This model provides a full suite of protection capabilities for distribution feeders, including:

Overcurrent protection

Ground fault protection

Phase imbalance protection

Voltage loss / undervoltage protection

Reverse power protection

It supports high-sensitivity, selective multi-frequency admittance grounding protection, and can be optionally equipped with advanced fast fault-location functions for both short-circuit and ground faults. In specific applications, the device can also be used for motor protection.

The terminal supports 1–3 shots of automatic reclosing (AR) and integrates trip and close circuit supervision, enabling rapid action during faults, automatic status locking, and timely alarm issuance.

High-Precision Measurement and Status Monitoring

The device can accurately measure key electrical quantities such as:

Phase current, line voltage

Zero-sequence current and zero-sequence voltage

It can further calculate:

Active and reactive power

Electrical energy

Power factor

Frequency

These measurements support comprehensive monitoring of distribution system operating conditions.

The terminal includes a complete self-diagnostics suite, capable of performing:

PT disconnection monitoring

CT circuit integrity monitoring

Other internal abnormality detection

This ensures timely identification of equipment or circuit issues.

Flexible Communication and Convenient Control

To meet substation automation and distribution automation interconnection requirements, the device supports multiple mainstream communication protocols, including:

IEC 61850 (Edition 1 & Edition 2, with HSR/PRP redundancy and GOOSE communication)

Modbus

DNP3

IEC 60870-5-103

It also supports IEEE 1588 v2 high-precision time synchronization, ensuring accurate timestamps for fault records and event logs.

Communication and control interfaces include Ethernet, RS-485, and RS-232, enabling both local and remote control operations.