chint nl1-63-463/300-a 63a 300ma 4 pole rcd 4 pole

Why Choose the Chint NL1-63-463/300-A Residual Current Device?

The Chint NL1-63-463/300-A is a high-performance Type A residual current device (RCD) designed to provide dependable earth leakage protection in commercial, industrial and three-phase electrical installations. As part of the Chint NL1 RCCB series, it disconnects the circuit whenever residual current faults are detected, helping protect people, equipment and property from electric shock and fire hazards.

This device is a 4 pole, Type A RCD capable of detecting both sinusoidal AC residual currents and pulsating DC residual currents, making it suitable for modern electrical installations that incorporate electronic equipment, variable speed drives, EV charging equipment and switched-mode power supplies.

With a rated current of 63 A and a residual operating current of 300 mA, the NL1-63-463/300-A provides dependable earth leakage protection for three-phase circuits where additional fire protection is required. Its compact DIN rail mounting design enables straightforward installation within modern distribution boards and control panels.

Key Advantages

• Reliable 4 pole Type A residual current device for three-phase electrical systems.
• 63 A rated current for commercial and industrial applications.
• 300 mA residual operating current for earth leakage and fire protection.
• Type A protection detects AC and pulsating DC residual currents.
• DIN rail mounting for quick installation in distribution boards.
• Suitable for installations containing electronic loads and modern power conversion equipment.

Key Features

• Chint NL1 Type A residual current circuit breaker.
• 63 A rated current.
• 300 mA residual operating current.
• 4 pole configuration.
• Type A tripping characteristic.
• Residual current protection without over-current protection.
• 35 mm DIN rail mounting.
• Manufactured in accordance with IEC / EN 61008-1.

Technical Specifications

• Manufacturer: Chint
• Series: NL1-63
• Model: NL1-63-463/300-A
• Product type: Residual current device / RCCB
• Number of poles: 4 pole
• Rated current: 63 A
• Residual operating current: 300 mA
• Tripping type: Type A
• Rated voltage: 400 / 415 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
• Standards: IEC / EN 61008-1

Advanced Type A Protection for Modern Installations

Unlike standard AC type RCDs, the Chint NL1-63-463/300-A detects both alternating residual currents and pulsating DC residual currents generated by many modern electronic devices. This makes it particularly suitable for installations containing inverters, variable speed drives, EV charging equipment and electronic power supplies.

The NL1 series provides residual current protection only and should always be installed alongside suitable over-current protection such as an MCB or fuse. Its compact DIN rail construction makes it suitable for commercial buildings, industrial facilities and machinery installations.

Typical Applications

• Three-phase distribution boards.
• Commercial electrical installations.
• Industrial power distribution.
• Variable speed drive installations.
• EV charging infrastructure.
• Control panels and switchboards with electronic equipment.

Trusted by Electrical Professionals Worldwide

Chint Type A residual current devices are trusted by electrical contractors, panel builders and maintenance engineers for dependable earth leakage protection across commercial, industrial and modern electronic installations.