The Common Mode Rejecter (CMR) is an electronically compensated uncoupling unit for elimination of interaction of simultaneously tested electricity meters having interconnected current and voltage circuits (closed I-P links).

The CMR-I 1x30 is universal small-sized electronically controlled precision current transformer unit for galvanically isolating current. The through-hole, single wire unit with possibility of user defined current ratio is dedicated for testing of electricity meters with closed current and potential circuits. Versatility of the unit enables utilization in extensive applications as step-up or step-down precision current transducer with excellent dynamics.

The CMR-I 1x30 is constructed as universally applicable standalone unit with easy implementation to any existing test bench system. The unit has negligible additional power loss therefore no power increase is needed for closed link test capability. The unit enables any user defined current ratio between primary and secondary circuit. The current ratio is defined by primary and secondary coil via number of respective turns. The internal electronics of the device assures exact primary and secondary ampere-turns equality.

Highlights

• Standalone through-hole universal transformer with single wire capability
• Excellent accuracy and dynamics
• Built-in open circuit and overload protection
• Easy user-friendly mounting, negligible power loss and built-in protection permit simple extension of any existing meter test equipment to closed I-P link testing capability
• No short circuit of unused positions needed (the unit without load is in protection state shorted automatically)
• Unity transfer ratio of the CMR unit enables simple user test of functionality and accuracy
• Up or down current transformation with specified accuracy

SPECIFICATIONS