Thermal Image Element - GE F650 User Manual

6 COMMISSIONING

6.18 THERMAL IMAGE ELEMENT (49)

Disable all protection elements except for Thermal Model (49).
Set the pickup level to 2 A.
Set the time constant t1 to 3 minutes and t2 to one time t1.
Apply currents of 2, 5, and 10 times the tap and ensure that the operation times are within the range described on the
following table:
RATED CURRENT (A)
5
After each measuring, the thermal element must be reset to zero in order to start the next test at a zero thermal status
condition.
Repeat the test selecting a time constant t1 of 60 minutes. Verify that the operation time is within the range described on
the following table:
RATED CURRENT (A)
5
After each measuring, the thermal element must be reset to zero in order to start the next test at a zero thermal status
condition.
GEK-113000AE
APPLIED CURRENT (A) TIMES DE SET TAP
4.0 2
10.0 5
20.0 10
APPLIED CURRENT (A) TIMES DE SET TAP
4.0 2
10.0 5
20.0 10
F650 Digital Bay Controller
6.18 THERMAL IMAGE ELEMENT (49)
OPERATION TIME (S)
48.5 - 53.6
7.06 - 7.80
1.77 - 1.95
OPERATION TIME (S)
960 - 1072
141 - 156
35.4 - 39
6
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