RSA-10-100

RS Series Precision Current / DC Current Shunts • • • • • • • Base Mounted Shunt Current Rating 5 to 1200 Amps 50mV, 100mV, or Custom Output Standard Tolerance ±0.25% UL Listed Manganin Resistive Element Common Applications: Solar Generators, Wind Power, Heavy Industry, Electroplating, Battery Chargers, Mining SPECIFICATIONS Type Rated Current (A) Operating Current (A) Resistance (mΩ) 50mV Output Resistance (mΩ) 100mV Output RSA-5 5 3.33 10.00 20.00 RSA-10 10 6.67 5.00 10.00 RSA-15 15 10 3.333 6.667 RSA-20 20 13.3 2.500 5.000 RSA-30 30 20 1.667 3.333 RSA-50 50 33.3 1.000 2.000 RSA-75 75 50 0.667 1.333 RSA-80 80 53.3 0.625 1.250 RSA-85 85 56.7 0.588 1.176 RSA-100 100 66.7 0.500 1.000 RSA-150 150 100 0.3333 0.6667 RSB-170 170 113 0.2941 0.5882 RSB-200 200 133 0.2500 0.5000 RSB-250 250 166 0.2000 0.4000 RSB-300 300 200 0.1667 0.3333 RSB-400 400 267 0.1250 0.2500 RSB-450 450 300 0.1111 0.2222 RSB-500 500 333 0.1000 0.2000 RSB-600 600 400 0.0833 0.1667 RSC-800 800 533 0.0625 0.1250 RSC-1000 1000 666 0.0500 0.1000 RSC-1200 1200 800 0.0417 0.0833 Drawing RSA RSB Riedon Inc. 08/16 300 Cypress Avenue Alhambra CA 91801 www.riedon.com (626) 284-9901 RSC (626) 284-1704 RS Series Precision Current / DC Current Shunts SPECIFICATIONS Rated Output 50mV, 100mV, Custom Voltage Tolerance ±0.25% Standard ±0.1% Available ( Contact Factory) Operating Temp. -40°C to +60°C Storage Temp. -55°C to 80°C Dielectric Strength 750VDC ( Terminal Block to Base) Materials Resistance Element: Manganin Terminal Block RSA & RSB: Brass Terminal Block RSC: Copper Hardware: Brass Solder: Lead Free Standard, Lead on Request Military Spec Built to A-A-55524, Commercial Version of MIL-S-61B Calibrated on Certified N.I.S.T Equipment Manganin Temperature Coefficient of Resistance ±15 PPM/C +0.04 % Change of Resistance +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 Temperature °C Ordering Information Part Description: Part Type - Voltage Output (mV) Example: RSA-100-50 Riedon Inc. 08/16 300 Cypress Avenue Alhambra CA 91801 www.riedon.com (626) 284-9901 (626) 284-1704 RS Series Precision Current / DC Current Shunts Dimensions RSA 2X 1/4-28 NUT .205 5.2 1.25 31.8 .88 22.4 8 .43 1.00 25.4 .1 11 TYPE Fastener Torque Weight RSA 3-3.33 ft-lbs (4.1-4.5 Nm) 0.1 Kg RSB 14-15 ft-lbs (19-20 Nm) 0.3 Kg RSC 32-35 ft-lbs (35-48 Nm) 0.9 Kg X HE 1.50 38.1 1.67 42.3 8-32 Screw 1.04 26.4 8-32 Output 14-15 in-lbs (1.6-1.7 Nm) .56 14.2 0 0 1.00 25.4 2.00 50.8 RSB RSC 2X 1/2-13 x 7/8 .205 5.2 1.75 44.5 1.25 31.8 1.63 41.3 .5 6 3 14 .3 HE 2X 2.000 50.8 2.500 63.5 X .7 3.66 93 1.50 38.1 2.16 54.9 1.25 31.8 HE 300 Cypress Avenue X 1.52 38.6 8-32 Screw .55 14 .58 14.7 0 0 0 0 3.25 82.6 08/16 .1 2.10 53.3 1.65 41.9 Riedon Inc. 19 50 2.250 57.2 2.50 63.5 8-32 Screw .205 5.21 4.50 114.3 Alhambra CA 91801 www.riedon.com (626) 284-9901 (626) 284-1704 RS Series Precision Current / DC Current Shunts TECHNICAL NOTES Mounting: Shunts should be mounted with manganin resistive blades in a vertical position in order to promote the free convectional flow of air. If vertical mounting is not practical, forced air cooling or adding heat sinks to the blocks can reduce the operating temperature. The manganin blades must never exceed +145°C, otherwise permanent resistance change may occur. When current of 100A or greater is passing through the shunt, the major portion of heat generated is dissipated 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 145°C ( 125°C 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. Mounting Orientation UP Current Current Output Voltage 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 40°C, 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 145°C ( 125°C recommended ). Many variables such as ambient temperature, cross section of the current carrying conductors, and pulse duration make calculating exact values difficult. Shunt size will need to be validated by customer for pulse current and duty cycle on a case by case basis. Riedon Inc. 08/16 300 Cypress Avenue Alhambra CA 91801 www.riedon.com (626) 284-9901 (626) 284-1704