) 1 / 2 cycle (50 hz) 150 200 3 00 400 500 600 700 8 00 900 1000 1500 2000 3 000 4000 5000 6000 7000 8 000 9000 10000 150 multiple s of rated current 1 cycle (60 hz) 1 cycle (50 hz) maximum individual pole trip time s at 25 c ba s ed on nema ab-4, 1991 40 a 3 5 a 3 0 a maximum clearing time (at 50 hz) (at 60 hz) 40 3 5 3 0 curve no. 0730tc0505 september 2005 drawing no. 48095-730-05 (replaces 0730tc0105) tm ? 2005 schneider electric all rights reserved qo ? molded case circuit breakers characteristic trip curve no. 730-5 circuit breaker information circuit breaker continuous maximum number prefix ampere rating ac voltage of poles qo-k 30 120 1 qo-vh, qh, qou-vh 30 120/240 1, 2 qo-h 30 240 2 qo-hid, qo-vh, qh, qou-vh 30 240 3 qo, qou, qo-hid, qou-vh 30C40 120/240 2 qo-pl 30C40 120/240 2 qo, qou 30C40 240 3 qo-swn 30 & 40 120 2 qo-swn 30 & 40 120/240 3 qou-vh 35C40 120/240 1 this curve is to be used for application and coordination purposes only. the ez-amp overlay feature at the bottom of the page should be used during coordination studies. all time/current characteristic curve data is based on 40c ambient cold start. terminations are made with conductors of appropriate length and ratings.
qou miniature circuit breakers and switches tripping curves 25 09/2005 ? 2005 schneider electric a ll rights reserved curve 730-6 ? 199 5 square d 1.5 700 150 200 300 400 600 800 900 2000 3000 4000 5000 7000 8000 9000 10000 .5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 6000 1500 1000 500 .005 .006 .007 .008 .009 .01 .015 .02 .03 .04 .05 .06 .07 .08 .09 .1 .15 .2 .3 .4 .5 .6 .7 .8 .9 1 1.5 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 15 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 6000 7000 8000 9000 5000 10000 1 .5 .6 .7 .8 .9 1.5 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 multiples of rated current time in seconds .005 .006 .007 .008 .009 .01 .015 .02 .03 .04 .05 .06 .07 .08 .09 .1 .15 .2 .3 .4 .5 .6 .7 .8 .9 1 1.5 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 150 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 5000 6000 7000 8000 9000 10000 time in seconds cycle 2 1 cycle 150 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 5000 6000 7000 8000 9000 10000 150 1 cycle 1 cycle (60 hz) (60 hz) (50 hz) (50 hz) 2 1 multiples of rated current drawing no. b4809 5-730-06 1, 2 2 1, 2 3 3 2 3 2 3 qo molded case circuit breakers characteristic trip curve no 730-6 circuit breaker information circuit breaker ampere rating maximum ac voltage of poles this curve is to be used for application and coordination purposes only. the ez-amp overlay feature at the bottom of the page should be used during coordination studies. all time/current characteristic curve data is based on 40?c ambient cold start. terminations are made with conductors of appropriate length and ratings. prefix continuous qo-hid qo-em qo, qou qo qou qo-swn qo-swn qo-pl qo-pl 50 50-60 50-70 50-70 50 50 50 40-60 40-60 120/240 120/240 120/240 240 240 120 120/240 120/240 240 number order no.0730tc8706r5/95 (replaces 730-6 dated 5/87) june, 1995 maximum single pole trip times at 25?c based on nema ab-2, 1980 maximum clearing time (a t 50 hz) (a t 60hz) 70 60 50 70 a . 60 a . 50 a .
