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Chint NM8L-250S-4P-250A-X1-T1 RCD – 4P – 250A – 50kA
Chint NM8L-250S-4P-250A-X1-T1 250A 4 pole moulded case circuit breaker with integrated residual current protection for industrial and commercial power distribution.
Why Choose the Chint NM8L-250S-4P-250A-X1-T1 MCCB with Residual Current Protection?
The Chint NM8L-250S-4P-250A-X1-T1 is a premium moulded case circuit breaker (MCCB) with integrated residual current protection (RCD/ELCB), engineered to provide comprehensive protection against overloads, short circuits and earth leakage faults in low voltage electrical installations. Combining circuit breaker and residual current protection into a single unit simplifies installation while enhancing electrical safety.
As part of the reliable Chint NM8L Series, this MCCB features an adjustable thermal magnetic trip unit with integrated RCD functionality, allowing flexible protection settings to suit a wide range of commercial and industrial applications. Its robust construction and dependable performance make it suitable for demanding power distribution environments.
With a 250A rated current, 4-pole configuration and 50kA breaking capacity, the NM8L-250S-4P-250A-X1-T1 is ideal for protecting three-phase electrical systems where neutral isolation is required, including switchboards, distribution panels, manufacturing facilities and critical infrastructure.
Key Advantages
- Integrated MCCB and residual current protection within one compact device.
- 250A rated current for high-capacity power distribution.
- 4-pole design providing phase and neutral switching.
- 50kA breaking capacity for dependable fault interruption.
- Protects against overloads, short circuits and earth leakage faults.
- Adjustable protection characteristics for improved system coordination.
Key Features
- Chint NM8L Series MCCB with integrated RCD.
- 250A rated current.
- 4-pole construction.
- Adjustable thermal magnetic trip unit.
- Integrated residual current protection module.
- 50kA breaking capacity.
- Suitable for fixed installation in switchboards and distribution panels.
- Designed in accordance with IEC/EN 60947-2.
Reliable Protection for Industrial Power Distribution
The Chint NM8L-250S-4P-250A-X1-T1 provides dependable protection for low voltage distribution systems by automatically disconnecting electrical circuits during overload, short-circuit and earth leakage conditions. This helps safeguard personnel, minimise equipment damage and reduce downtime.
Its integrated residual current functionality removes the need for separate earth leakage devices in many installations, helping reduce panel space while maintaining high levels of electrical protection for industrial and commercial power systems.
Typical Applications
- Industrial switchboards.
- Commercial distribution boards.
- Manufacturing facilities.
- Building services installations.
- Infrastructure and utilities.
- Three-phase machinery and power distribution systems.
Technical Specifications
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| Mounting Type | Fixed | |
|---|---|---|
| Application | Power distribution | |
| Trip Unit | Thermal-magnetic | |
| Device Type | MCCB + RCD | |
| Current | 250 A | |
| Phase | Three Phase | |
| Poles | 4-pole | |
| Breaking Capacity | 50 kA | |
| Manufacturer | Chint | |
| Series | NM8L | |
| Model | NM8L-250S-4P-250A-X1-T1 | |
| Product type | MCCB with integrated residual current protection | |
| Rated current | 250A | |
| Frame size | 250S | |
| Number of poles | 4 Pole | |
| Trip unit | Adjustable thermal magnetic with RCD | |
| Breaking capacity | 50kA | |
| Rated operational voltage | Up to 690V AC | |
| Frequency | 50 / 60 Hz | |
| Mounting type | Fixed installation | |
| Protection functions | Overload, short circuit and earth leakage protection | |
| Standard | IEC/EN 60947-2 |
Frequently Asked Questions
What is the Chint NM8L-250S-4P-250A-X1-T1 used for?
It provides overload, short-circuit and residual current protection for commercial and industrial low voltage electrical distribution systems.
What is the rated current of this MCCB?
This model has a 250A rated current.
Why does this breaker have four poles?
The 4-pole configuration allows all three phases and the neutral conductor to be switched and protected where required.
Does this breaker include earth leakage protection?
Yes. It incorporates integrated residual current protection to detect earth leakage faults and disconnect the circuit when necessary.
Where is this breaker typically installed?
It is commonly installed in industrial switchboards, commercial distribution panels, machinery control systems and other low voltage electrical installations.
Trusted by Electrical Professionals Worldwide
The Chint NM8L Series is trusted by electrical contractors, panel builders and industrial engineers for reliable circuit protection, integrated residual current protection and dependable long-term performance.
