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NL1-63-425/300-A Chint 25A 300mA 4 Pole RCD
Chint NL1-63-425/300 residual current device, a 25 A 300 mA 4 pole AC type RCCB designed for earth leakage protection in three-phase electrical installations.
£35.78
Why Choose the Chint NL1-63-425/300 Residual Current Device?
The Chint NL1-63-425/300 is a dependable residual current device (RCD) designed to provide earth leakage protection in commercial, industrial and three-phase electrical installations. As part of the Chint NL1 RCCB series, it automatically disconnects the circuit when residual current faults are detected, helping protect people, equipment and property from electrical hazards.
This device is a 4 pole, AC type RCD suitable for detecting sinusoidal alternating residual currents. It is commonly installed in distribution boards, industrial control panels and three-phase electrical systems 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 NL1-63-425/300 is well suited to three-phase 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 4 pole residual current device for three-phase electrical systems.
- 25 A rated current for commercial and industrial installations.
- 300 mA residual operating current for earth leakage and fire protection.
- AC type RCD for sinusoidal alternating residual current detection.
- DIN rail mounting for straightforward installation.
- Provides dependable residual current protection without over-current protection.
Key Features
- Chint NL1 series residual current circuit breaker.
- 25 A rated current.
- 300 mA residual operating current.
- 4 pole configuration.
- AC type tripping characteristic.
- Residual current protection only.
- 35 mm DIN rail mounting.
- Manufactured in accordance with IEC / EN 61008-1.
Reliable Earth Leakage Protection for Three-Phase Installations
Residual current devices such as the Chint NL1-63-425/300 continuously monitor current balance across all live conductors and the neutral conductor. When an earth leakage fault occurs, the device disconnects the circuit rapidly to help reduce the risk of electric shock and electrical fires caused by insulation failure.
The NL1 series provides residual current protection only and should be installed alongside suitable over-current protection such as an MCB or fuse. Its compact DIN rail format makes it suitable for commercial buildings, industrial facilities and machinery installations.
Typical Applications
- Three-phase distribution boards.
- Commercial electrical installations.
- Industrial power distribution.
- Motor control and machinery panels.
- Control panels and switchboards.
- Electrical systems requiring dedicated earth leakage protection.
Technical Specifications
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| Current | 25 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 4-pole | |
| Device Type | RCD | |
| Residual Current | 300 mA | |
| Manufacturer | Chint | |
| Series | NL1-63 | |
| Model | NL1-63-425/300 | |
| Product type | Residual current device / RCCB | |
| Number of poles | 4 pole | |
| Rated current | 25 A | |
| Residual operating current | 300 mA | |
| Tripping type | AC type | |
| Rated voltage | 400 / 415 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Rated conditional short-circuit current | 6 kA | |
| Rated conditional residual short-circuit current | 6 kA | |
| Rated insulation voltage | 500 V | |
| Rated impulse withstand voltage | 4 kV | |
| Mounting type | 35 mm DIN rail | |
| Connection type | Cable or busbar connection | |
| Protection rating | IP20 | |
| Operating temperature | approx. -25 to +70°C | |
| Standards | IEC / EN 61008-1 |
Frequently Asked Questions
What is the Chint NL1-63-425/300 used for?
The Chint NL1-63-425/300 provides residual current protection by disconnecting the circuit whenever earth leakage faults are detected.
What current rating does this RCD have?
The Chint NL1-63-425/300 has a rated current of 25 A.
What residual current sensitivity does it provide?
This RCCB has a residual operating current of 300 mA.
How many poles does the NL1-63-425/300 have?
The device features a 4 pole configuration, making it suitable for three-phase electrical systems with neutral disconnection.
Does this RCD provide over-current protection?
No. The NL1-63-425/300 provides residual current protection only and should always be installed with suitable over-current protection.
Trusted by Electrical Professionals Worldwide
Chint residual current devices are trusted by electrical contractors, panel builders and maintenance engineers for dependable earth leakage protection across commercial, industrial and residential electrical installations.