26 ? 2005 schneider electric all rights reserved 09/2005 qou miniature cir cuit breakers and switches tripping curves curve 730-7 copyright ? square d company 19 87 1.5 700 150 200 300 400 600 800 900 2000 3000 4000 5000 7000 8000 9000 10000 .5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 6000 1500 1000 500 .005 .006 .007 .008 .009 .01 .015 .02 .03 .04 .05 .06 .07 .08 .09 .1 .15 .2 .3 .4 .5 .6 .7 .8 .9 1 1.5 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 15 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 6000 7000 8000 9000 5000 10000 1 .5 .6 .7 .8 .9 1.5 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 multiples of rated current time in seconds .005 .006 .007 .008 .009 .01 .015 .02 .03 .04 .05 .06 .07 .08 .09 .1 .15 .2 .3 .4 .5 .6 .7 .8 .9 1 1.5 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 150 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 5000 6000 7000 8000 9000 10000 time in seconds cycle 2 1 cycle 150 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 5000 6000 7000 8000 9000 10000 150 1 cycle 1 cycle (60 hz) (60 hz) (50 hz) (50 hz) 2 1 multiples of rated current 2 3 qo molded case circuit breakers characteristic trip curve no 730-7 circuit breaker information circuit breaker ampere rating maximum ac voltage of poles this curve is to be used for application and coordination purposes only. the ez-amp overlay feature at the bottom of the page should be used during coordination studies. all time/current characteristic curve data is based on 40?c ambient cold start. terminations are made with conductors of appropriate length and ratings. prefix continuous qo, qou qo, qou 80-100 80-100 120/240 240 number curve no. 730-7 5-87 replaces curve no. 730-7 dated 5/85 maximum single pole trip times at 25?c based on nema ab-2, 1980 maximum clearing time (a t 50 hz) (a t 60hz) 100 90 80 100 a . 90 a . 80 a .
qou miniature circuit breakers and switches tripping curves 27 09/2005 ? 2005 schneider electric a ll rights reserved curve 730-9 copyright ? square d company 19 87 1.5 700 150 200 300 400 600 800 900 2000 3000 4000 5000 7000 8000 9000 10000 .5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 6000 1500 1000 500 .005 .006 .007 .008 .009 .01 .015 .02 .03 .04 .05 .06 .07 .08 .09 .1 .15 .2 .3 .4 .5 .6 .7 .8 .9 1 1.5 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 15 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 6000 7000 8000 9000 5000 10000 1 .5 .6 .7 .8 .9 1.5 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 multiples of rated current time in seconds .005 .006 .007 .008 .009 .01 .015 .02 .03 .04 .05 .06 .07 .08 .09 .1 .15 .2 .3 .4 .5 .6 .7 .8 .9 1 1.5 2 3 4 5 6 7 8 9 10 15 20 30 40 50 60 70 80 90 100 150 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 5000 6000 7000 8000 9000 10000 time in seconds cycle 2 1 cycle 150 200 300 400 500 600 700 800 900 1000 1500 2000 3000 4000 5000 6000 7000 8000 9000 10000 150 1 cycle 1 cycle (60 hz) (60 hz) (50 hz) (50 hz) 2 1 multiples of rated current 2 qo molded case circuit breakers characteristic trip curve no 730-9 circuit breaker information circuit breaker ampere rating maximum ac voltage of poles this curve is to be used for application and coordination purposes only. the ez-amp overlay feature at the bottom of the page should be used during coordination studies. all time/current characteristic curve data is based on 40?c ambient cold start. terminations are made with conductors of appropriate length and ratings. prefix continuous qo, qou 125 120/240 number curve no. 0730tc8709 drawing no. b48095-730-0 9 maximum clearing time (a t 50 hz) (a t 60hz) 125
