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nr2-630g-400 chint thermal overload relay, 250a to 400a rated current
CHINT NR2-630G-400 thermal overload relay with adjustable 250 A to 400 A current setting designed for high-current three phase motor overload and phase failure protection.
£313.11
Why Choose the CHINT NR2-630G-400 Thermal Overload Relay?
The CHINT NR2-630G-400 is a heavy-duty thermal overload relay designed to provide reliable overload and phase failure protection for high-current three-phase AC motors in industrial control and automation systems. As part of the powerful CHINT NR2 thermal overload relay series, it delivers adjustable motor protection for demanding industrial applications requiring dependable operation and long service life.
This relay features a robust three-phase bimetal thermal protection design with temperature compensation to maintain accurate tripping performance under changing operating conditions. The NR2-630G-400 is designed for independent mounting and integration with large CHINT motor starter assemblies, providing reliable protection for high-power industrial machinery.
With an adjustable current setting range of 250 A to 400 A and a rated insulation voltage of 690 V AC, the NR2-630G-400 is suitable for protecting large industrial motors used in pumps, compressors, conveyors, processing equipment and heavy manufacturing systems.
Key Advantages
- Heavy-duty thermal overload protection for large three-phase AC motors.
- 250 A to 400 A adjustable current range for flexible motor protection settings.
- Overload and phase failure protection helps prevent motor damage.
- Designed for integration with CHINT NC2 series contactors and motor starters.
- Independent mounting design for large industrial control assemblies.
- Temperature compensation improves protection stability in varying environments.
Key Features
- CHINT NR2 thermal overload relay series.
- 250 A to 400 A adjustable overload current setting.
- Three-phase bimetal thermal protection structure.
- Class 10A tripping characteristic.
- Integrated overload and phase loss protection.
- Manual and automatic reset functionality.
- Built-in TEST and STOP buttons.
- 1 NO + 1 NC electrically separated auxiliary contacts.
Reliable Motor Protection for Heavy Industrial Applications
Thermal overload relays such as the CHINT NR2-630G-400 protect high-power electric motors by monitoring current levels and disconnecting the motor control circuit when overload conditions occur. This helps reduce overheating, motor damage and unexpected production downtime.
The NR2 series is designed for industrial automation engineers, panel builders and OEM manufacturers requiring dependable motor protection solutions for high-current applications. Its adjustable settings, diagnostic features and independent mounting capability allow straightforward integration into large electrical systems.
Typical Applications
- Large industrial pumps and water treatment systems.
- Heavy-duty conveyor and material handling equipment.
- Compressors and industrial processing machinery.
- Manufacturing and production plants.
- Large HVAC and ventilation systems.
- Heavy industrial automation and OEM machinery.
Technical Specifications
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| Mounting Type | Separate (panel / DIN rail) | |
|---|---|---|
| Device Type | Thermal Overload Relay | |
| Current Range | 250–400 A | |
| Trip Class | Class 10A | |
| Reset Type | Manual / Automatic | |
| Manufacturer | CHINT | |
| Series | NR2 Thermal Overload Relay | |
| Model | NR2-630G-400 | |
| Product type | Thermal overload relay | |
| Current adjustment range | 250 A to 400 A | |
| Rated operational voltage | Up to 690 V AC | |
| Rated insulation voltage | 690 V AC | |
| Frequency | 50 / 60 Hz | |
| Tripping class | Class 10A | |
| Protection functions | Overload and phase failure protection | |
| Auxiliary contacts | 1 NO + 1 NC electrically separated | |
| Reset mode | Manual / automatic selectable | |
| Mounting type | Independent mounting | |
| Protection rating | IP20 when enclosed | |
| Compliance standard | IEC/EN 60947-4-1 |
Frequently Asked Questions
What is the CHINT NR2-630G-400 used for?
The CHINT NR2-630G-400 is used to protect high-current three-phase AC motors against overload conditions and phase failure in industrial motor control systems.
What current range does the NR2-630G-400 support?
The relay supports an adjustable current range of 250 A to 400 A for large motor protection applications.
What voltage rating does this overload relay support?
The NR2-630G-400 supports operation in systems up to 690 V AC and is suitable for industrial motor control circuits.
What protection features are included?
The relay provides thermal overload protection, phase failure protection, temperature compensation, trip indication and adjustable reset functionality.
How is the NR2-630G-400 installed?
The relay is designed for independent mounting within large industrial motor starter assemblies and electrical control panels.
Trusted by Industrial Control Engineers Worldwide
CHINT NR2 thermal overload relays are widely used in industrial motor control systems to provide reliable protection, efficient operation and dependable performance in demanding automation equipment.
