Changyuan Shenrui ISA-392GC Grounding Transformer/Station Service Transformer Protection, Measurement, and Control Device

The ISA-392GC is an integrated protection, measurement, and control device for grounding transformers/station service transformers, providing functions such as protection, measurement, control, and operation.

1 Basic Configuration

Protection Functions 

1. Three-stage overcurrent protection on the high-voltage side
2. Two-stage directional zero-sequence overcurrent protection on the high-voltage side
3. Two-stage zero-sequence overcurrent protection on the low-voltage side
4. Four-stage non-electrical quantity protection
5. Control circuit break alarm
6. High-voltage side bus PT break alarm
7. High-voltage side bus ground alarm
8. Overload protection
9. Inverse-time overcurrent protection
Measurement and Control Functions:
1. 3 position remote signals collected via the operation circuit; 20 remote signal inputs, with options for blocking reclosing, external trip input, external alarm input, external reset, and device maintenance; multiple soft remote signals, including general fault signal, reclosing charging flag, and protection soft壓板
2. 18 telemetry quantities including Ia, Ib, Ic, Ua, Ub, Uc, 3I01, Uab, Ubc, Uca, Pa, Pb, Q, S, COSφ, Fr
3. Remote control of switches, with records and statistics of remote control operations
4. Large-capacity event records, SOE records, self-check records, instantaneous protection blocking records, and printing (optional function)
5. Harmonic analysis function up to the 13th order