28 ? 2005 schneider electric all rights reserved 09/2005 qou miniature cir cuit breakers and switches dimensions dimensions 1 & 2 pole 10a - 70a and 3 pole 10a -60a qou circuit breakers interrupting rating 10,000 amps max. rms sym series 3 terminal screw torque 43 lb/in 2.63 (67) 0.24 (6) 2.25 (57) 0.13 (3) 0.26 (7) 0.36 ( 9 ) 0.61 (16) 0.68 (17) 0.63 (16) 1.37 (35) 4.05 (103) install wire between lug body and terminal as shown terminal screw torque 43 lb/in 40? c mounting brackets to be installed on both ends as shown. catalog numbers: one-pole?qoumf1 two-pole?qoumf2 three-pole?qoumf3 0.18 (5) 0.38 (10) 1.15 (2 9 ) typical both ends 2.03 (51) 2. 9 5 (75) 5.00 (127) 0.35 ( 9 ) 07203030 1.50 (38) 0.75 (1 9 ) 1.37 (35) 15 off on 0.75 (1 9 ) 15 off on 0.75 (1 9 ) 0.62 (16) accessory package typical any circuit breaker (shunt trip, "a" or "b" switch, bell alarm) 15 off on 1.18 (30) typical both ends 0.76 (1 9 ) 2.12 (54) 2.25 (57) 0.33 (8) typical both ends visi-trip window 35 x 7.5 mm din rail 1.1 9 (30) 0.75 (1 9 ) dim. : in. / pulg / po mm 07203031
qou miniature circuit breakers and switches dimensions 29 09/2005 ? 2005 schneider electric a ll rights reserved 80a - 125a circuit breakers 100 auxiliary device 3.21 (82) 0.45 (11) 0.17 (4) 5.14 (130) 0.58 (15) 0.62 (16) 0.24 (6) 6.30 (160) 100 100 0.75 (1 9 ) 0.74 (1 9 ) 2.5 9 (66) 0. 9 1 (23) 0.75 (1 9 ) 1.50 (38) 07203032 26? re s et 0. 8 2 (21) 0. 3 9 (10) 4.45 (11 3 ) 6.7 8 (172) 0. 8 2 (21) 0.26 (7) 0.09 (2) 2. 3 7 (60) 2.96 (75) 21? off 2.25 (57) 0.59 (15) 1.00 (25) 22? on 3 ? tripped 1. 8 9 (4 8 ) 1.20 ( 3 0) common trip 2.07 (5 3 ) 1. 3 2 ( 3 4) 0.5 8 (15) 0.07 (2) 0.74 (19) 1-pole 1.4 8 ( 38 ) 2-pole 2.21 (56) 3 -pole 0.6 3 (16) 1.72 (44) 1.09 (2 8 ) 0720 3 0 3 2 dim: in. / pulg/ po mm
30 ? 2005 schneider electric all rights reserved 09/2005 qou miniature cir cuit breakers and switches qyu one-pole 277 vac supplementary protectors qyu one-pole 277 vac supplementary protectors description qyu 277 vac supplementary protectors are available fo r surface, flush or din-rail mounting in 1-pole construction. supplementary protectors are 3/4 in. (19.05 mm) wide. applications one-pole qyu 277 vac supplement ary protectors are ul recogniz ed component (meets ul 1077) to be applied on systems where the maximum phase-to-g round voltage is 277 vac or less, including use of 240 vac corner grounded delta ?grounded b? systems. these devices are designed to provide supplemental overcurrent protection in accordance with article 240-10 of the 2005 nec, which states that t hermal-magnetic supplement ary protectors cannot be used to replace the primary branch-circuit protection in an application. when used in combination with branch-circuit protection, as required in article 210 of the 2005 nec, these supplementary protectors can be used to protect lighting fixtures, appliances and other equipment or internal circuits and components of equipment. tripping characteristics the qyu trip characterstics are identical to those of the same amperage qou circuit breaker. see trip curves 730-1, -3, -4 and -5. table 9: selection data ul component recognized interrupting 5000 rms symmetrical amperes 1-pole?277 vac ampere rating catalog number terminal lug wire size (awg) 10 qyu110 1?#14?2 cu or al 20 qyu120 25 qyu125 30 qyu130
qou miniature circuit breakers and switches dimensions 31 09/2005 ? 2005 schneider electric a ll rights reserved dimensions qyu one-pole 277 vac supplementary protectors 15 off on 0.75 (1 9 ) 0.62 (16) 1.18 (30) typical both ends 0.76 (1 9 ) 07203035 dim. : in. / pulg / po mm 15 off on 0.75 (19) 0.62 (16) 1.18 (30) typical both ends 0.76 (19) 07203035 interrupting rating 5,000 amps max. rms sym series 3 terminal screw torque 43 lb/in 2.63 (67) 0.24 (6) 2.25 (57) 0.13 (3) 0.26 (7) 0.36 (9) 0.61 (16) 0.68 (17) 0.63 (16) 1.37 (35) 4.05 (103) install wire between lug body and terminal as show n terminal screw torque 43 lb/in 40 c mounting brackets to be installed on both ends as shown. catalog numbers: one-pole?qoumf1 0.18 (5) 0.38 (10) 1.15 (29) typical both ends 2.03 (51) 2.95 (75) 5.00 (127) 0.35 (9) 07203034
0720ct9401r1/05 ? 2005 schneider electric all rights reserved replaces 0720ct9401 dated 08/1994 3700 sixth st. sw cedar rapids, ia 52404 usa 1-888-square d 1-888-778-2733 09/2005 schneider electric usa

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