Changyuan Shenrui PRS-3393G Anti-Islanding Protection Measurement and Control Device

1.1 Device Overview

The PRS-3393G Anti-Islanding Protection Measurement and Control Device integrates anti-islanding, protection, control, and measurement functions into a single unit. It is primarily used in low-voltage distribution systems for power distribution networks and renewable energy grid connections. Installed in switchgear and ring main units, it works in conjunction with distribution switches to provide anti-islanding protection, telemetry, remote signaling, remote control, metering, and data recording functions for distribution lines.

1.2 Performance Features

1) Utilizes a 32-bit ARM Cortex core and high-precision 16-bit independent AD, offering powerful computing and logic capabilities.

2) Employs high-reliability industrial-grade components and adopts automatic monitoring and compensation technologies to enhance hardware circuit stability and reliability.

3) Features a Chinese character LCD display with a user-friendly interface, convenient keypad operation, and a tree-style menu. All internal information, including remote signaling, telemetry, trip reports, and alarm reports, is displayed in Chinese on the screen, facilitating debugging, operation, and maintenance.

4) Covers protection, measurement and control, and metering functions in low-voltage devices, making it widely applicable to various monitoring systems.

5) Incorporates secure and reliable high-speed fieldbus technology, supporting dual networks and multiple fieldbus interfaces and communication protocols.

6) Designed with a sealed, reinforced unit chassis and multi-layer anti-vibration and anti-interference features, exceeding national standards in all performance indicators.

7) Stores 32 trip records, self-test records, and digital and status change records separately, while also recording all analog quantities and waveform changes at the moment of tripping, ensuring comprehensive process recording.

1.3 Basic Configuration
Protection Functions:
1. Three-stage overcurrent protection
2. Two-stage overvoltage anti-islanding protection
3. Two-stage undervoltage anti-islanding protection
4. Reverse power anti-islanding protection
5. Two-stage overfrequency anti-islanding protection
6. Two-stage underfrequency anti-islanding protection
7. Automatic closing under voltage presence
8. Undervoltage opening anti-islanding protection
9. Inrush current blocking
10. Abnormal switch position alarm
Measurement and Control Functions:
1. 8 channels of remote signal input collection and general accident soft remote signal
2. 6 channels of relay output control
3. Three-phase voltage, three-phase current, zero-sequence voltage, zero-sequence current, frequency
4. Supports switching between primary and secondary values of AC quantities via the reset key
5. Synchronous display of primary/secondary values in the inspection interface and event records
6. Synchronous display of remote signals in the inspection interface