HVTest HT-802, Руководство пользователя

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Signal relay wiring Time relay wiring
Section 4 Frequency Test
The module is mainly used testing low cycle load shedding and circumferential resection
protection features.
1. [Action frequency ( return frequency ) test]
If start frequency was greater than the stop frequency, low-frequency test is needed;
Start frequency was less than the stop frequency, high-frequency test is needed, the program
automatically discriminating the direction of change of the frequency. The test can be
automatic or manual, the program automatic record the operation frequency and return
frequency. The start frequency output hold-up time is generally 3-5 seconds, so that
protection into the normal operating state.