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nr2-25-8 chint thermal overload relay, 5.50a to 8.00a rated current
CHINT NR2-25-8 thermal overload relay with adjustable 5.5 A to 8 A current setting designed for three phase motor overload and phase failure protection.
£11.79
Why Choose the CHINT NR2-25-8 Thermal Overload Relay?
The CHINT NR2-25-8 is a reliable thermal overload relay designed to provide effective overload and phase failure protection for three-phase AC motors in industrial control and automation systems. As part of the proven CHINT NR2 thermal overload relay series, it delivers adjustable current protection and dependable motor safeguarding for contactor-based motor starter assemblies.
This relay features a three-phase bimetal thermal protection structure with temperature compensation to maintain accurate operation under varying ambient conditions. The compact design, integrated test functions and selectable reset modes make the NR2-25-8 suitable for use in electrical control panels and industrial machinery applications.
With an adjustable current setting range of 5.5 A to 8 A and a rated insulation voltage of 690 V AC, the NR2-25-8 is ideal for protecting small industrial motors used in pumps, conveyors, fans, compressors and production equipment.
Key Advantages
- Reliable thermal overload and phase failure protection for three-phase motors.
- 5.5 A to 8 A adjustable current range for flexible motor protection.
- Compatible with CHINT NC1 contactor series for compact motor starter solutions.
- Integrated manual and automatic reset operation for application flexibility.
- Temperature compensated tripping improves protection accuracy.
- Compact construction simplifies installation in industrial control panels.
Key Features
- CHINT NR2 thermal overload relay series.
- 5.5 A to 8 A adjustable overload setting.
- Three-phase thermal bimetal protection design.
- Class 10A tripping characteristic.
- Integrated overload and phase loss protection.
- Manual and automatic reset selector.
- Built-in STOP and TEST push buttons.
- 1 NO + 1 NC auxiliary contacts.
Reliable Motor Protection for Industrial Systems
Thermal overload relays such as the CHINT NR2-25-8 protect electric motors by monitoring current levels and disconnecting the motor circuit when overload conditions occur. This helps prevent overheating, winding damage and unexpected equipment downtime.
The NR2 series is designed for industrial automation engineers, panel builders and OEM manufacturers requiring dependable motor protection, simple installation and compatibility with modern contactor-based control systems.
Typical Applications
- Industrial pumps and water handling systems.
- Conveyor and material handling equipment.
- Fans and ventilation systems.
- Compressors and mechanical machinery.
- Manufacturing and production equipment.
- Industrial automation and OEM machine building.
Technical Specifications
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| Mounting Type | Direct mount on contactor | |
|---|---|---|
| Device Type | Thermal Overload Relay | |
| Current Range | 5.5–8 A | |
| Trip Class | Class 10A | |
| Reset Type | Manual / Automatic | |
| Manufacturer | CHINT | |
| Series | NR2 Thermal Overload Relay | |
| Model | NR2-25-8 | |
| Product type | Thermal overload relay | |
| Current adjustment range | 5.5 A to 8 A | |
| 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 | |
| Reset mode | Manual / automatic selectable | |
| Mounting type | Direct contactor mounting | |
| Protection rating | IP20 when installed | |
| Compliance standards | IEC/EN 60947-4-1 |
Frequently Asked Questions
What is the CHINT NR2-25-8 used for?
The CHINT NR2-25-8 is used to protect three-phase AC motors against overload conditions and phase failure in industrial motor control applications.
What current range does the NR2-25-8 support?
The relay supports an adjustable current range of 5.5 A to 8 A for motor protection settings.
What voltage rating does this overload relay support?
The NR2-25-8 has a rated insulation voltage of 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 and adjustable reset functionality.
How is the NR2-25-8 installed?
The relay is typically mounted directly onto compatible CHINT contactors to create a compact motor starter assembly.
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 automation equipment.
