GE 745 Instruction Manual page 297

CHAPTER 7: COMMISSIONING
7.6.3.2 Operating Time
Note
NOTE
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
Using the setup in Frequency element testing on page 7–44 with the interval timer enabled,
 Set the current level to 1.5 times the operate level of the element and
apply suddenly by closing the double pole switch.
 Record the operate time and compare to the
XFORMER OVERLOAD
The blocking from logic input, if enabled, can be tested as described in earlier tests for
other elements.
AUXILIARY PROTECTION AND MONITORING FUNCTIONS
TRANSFORMER OVERLOAD DELAY

S4 ELEMENTS

setting.
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