ISA-392GB-MP Capacitor Protection Measurement and Control Device

Changyuan Shenrui ISA-392GB-MP Capacitor Protection, Measurement and Control Device

1. Overview
The ISA-392GB-MP is a conventional integrated device for capacitor protection, measurement, and control at 66kV and below. It provides capacitor protection, measurement and control, and operational functions, suitable for various substations, power plant auxiliary systems, and large industrial and enterprise power systems.

1.1 Basic Configuration

Protection Functions
1. Three-stage overcurrent protection (with optional inverse time characteristic for overcurrent stage III)
2. Two-stage zero-sequence overcurrent protection (with optional trip or alarm for zero-sequence overcurrent stage II, and optional inverse time characteristic)
3. Unbalance voltage protection
4. Unbalance current protection
5. FC overcurrent blocking protection
6. Overvoltage protection
7. Undervoltage protection
8. Zero-sequence overvoltage alarm
9. Non-electrical quantity 1-4 protection
10. PT disconnection alarm, control circuit disconnection alarm, spring not charged alarm, CT disconnection alarm, TWJ abnormal alarm
Measurement and Control Functions
1. Complete operation circuit and switch position acquisition; operation board without pressure blocking function
2. Remote operation hard plate, maintenance status switching, signal reset, and other function inputs
3. Hard plate for spring not charged input function
4. 24 remote signal inputs
5. Multiple soft remote signals, including general fault signal, etc.
6. 22 telemetry quantities: Ua, Ub, Uc, I0, I0l, Iam, Ibm, Icm, Uab, Ubc, Uca, Pa, Pb, Pc, Qa, Qb, Qc, P, Q, S, COSφ, Fr
7. One remote control output function; protection soft plate supports remote control. Remote control operation recording and statistics functions
8. Large-capacity event recording, SOE recording, self-check recording, and instantaneous blocking protection recording
9. Telemetry harmonic analysis function
10. Two DC 4~20mA outputs (optional)

1.2 Main Performance Features
1. Unitized design and modular structure with high expandability.
2. Functions include event recording, waveform recording, LCD display, communication, and printing.
3. Utilizes 16-bit high-precision AD sampling with powerful computation and logic capabilities.
4. Analog circuits use high-precision, wide-range components without amplitude or phase adjustment circuits. Software adjusts amplitude and phase, ensuring simple, reliable, drift-free circuits with low debugging and maintenance workload.
5. Equipped with two 100Mbps Ethernet ports, two RS-485 ports, one RS-232 printer serial port, two DC outputs, and one time synchronization port. Supports power industry standard DL/T667-1999 (IEC60870-5-103).
6. Multiple time synchronization methods: electrical second pulse, electrical B code, and SNTP synchronization.
7. Chinese character LCD display, intuitive and user-friendly interface menu, comprehensive process recording, detailed and clear information, easy operation and debugging.
8. High-reliability industrial-grade components with automatic monitoring and compensation technology to enhance hardware circuit stability and reliability.
9. Sealed, reinforced unit chassis with multi-layer anti-vibration and strong anti-interference design, especially suitable for harsh environments. 4U half-layer chassis can be dispersed and installed on switchgear for operation.