riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 02/17 www.riedon.com rsn series ? 1 amp to 500 amp ? 0.1% tolerance ? manganin resistive element ? calibration certi? cate available ? common application: power supply power converters current measurements dc ammeter shunts / busbar shunts specifications type rated current (a) operating current (a) resistance (m ? ) 50mv output resistance (m ? ) 100mv output rsn-1 1 0.667 50 100 rsn-2 2 1.33 25 50 rsn-5 5 3.33 10 20 rsn-10 10 6.67 5.0 10 rsn-20 20 13.33 2.5 5.0 rsn-50 50 33.33 1.0 2.0 rsn-100 100 66.67 0.5 1.0 RSN-150 150 100 0.333 0.667 rsn-200 200 133.33 0.25 0.50 rsn-250 250 166.67 0.20 0.40 rsn-300 300 200 0.167 0.333 rsn-400 400 266.67 0.125 0.25 rsn-500 500 333.33 0.10 0.20 specifications rated output 50mv, 100mv, custom voltage tolerance 0.1% operating temp. 30c to 70c storage temp. -55c to 80c materials resistance element: manganin terminal block rsn: brass base: bakelite +0.04+0.02 0 -0.02-0.04 -0.06 -0.08 -0.10 -0.12 10 20 30 40 50 60 70 80 90 100 % change of resistance temperature c manganin temperature coecient of resistance 15 ppm/c *applies to resistance element only 1 amp - 500 amp operating current derating: for continuous operation, it is recommended that shunts are not run at more than two thirds (2/3) the rated current under normal conditions per ieee standards for dc instrument shunts. at ambient temperatures above 40c, the current must be further derated to prevent damage.
riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 02/17 www.riedon.com dimensions (mm) part description: part type - voltage output (mv) example: rsn - 1 - 50 ordering information 9 1 . 2 6 m m , 3 . 5 9 3 1 1 4 .1 3 m m , 4 .5 0 0 1 3 3 .3 5 m m , 5 .2 5 0 1 5 2 . 4 m m , 6 0 0 0 5.08 mm, .200 11.89 mm, .468 3 1 . 7 5 m m , 1 . 2 5 0 3 / 8 - 1 6 s c r a 1 3 . 9 7 m m , . 5 5 0 b type 50mv output type 100mv output a b a b rsn-1-50 35.05 12.7 rsn-1-100 35.05 12.7 rsn-2-50 35.05 12.7 rsn-2-100 35.05 12.7 rsn-5-50 35.05 12.7 rsn-5-100 35.05 12.7 rsn-10-50 35.05 12.7 rsn-10-100 35.05 12.7 rsn-20-50 35.05 12.7 rsn-20-100 35.05 12.7 rsn-50-50 35.05 12.7 rsn-50-100 35.05 12.7 rsn-100-50 35.05 12.7 rsn-100-100 35.05 12.7 RSN-150-50 35.05 12.7 RSN-150-100 35.05 12.7 rsn-200-50 35.05 12.7 rsn-200-100 35.05 12.7 rsn-250-50 41.40 19.05 rsn-250-100 35.05 12.7 rsn-300-50 41.40 19.05 rsn-300-100 35.05 12.7 rsn-400-50 41.40 19.05 rsn-400-100 41.40 19.05 rsn-500-50 41.40 19.05 rsn-500-100 41.40 19.05 rsn series dc ammeter shunts / busbar shunts 1 amp - 500 amp
riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 02/17 www.riedon.com technical notes mounting : shunts should be mounted with manganin resistive blades in a vertical position in order to promote the free convectional ? ow of air. if vertical mounting is not practical, forced ai r cooling or adding heat sinks to the blocks can reduce the operating temperature. the manganin blades must never exceed +145c, otherwise permanent resistance change may occur. when current of 100a or greater is passing through the shunt, the major portion of heat generated is dis- sipated by conduction through the shunt terminal blocks into the connecting buss bar or cable. therefore it is necessary to insure that good contact is made between the shunt terminal blocks and the conductor terminals and that the conductors have adequate cross section to keep the temperature of the shunt from exceeding 145c ( 125c recommended ). if the shunt is mounted in an enclosure, care must be taken to ensure adequate cooling. if the power density is greater than 1/4 watt per square inch of the enclosure surface for all enclosed devices, additional cooling must be supplied in the form of air vents or fans. shunts also must be installed in a way that protects them from thermal expansion forces produced from buss bar or short-circuit forces. flexible wiring may be required in high pulse current, high vibration, or high temperature applications. where possible, all shunts should be mounted on the ground side of the circuit. for circuits above 750vdc, rs shunts must be mounted on the ground side due to the dielectric strength of the shunt base. output voltage current current mounting orientation up operating current derating: for continuous operation, it is recommended that shunts are not run at more than two thirds (2/3) the rated current under normal conditions per ieee standards for dc instrument shunts. at ambient temperatures above 40c, the current must be further derated to prevent damage. pulse operation: shunts that do not need continuous operation and are only exposed to intermittent pulses can be operated at levels above their rated current for short periods of times. pulses are limited to the maximum temperature of the blades not exceeding 145c ( 125c recommended ). many variables such as ambient temperature, cross section of the current carrying conductors, and pulse duration make calculating exact values di? cult. shunt size will need to be validated by customer for pulse current and duty cycle on a case by case basis. rsn series dc ammeter shunts / busbar shunts 1 amp - 500 amp
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