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Details the construction and operation of the induction unit.
Verifies model number and rating against requisition.
Checks for friction, spring condition, armature movement, and contacts.
Recommendations for testing relays in their cases or equivalent steel cases.
Explains the effect of frequency and waveforms on AC devices.
Explains how to set the time dial for unit operation.
Details the procedure for testing the pickup current of the time-overcurrent unit.
Outlines testing the operating time of the time-overcurrent unit.
Describes setting adjustment and checking the pickup of the instantaneous unit.
Outlines tests for the pickup and dropout current of the seal-in unit.
Installation tests for time-overcurrent, target, and seal-in units.
Maintenance checks for time-overcurrent, instantaneous, and seal-in units.
Recalibration procedures for the time-overcurrent unit if out of limits.
Details time adjustment and testing for the time-overcurrent unit.
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