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The following intelligent amplifiers can be used in combination with any multiple phase CMC test set listed on the previous pages to extend the testing range and power.
Up to 4 current amplifier units can be paralleled for up to 3-phase, 200 A output. The interconnection between the CMC and the amplifier units is effected by means of a control cable to be connected at the back of the units. The outputs of the amplifier units are galvanically separated from the input and the ground and can be used independently and additionally to those of the CMC 256/156 (e.g. for differential protection testing). Amplifier outputs can be configured in various ways (connected in parallel, serial, etc.).
