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nm8s-800s-4p-800a chint 800a 4p electronic adjustable thermal & magnetic mccb
Chint NM8S-800S-4P-800A 800A 4 pole electronic moulded case circuit breaker with adjustable electronic trip unit for industrial and commercial low voltage power distribution.
£1,217.13
Why Choose the Chint NM8S-800S-4P-800A Electronic MCCB?
The Chint NM8S-800S-4P-800A is a high-capacity electronic moulded case circuit breaker (MCCB) designed to provide dependable overload and short-circuit protection for demanding low voltage electrical distribution systems. Featuring an adjustable electronic trip unit, it delivers accurate protection settings and reliable fault interruption for industrial and commercial power applications.
As part of the Chint NM8S Series, this MCCB is engineered for main incomers, distribution boards, feeder circuits and switchboard assemblies where high current capacity and precise protection coordination are essential. The electronic release allows engineers to adjust protection settings to suit the installation, helping improve selectivity and reduce unnecessary downtime.
With a 800A rated current, 4-pole configuration and 50kA breaking capacity, the NM8S-800S-4P-800A is ideal for three-phase systems requiring neutral switching. It provides reliable protection for manufacturing plants, commercial buildings, infrastructure projects and critical power distribution systems.
Key Advantages
- 800A rated current for high-capacity power distribution.
- 4-pole MCCB suitable for three-phase systems with neutral switching.
- Adjustable electronic trip unit for accurate protection coordination.
- 50kA breaking capacity for dependable short-circuit interruption.
- Supports improved selectivity across complex electrical installations.
- Suitable for industrial, commercial and infrastructure applications.
Key Features
- Chint NM8S Series electronic moulded case circuit breaker.
- 800A rated current.
- 4-pole construction.
- Adjustable electronic protection.
- 50kA rated ultimate breaking capacity.
- Rated operational voltage up to 690V AC.
- Fixed mounting for switchboards and distribution panels.
- Designed to IEC/EN 60947-2 standards.
Reliable Protection for High-Capacity Distribution Systems
The Chint NM8S-800S-4P-800A protects electrical installations by disconnecting circuits during overload and short-circuit fault conditions. Its adjustable electronic trip unit enables accurate protection settings, helping engineers improve discrimination and coordination across large low voltage distribution networks.
The 4-pole configuration allows all three phases and the neutral conductor to be switched together, making it suitable for applications where complete circuit isolation and enhanced operational safety are required.
Typical Applications
- Main incoming electrical supplies.
- Industrial switchboards.
- Commercial distribution boards.
- Manufacturing and processing facilities.
- Infrastructure and utilities.
- High-capacity feeder circuit protection.
Technical Specifications
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| Trip Unit | LSI | |
|---|---|---|
| Mounting Type | Fixed | |
| Application | Power distribution | |
| Current | 800 A | |
| Phase | Three Phase | |
| Poles | 4-pole | |
| Device Type | MCCB | |
| Breaking Capacity | 50 kA | |
| Manufacturer | Chint | |
| Series | NM8S Electronic MCCB | |
| Model | NM8S-800S-4P-800A | |
| Product type | Electronic moulded case circuit breaker | |
| Rated current | 800A | |
| Frame size | 800S | |
| Number of poles | 4 Pole | |
| Trip unit | Adjustable electronic release | |
| Rated operational voltage | Up to 690V AC | |
| Rated insulation voltage | 800V | |
| Rated impulse withstand voltage | 8kV | |
| Breaking capacity | 50kA | |
| Frequency | 50 / 60Hz | |
| Mounting type | Fixed installation | |
| Protection functions | Overload and short-circuit protection | |
| Standard | IEC/EN 60947-2 |
Frequently Asked Questions
What is the Chint NM8S-800S-4P-800A used for?
It provides overload and short-circuit protection for high-capacity industrial and commercial low voltage electrical distribution systems.
What is the rated current of this MCCB?
The NM8S-800S-4P-800A has a 800A rated current.
Why does this breaker have four poles?
The 4-pole configuration allows all three phases and the neutral conductor to be switched together, making it suitable for installations requiring complete isolation.
What type of trip unit does this MCCB use?
This breaker uses an adjustable electronic trip unit, allowing accurate and flexible protection settings.
Where is this breaker typically installed?
It is commonly installed in industrial switchboards, commercial distribution panels, infrastructure projects and high-capacity feeder circuits.
Trusted by Electrical Professionals Worldwide
Chint NM8S electronic MCCBs are trusted by electrical engineers, contractors and panel builders for dependable high-current circuit protection, adjustable electronic trip settings and reliable long-term performance in demanding low voltage power distribution systems.
