Advantages of Microcomputer-Based Relay Protection Devices

Integrates multiple functions including protection, measurement, monitoring, control, human-machine interface, and communication. It replaces various conventional relays and measuring instruments, saving substantial installation space and control cables.

Adopts a 32-bit Digital Signal Processor (DSP), featuring an advanced core architecture, high-speed computing capability, and superior real-time signal processing performance.

Supports conventional RS485 bus and DeviceNet (CAN) fieldbus communication. The CAN bus is equipped with error correction mechanisms such as automatic retransmission of error frames and automatic disconnection of faulty nodes, ensuring the real-time performance and reliability of information transmission.

Designed with a fully enclosed metal enclosure and an ultra-slim profile. The net depth of the enclosure is only 100 mm, enabling installation in all types of switch cabinets, especially ring main units.

Adopts surface-mount technology. Critical components (such as chips, power modules, transformers, relays, capacitors, liquid crystal displays, and wiring terminals) adopt mature products from well-known international manufacturers, with the Mean Time Between Failures (MTBF) reaching 100,000 hours.

Possesses comprehensive self-diagnosis functions to automatically generate alarms upon detection of device abnormalities. It features self-protection capability to effectively prevent permanent damage caused by incorrect wiring or abnormal operation. With maintenance-free design, no on-site adjustment of sampling accuracy is required, and measurement errors will not increase due to environmental changes and long-term operation.

Equipped with an internationally universal input power module, compatible with AC/DC operating power ranging from 85 V to 264 V, and delivers excellent performance during power dips and voltage surges.

The circuit breaker operating loop is provided with a universal AC/DC hardware anti-pumping interlock module, whose normal operation is unaffected by the current of the tripping/closing circuit. The enhanced circuit breaker operation management function is applicable to substations and distribution stations under various operating modes.

Digital input supports direct tripping or alarming for critical protection and interlock tripping scenarios such as gas concentration and temperature monitoring. Adopting an adjustable change confirmation time window technology, it effectively eliminates switch contact jitter and electromagnetic interference, achieving 100% remote signaling accuracy.

The human-machine interface is designed in line with ergonomic principles, equipped with a backlit graphic liquid crystal display (LCD), menu-based operation, full Chinese display, and optimized screen saver control. Display contents include measured data, digital status, real-time waveforms, event records, fault recording, protection setting values, and system parameters.

Supports event recording to log all events related to the safe operation of the power system, with a time resolution of less than 1 ms. It can store 100 online events without data loss upon power failure, facilitating fault cause analysis and equipment defect diagnosis.

Provided with a fault recording function, which accurately records current, voltage, switch status and other data before and after faults. It adopts a sampling density of 24 points per cycle, with a recording duration of 2 cycles before the fault and 7 cycles after the fault, and all data is retained after power outage.

Enables manual switching among multiple sets of protection setting values.