GE 760-P5-S1-HI-A10-G-T digital relay

760: Product series identifier, belonging to the GE Multilin 750/760 feeder management relay family.

P5: Advanced protection function group, supporting complex protection algorithms (such as differential, distance, overcurrent protection, etc.), with more comprehensive fault detection capabilities compared to basic models (e.g., P1).

S1: Basic communication interface group, possibly supporting standard RS485 or Modbus protocols, suitable for scenarios with low communication requirements (compared to enhanced interfaces like S5).

HI: High Impedance Grounding Protection, designed for high-resistance grounding systems to accurately detect ground faults.

A10: Analog output configuration, possibly including 10 channels of 4-20mA outputs for remote monitoring of electrical parameters (such as current, voltage, power, etc.).

G-T: Installation and environmental characteristics, where G represents DIN Rail mounting, and T indicates wide-temperature design (broad operating temperature range).

High Impedance Grounding Protection (HI):
Specifically designed for high-resistance grounding systems (such as distribution networks with neutral resistive grounding), it can detect small-current ground faults (e.g., cable insulation damage, non-metallic short circuits) to prevent fault expansion.

Comprehensive Overcurrent Protection:
Supports phase current and zero-sequence current protection, equipped with inverse-time/definite-time curves (complying with IEC/ANSI standards), and allows multi-level tripping threshold settings to adapt to different load scenarios.

Distance Protection (Optional Expansion):
A line protection function based on impedance measurement, used for rapid location and clearing of transmission line faults, supporting multi-stage protection logic.

Frequency and Voltage Protection:
Includes overfrequency/underfrequency protection and overvoltage/undervoltage protection to safeguard generators, transformers, and other equipment sensitive to electrical parameters.

Reclosing and Synchronization Checking:
Supports automatic reclosing function, combined with a synchronization checking mechanism to avoid system impacts caused by asynchronous closing.

High-Precision Metering:
Built-in metering module for real-time monitoring of parameters such as voltage, current, active/reactive power, frequency, and harmonic content, with an accuracy of 0.2%, replacing independent metering devices.

Circuit Breaker Condition Monitoring:
Tracks circuit breaker operation times and contact wear, predicts maintenance cycles, supports trip coil fault detection, and enhances equipment reliability.

Logic Programming and Automation:
Built-in programmable logic (similar to PLC), supporting customized control strategies (such as automatic backup power switching BZT, bus section control) to adapt to complex distribution system requirements.

S1 Communication Interface:
Standard RS485 interface supporting Modbus RTU or DNP3.0 protocols, enabling communication with SCADA systems or host computers for remote monitoring and data transmission.

Analog Outputs (A10):
10 channels of 4-20mA analog outputs, converting electrical parameters into standard signals for access to external monitoring devices or recorders.

Event Recording and Waveform Capture:
Stores pre-fault/post-fault waveform data (resolution ≤1ms), supporting fault replay analysis to facilitate quick fault cause location.

IRIG-B Time Synchronization:
Supports external clock synchronization to ensure time consistency of event records across multiple devices, improving fault analysis efficiency.

Built-in Simulation Testing Function:
Simulates fault scenarios via software without external testing equipment, verifying protection action logic and simplifying the debugging process.

Medium and High-Voltage Distribution System Protection:
Suitable for feeder protection in 10kV-110kV distribution networks, especially in high-resistance grounding systems (such as urban power grids, industrial parks), serving as primary or backup protection.

High-Resistance Ground Fault Detection:
Used for ground fault protection of cable lines, transformers, and other equipment, avoiding insulation aging or intermittent arcing caused by small-current ground faults.

Industrial and Commercial Power Systems:
Medium-voltage distribution systems in industries like steel, petrochemicals, and mining, supporting rapid clearing of equipment overload, short circuit, ground faults, etc., to ensure production continuity.

Distributed Energy Grid Connection:
Protection and control for grid connection scenarios of photovoltaic power stations, energy storage systems, etc., supporting islanding protection and grid connection control during frequency/voltage anomalies.

High Reliability: Professional design for high-resistance ground faults reduces system risks caused by ground faults and improves power supply reliability.

Flexibility: Modular configuration supports function expansion, allowing adjustment of protection strategies based on system needs to adapt to different grid topologies.

Cost-Effectiveness: Integrates metering, protection, and control functions, reducing equipment quantity and cabling costs while simplifying system architecture.

Intelligent Operation and Maintenance: Real-time status monitoring and predictive maintenance functions reduce manual inspection costs and shorten fault troubleshooting time.