Chapter 10. Receiving Tests
10-5
M7IRDA2003I
7IRD-A/J/M: Distribution Protection & Control Terminal
© ZIV APLICACIONES Y TECNOLOGÍA, S.L.U. 2020
Operating Times
For this test use the trip contacts C7-C8 and C9-C10 (for others examples, see the external
connection scheme).
Figure 10.1
Connection Diagram for the Time Metering Test.
Fixed or Instantaneous Time
Apply a current 20% larger than the pickup setting. The response time should correspond with
5% or 25ms (whichever is better) of the selected time setting value. Keep in mind that the
setting at 0ms will have a response time of approximately 30ms.
Inverse Time
For each time/current characteristic, tripping time is given by the selected Time Dial Setting and
the applied current (multiple of pickup current setting; see Time Characteristic Curves figures on
Chapter 6). Tolerance is
5% of the current value.
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