Measuring system MAK E-TIGER 3003
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Measuring System MAK TIGER 3003 Service manual, SA 131128, 10.03.2020
6.13.3 Phase monitoring relay
The unit monitors a three-phase supply for phase sequence, phase failure and
phase asymmetry, undervoltage and overvoltage.
A change-over contact is used for the alarm or disconnection in the event of
power failures (voltage or asymmetry), the second change-over contact only
responds to an incorrect phase sequence. This can cause the direction of ro-
tation to be corrected automatically in association with a contactor reversing
combination.
With adjusted closed current principle
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