Seg HighTECH MRG3 - Test with Transformer Secondary Current (Secondary Injection Test); Equipment Required to Test Voltage Functions

SEG Electronics GmbH Manual MRG3
66 DOK-TD-MRG3, Rev. D
Figure 6.2: Test circuit for the vector surge function
6.5 Test with transformer secondary current
(Secondary injection test)
6.5.1 Equipment required to test voltage functions
 Amperemeter and voltmeter, class 1 or higher,
 auxiliary voltage source supply with the voltage corresponding to the rated data pn the type
plate,
 single-phase alternating current source (adjustable from 0 to 4 x Un
 single-phase alternating current source (adjustable from 0 to 1.2 x Un – only required for
the relay version MRG3-IER with directional feature,
 timer to measure the operating time (Accuracy class ±10 ms),
 switching device and measuring lead.