GE Industrial Solutions Entellisys 4.0 System Test Kit User Manual - Manual (Page 25)

Test Menu 25
Pre-defined values for Overcurrent Protection tests
Test results
Test Selection Specifies the type of test to perform. Operator selectable.
Only enabled protection functions for the selected circuit breaker are
provided in drop-down.
Pre-Defined Settings Displays the pre-defined fault levels to be injected for the test and circuit
breaker selected. Levels for Prefault, Fault, and Post faults are described in
Table 1-4.
These values are determined with respect to the circuit breaker selected and
its protection settings.
Fault Phase The phase(s) for fault injection. Operator selectable.
Options for LT, ST, IOC Test Selection is: Phase A, Phase B, Phase C, Phase A &
B, Phase B & C, Phase C & A, Phase A, B & C
Option for GF Test Selection: Phase A, Phase B, Phase C, and Neutral
Table 1-4 Pre-defined values for Overcurrent Protection tests
Type of Test Prefault
(for all Phases) Fault
(for selected Phases) Post Fault
(for all Phases)
Long Time 80.00% of LT Pickup 135.00% of LT Pickup 0% of LTPickup
Short Time 80.00% of ST Pickup 110.00% of ST Pickup 0% of LTPickup
Instantaneous 80.00% of IOC Pickup 110.00% of IOC pickup 0% of LTPickup
Ground Fault 40% of CT 110.00% of GF Pickup 0% of GF Pickup
Table 1-5 Test results
Time Stamp Table Provides a time stamp history of the Breaker Status (Open or Closed) and the
Breaker Actuation device involved in the trip (Flux Shifter or Shunt Trip).
Expected Trip Time Expected trip time automatically calculated from the pickup & delay band settings
and circuit breaker clearing time.
Observed Trip Time Observed trip time displayed after the test is performed.
Test Summary LED Specifies the test results by comparing the observed trip time with the expected
trip time.
Green Successful (within +/– 20% of expected time)
Red Unsuccessful
Gray Test Aborted
Table 1-3 Test setup field description