chint nl1-63-225/300 25a 300ma 2 pole rcd 2 pole

Why Choose the Chint NL1-63-225/300 Residual Current Device?

The Chint NL1-63-225/300 is a dependable residual current device (RCD) designed to provide earth leakage protection in residential, commercial and light industrial electrical installations. As part of the Chint NL1 RCCB series, it automatically disconnects the circuit when residual current faults are detected, helping protect people, cables and equipment from electrical hazards.

This device is a 2 pole, AC type RCD suitable for detecting sinusoidal alternating residual currents. It is commonly used within consumer units, distribution boards and electrical control panels where reliable residual current protection is required without integrated over-current protection.

With a rated current of 25 A and a residual operating current of 300 mA, the NL1-63-225/300 is well suited to circuits requiring earth leakage protection for fire-risk reduction and installation safety. Its DIN rail mounting format enables quick, neat and secure installation in modern electrical enclosures.

Key Advantages

• Reliable 2 pole residual current device for earth leakage protection.
• 25 A rated current for low voltage electrical circuits.
• 300 mA residual operating current for leakage fault detection.
• AC type RCD for sinusoidal alternating residual current protection.
• DIN rail mounting for fast installation in consumer units and distribution boards.
• Helps reduce fire risks caused by insulation faults and earth leakage currents.

Key Features

• Chint NL1 series residual current circuit breaker.
• 25 A rated current.
• 300 mA residual operating current.
• 2 pole configuration.
• AC type tripping characteristic.
• Residual current protection without over-current protection.
• DIN rail mounting for modular electrical assemblies.
• Compliant with IEC / EN residual current protection standards.

Technical Specifications

• Manufacturer: Chint
• Series: NL1-63
• Model: NL1-63-225/300
• Product type: Residual current device / RCCB
• Number of poles: 2 pole
• Rated current: 25 A
• Residual operating current: 300 mA
• Tripping type: AC type
• Rated voltage: 230 V AC
• Rated frequency: 50 / 60 Hz
• Rated conditional short-circuit current: 6 kA
• Rated insulation voltage: 500 V
• Rated impulse withstand voltage: 4 kV
• Mounting type: 35 mm DIN rail
• Protection rating: IP20
• Operating temperature: approx. -25 to +70°C
• Standards: IEC / EN 61008-1

Reliable Earth Leakage Protection for Electrical Installations

Residual current devices such as the Chint NL1-63-225/300 monitor the difference between live and neutral current. If an imbalance is detected, the device disconnects the circuit to help reduce the risk of electric shock and fire hazards caused by insulation faults.

The NL1 series is designed for residual current protection only and should be used alongside suitable over-current protection, such as an MCB or fuse, where required. Its compact DIN rail design makes it suitable for consumer units, distribution boards and industrial electrical panels.

Typical Applications

• Consumer units and distribution boards.
• Residential electrical installations.
• Commercial building circuits.
• Light industrial power distribution.
• Earth leakage protection for final circuits.
• Electrical panels requiring separate residual current protection.

Trusted by Electrical Installers Worldwide

Chint residual current devices are widely used by electrical contractors, panel builders and maintenance engineers to provide dependable earth leakage protection in residential, commercial and industrial electrical systems.