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Current and Voltage Controls 3-Phase Voltage Sequence Control Type SM 170
* 3-phase monitoring relay for phase sequence/phase loss * Measures when all 3 phases are present and have the correct phase sequence * Output: 10 A SPDT relay * Plug-in type module * S-housing * LED-indication for power supply and output ON * Power supply is the 3-phased measuring voltage
Product Description
3-phase plug-in monitoring and phase sequence/phaseloss relay. Frequently used to prevent a 3-phase motor from running on only 2 phases or to secure the right phase sequence when connecting a load to the mains.
Ordering Key
Housing Function Output Type Power supply
SM 170 400
Type Selection
Plug Circular Output SPDT Supply: 220 VAC SM 170 220 Supply: 380 VAC SM 170 380 Supply: 400 VAC SM 170 400 Supply: 415 VAC SM 170 415
Input Specifications
Input Pin 5 Pin 6 Pin 7 Pin 11 Phase L1 Phase L2 Phase L3 Neutral (optional connection) measures on own supply
Output Specifications
Output Rated insulation voltage Contact ratings (AgCdO) Resistive loads AC 1 DC 1 or Small inductive loads AC 15 DC 13 Mechanical life Electrical life AC 1 Operating frequency Dielectric strength Dielectric voltage Rated impulse withstand volt. SPDT relay 250 VAC (rms) (cont./elect.) (micro gap) 10 A/250 VAC (2500 VA) 1 A/250 VDC (250 W) 10 A/25 VDC (250 W) 2.5 A/230 VAC 5 A/24 VDC 30 x 106 operations 2.5 x 105 operations (at max. load) 7200 operations/h 2 kVAC (rms) (cont./elect.) 4 kV (1.2/50 s) (cont./elect.) (IEC 60664)
Supply Specifications
Power supply AC types Rated operational voltage Through pins 5, 6, 7 & 11 220 380 400 415 Internal measuring circuit is connected to pins 5 & 7 Voltage interruption Dielectric voltage Rated impulse withstand volt. Overvoltage cat. III (IEC 60664) (IEC 60038) 3 x 220 VAC 15%, 45 to 65 Hz 3 x 380 VAC 15%, 45 to 65 Hz 3 x 400 VAC 15%, 45 to 65 Hz 3 x 415 VAC 15%, 45 to 65 Hz
Rated operational power
40 ms None (supply/elect.) 4 kV (1.2/50 s) (line/neutral, line/line), direct connection to electronics 2.5 VA
Specifications are subject to change without notice
1
SM 170
General Specifications
Reaction time Indication for Power supply ON Output ON Environment Degree of protection Pollution degree Operating temperature Storage temperature Weight Approvals = 0.5 s, worst case reaction time may be up to 5 x LED, green LED, red (IEC 60947-1) IP 20 B (IEC 60529) (IEC 60664) 1: SM 170 380/400/415 2: SM 170 220 -20 to +50C (-4 to +122F) -50 to +85C (-58 to +185F) 200 g UL, CSA, SEV (SEV only 3 x 220 VAC)
Mode of Operation
The relay measures on its own 3-phased power supply and operates when all phases are present and the phase sequence is correct. Example 1 The relay is for monitoring that the power supply has a correct phase sequence and that all phase voltages are present. The relay is a 3-phase power supply monitoring relay. Example 2 The relay releases in case of interruption of one of the phases, provided that the voltage regenerated by electric motors on the interupted phase does not exceed 70% of the nominal voltage. If it exceeds this value the connection cannot be recommended (see description ex. 3). The regenerated voltage will be a lower phase voltage combined with a phase angle failure. Example 3 If the value of the regenerated voltage is slightly higher than 70% of the nominal voltage, the relay releases when neutral is connected to pin 11 as sensitivity is improved.
Wiring Diagrams
Example 1 Example 2 and 3
Accessories
Sockets Hold down spring Mounting rack Socket covers Front mounting bezel S 411 HF SM 13 BB 4 FRS 2
For further information refer to "Accessories".
Operation Diagram
Phase L1, pin 5 Phase L2, pin 6 Phase L3, pin 7 Relay ON
2
Specifications are subject to change without notice

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