Changyuan Shenru ISA-367G Line Protection and Control Device

The ISA-367G is an integrated device for line protection and control, providing functions such as protection, measurement and control, and operation for transmission lines.

1.1 Basic Configuration

Protection Functions:
? Phase current over-limit recording element with independent threshold
? Three-stage low-voltage blocking directional overcurrent protection (directional element and low-voltage element can be set independently)
? Low-voltage blocking phase current post-acceleration protection
? Three-phase one-shot auto-reclosing (with optional synchronization check, voltage check, and overcurrent blocking reclosing function)
? Under-frequency load shedding with slip frequency blocking
? Under-voltage load shedding with voltage slip blocking
? Zero-sequence directional overcurrent protection for ungrounded systems
? Overload protection
? Control circuit break alarm with optional reclosing blocking function
? Bus PT break alarm with optional blocking of voltage-related protections and line PT break alarm with blocking of auto-reclosing
? Independent operating circuit and fault recording
Measurement and Control Functions: ? 3 position remote signals collected via the operating circuit
? 8 remote signal inputs, with options for blocking reclosing, external trip input, external alarm input, external reset, and maintenance input.
? Multiple soft remote signals, including general fault signal, reclosing charging flag, and protection soft switch position
? 19 telemetry measurements including Ia, Ib, Ic, Ua, Ub, Uc, 3I0, Uab, Ubc, Uca, 3U0, Pa, Pb, Q, S, COSφ, and Fr
? Remote control of switches and soft switches, with remote control operation records and statistics
? Large-capacity event records, SOE records, self-test records, and instantaneous protection blocking records
? Harmonic analysis function up to the 11th order
? Remote control function with five-prevention interlocking rules consistent with the five-prevention host
Other Functions:

 ? Optional voltage switching module