NR-630 Microcomputer Protection and Control Device

NARI Electric NR-630 Feeder Protection and Control Device

1. Scope of Application

The NR-630 microcomputer-based protection and control device is suitable for small current grounding systems with voltage levels of 66kV and below. Based on a universal design concept with reasonable functional configuration, this product can be used for general protection of incoming lines, outgoing lines, plant transformers, motors, and capacitors. Equipped with a large color LCD screen and integrated temperature and humidity sensors, it features high integration, comprehensive protection configuration, strong anti-interference capability, and resistance to harsh environments, making it particularly suitable for direct decentralized installation on switchgear. Cutout dimensions: 176*166*99 (width*height*depth).

2. Model Description

NR-630 Microcomputer Protection and Control Device: Incoming line cabinet, feeder cabinet protection

NR-631 Microcomputer Protection and Control Device: Dual power incoming line cabinet protection and automatic switching

NR-632 Microcomputer Protection and Control Device: Dual power incoming line cabinet protection with automatic switching for sectionalizing switches

NR-633 Microcomputer Protection and Control Device: PT cabinet, monitoring and paralleling of two sets of PTs

3. Rated Electrical Parameters

Operating Power Supply: AC/DC 85~242V

Rated Voltage: 100V

Rated Frequency: 50Hz

Rated Current: 5A, 1A (customized)

4. Operating Environmental Conditions

Ambient Temperature: -30~+55°C

Relative Humidity: Not exceeding 95%, no condensation

Atmospheric Pressure: 80~110kPa

Other Conditions: The air around the device should not contain acidic or alkaline corrosive substances, and lightning, rain, and snow protection facilities should be available

Standard Atmospheric Conditions for Testing: Temperature +15~+35°C, Humidity 45%~75%, Pressure 86~106kPa