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nm8-800s-4p-800a chint 800a 4p adjustable thermal & magnetic mccb
Chint NM8-800S-4P-800A 800A 4 pole adjustable thermal-magnetic moulded case circuit breaker with 50 kA breaking capacity for high-capacity industrial power distribution.
Why Choose the Chint NM8-800S-4P-800A Moulded Case Circuit Breaker?
The Chint NM8-800S-4P-800A is a heavy-duty 4 pole moulded case circuit breaker (MCCB) designed to provide dependable overload and short-circuit protection for high-capacity industrial and commercial power distribution systems. As part of the proven Chint NM8 Series, it combines robust construction with reliable switching and isolation performance for demanding low-voltage installations.
Featuring an adjustable thermal-magnetic trip unit, the NM8-800S allows engineers to tailor protection settings to suit the application. Its high current rating, strong breaking capacity and durable moulded case design make it ideal for main distribution boards, large switchgear assemblies and industrial electrical infrastructure.
With a rated current of 800 A, 4 pole configuration and a 50 kA breaking capacity, the NM8-800S-4P-800A is well suited to large three-phase systems requiring dependable circuit protection, neutral isolation and long service life.
Key Advantages
- Heavy-duty 4 pole moulded case circuit breaker.
- 800 A rated current for high-capacity power distribution.
- Adjustable thermal-magnetic protection for installation flexibility.
- 50 kA short-circuit breaking capacity for reliable fault interruption.
- Suitable for switching, isolation and circuit protection.
- Designed for dependable operation in demanding industrial environments.
Key Features
- Chint NM8 Series MCCB.
- 800 A rated current.
- 4 pole configuration.
- Adjustable thermal-magnetic trip unit.
- 50 kA rated breaking capacity.
- Rated operational voltage up to 690 V AC.
- Suitable for isolation in accordance with IEC requirements.
- Fixed mounting for industrial switchgear and distribution equipment.
Reliable Circuit Protection for High-Power Installations
The Chint NM8 Series is engineered to protect low-voltage electrical systems against overloads and short circuits while providing dependable switching and safe isolation. The adjustable thermal-magnetic release enables the breaker to be configured for the electrical characteristics of larger industrial installations.
The NM8-800S is suitable for manufacturing plants, infrastructure projects, utilities and large commercial buildings where high-current circuit protection and operational continuity are critical.
Typical Applications
- Main incoming distribution boards.
- Industrial switchgear assemblies.
- Large motor control centres.
- Commercial and industrial electrical installations.
- Manufacturing and processing facilities.
- Power distribution infrastructure.
Technical Specifications
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| Mounting Type | Fixed | |
|---|---|---|
| Application | Power distribution | |
| Current | 800 A | |
| Phase | Three Phase | |
| Poles | 4-pole | |
| Device Type | MCCB | |
| Breaking Capacity | 50 kA | |
| Trip Unit | Thermal-magnetic | |
| Manufacturer | Chint | |
| Series | NM8 | |
| Model | NM8-800S-4P-800A | |
| Product type | Moulded Case Circuit Breaker (MCCB) | |
| Rated current | 800 A | |
| Number of poles | 4 | |
| Trip unit | Adjustable thermal-magnetic | |
| Rated operational voltage | Up to 690 V AC | |
| Rated insulation voltage (Ui) | 800 V | |
| Rated impulse withstand voltage (Uimp) | 8 kV | |
| Breaking capacity | 50 kA | |
| Rated frequency | 50 / 60 Hz | |
| Standard | IEC/EN 60947-2 | |
| Mounting type | Fixed | |
| Frame size | NM8-800S |
Frequently Asked Questions
What is the Chint NM8-800S-4P-800A used for?
It provides overload, short-circuit and isolation protection for high-current industrial and commercial electrical distribution systems.
What is the rated current of this MCCB?
This breaker has a rated current of 800 A.
How many poles does this circuit breaker have?
The NM8-800S-4P-800A features a 4 pole configuration, making it suitable for three-phase systems requiring neutral isolation.
Does this breaker feature adjustable protection?
Yes. It incorporates an adjustable thermal-magnetic trip unit that allows protection settings to be matched to the installation.
Which standards does this MCCB comply with?
The breaker is manufactured in accordance with IEC/EN 60947-2 for low-voltage moulded case circuit breakers.
Trusted by Electrical Professionals Worldwide
Chint NM8 moulded case circuit breakers are widely used by panel builders, electrical contractors and industrial engineers to provide dependable protection for high-capacity low-voltage power distribution systems.
