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

The ISA-392GB is an integrated capacitor protection, measurement, and control device that provides protection, measurement, control, and operation functions for capacitors.

1.1 Basic Configuration
Protection Functions
1. Independently configurable three-stage current protection
2. Definite-time overvoltage protection
3. Current-blocked undervoltage protection
4. Inverse-time overcurrent protection
5. Zero-sequence overcurrent protection
6. Unbalanced voltage or zero-sequence differential voltage protection
7. Unbalanced current or zero-sequence differential current protection
8. PT disconnection alarm, control circuit disconnection alarm
9. Independent operation circuit and fault recording
Measurement and Control Functions:
1. 3 position teleindication signals collected via the operation circuit; 20 teleindication inputs, with options for reclosing blocking, external trip input, external alarm input, external reset, and device maintenance; multiple soft teleindication signals, including general fault signal, reclosing charging flag, and protection soft settings
2. 18 telemetry measurements including Ia, Ib, Ic, Ua, Ub, Uc, 3I01, Uab, Ubc, Uca, Pa, Pb, Pc, Q, S, COSφ, Fr
3. Remote control of switches, with recording and statistics of remote control operations
4. Large-capacity event recording, SOE recording, self-check recording, instantaneous protection blocking recording, printing (optional function)
5. Harmonic analysis function up to the 13th order

1.2 Device Performance Features
1) The overall design incorporates operational experience from over a thousand ISA-type substation automation systems, utilizing the most advanced software and hardware technologies to deliver high overall performance. Suitable for protection and measurement-control systems in both manned and unmanned substations, whether new or retrofitted.
2) Equipped with an ARM Cortex-M4 architecture processor operating at up to 120MHz and high-precision AD sampling, providing powerful computation and logic functions.
3) Hierarchical distributed structure, unitized design, modular architecture, with strong expandability.
4) Large-screen Chinese character LCD display, intuitive and user-friendly interface menu, comprehensive process recording, detailed and intuitive information, easy operation and debugging. Optionally available with an extra-large color LCD screen, supporting yellow, green, and red vector diagrams for more intuitive and comprehensive display.
5) Fully leverages the advantages of microprocessor-based protection to greatly facilitate user operation.
6) Analog circuits use high-precision, wide-range components without amplitude or phase adjustment circuits. Amplitude and phase adjustments are handled by software, making the circuit simple, reliable, drift-free, and reducing debugging and maintenance workload.
7) Utilizes high-reliability industrial-grade components as the mainstay, with automatic monitoring and compensation technologies to enhance hardware circuit stability and reliability.
8) Sealed, reinforced unit chassis with multi-layer shielding for vibration and strong interference resistance, specially adapted for harsh environments. The chassis can be dispersed and installed on switchgear and ring main units for operation.