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nr2-25-18 chint thermal overload relay, 12a to 18a rated current
CHINT NR2-25-18 thermal overload relay with a 12.00–18.00 A adjustable current range designed for three-phase AC motor overload and phase-loss protection.
£11.79
Why Choose the CHINT NR2-25-18 Thermal Overload Relay?
The CHINT NR2-25-18 is a reliable thermal overload relay designed to provide overload and phase-loss protection for three-phase AC motors in industrial motor control and automation applications. As part of the trusted CHINT NR2 thermal overload relay series, it provides adjustable motor protection and dependable operation when integrated with compatible contactor assemblies.
This relay uses a three-phase bimetal thermal protection structure to monitor motor current and trip the control circuit when excessive load conditions occur. The NR2 series includes features such as temperature compensation, trip indication, test functionality and manual/automatic reset selection to support reliable industrial operation.
With an adjustable current range of 12.00–18.00 A, the CHINT NR2-25-18 is suitable for protecting three-phase motors used in machinery, pumps, conveyors and industrial control systems. It is designed for compact motor starter assemblies with compatible CHINT contactors.
Key Advantages
- Reliable thermal overload protection for three-phase AC motors.
- 12.00–18.00 A adjustable current range for accurate motor protection.
- Provides protection against motor overload and phase-loss conditions.
- Compatible with CHINT NC1 series contactors.
- Compact design for efficient motor starter installations.
- Suitable for industrial automation and electrical control applications.
Key Features
- CHINT NR2 thermal overload relay series.
- 12.00–18.00 A adjustable thermal setting range.
- Three-phase bimetal overload protection.
- 10A trip class.
- Integrated phase-loss protection.
- Temperature compensation for stable tripping performance.
- Manual and automatic reset selector.
- Trip indicator with test and stop buttons.
- 1 NO + 1 NC electrically separated auxiliary contacts.
Reliable Motor Protection for Industrial Control
Thermal overload relays such as the CHINT NR2-25-18 protect motors by detecting sustained overcurrent conditions and disconnecting the motor control circuit before overheating can occur. This helps improve equipment reliability and reduce the risk of motor failure in industrial applications.
The NR2 series is designed for electrical engineers, machine builders and automation professionals requiring dependable motor protection with adjustable settings, compact installation and straightforward integration into motor starter systems.
Typical Applications
- Industrial motor starter assemblies.
- Conveyors and material handling systems.
- Pumps and compressor equipment.
- Fans and ventilation systems.
- Production and processing machinery.
- OEM automation control panels.
Technical Specifications
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| Mounting Type | Direct mount on contactor | |
|---|---|---|
| Device Type | Thermal Overload Relay | |
| Current Range | 12–18 A | |
| Compatible With | NC1 | |
| Trip Class | Class 10A | |
| Poles | 3-pole | |
| Manufacturer | CHINT | |
| Series | NR2 Thermal Overload Relay | |
| Model | NR2-25-18 | |
| Product type | Thermal overload relay | |
| Current setting range | 12.00–18.00 A | |
| Frame size | NR2-25 | |
| Protection type | Overload and phase-loss protection | |
| Rated frequency | 50 / 60 Hz | |
| Rated operational voltage | Up to 690 V AC | |
| Rated insulation voltage | 690 V | |
| Trip class | 10A | |
| Number of poles | 3 | |
| Mounting type | Plug-in mounting | |
| Compatible contactors | CHINT NC1 series | |
| Auxiliary contacts | 1 NO + 1 NC | |
| Compliance standard | IEC/EN 60947-4-1 |
Frequently Asked Questions
What is the CHINT NR2-25-18 used for?
The CHINT NR2-25-18 is a thermal overload relay used to protect three-phase AC motors from overload and phase-loss conditions.
What current range does the NR2-25-18 support?
The relay has an adjustable current setting range of 12.00–18.00 A.
What protection does this overload relay provide?
The relay provides thermal overload protection and phase-loss protection for industrial motor applications.
Which contactors is the NR2-25-18 compatible with?
The NR2-25-18 is designed for use with compatible CHINT contactors including the NC1 series.
What reset modes are available?
The NR2 series supports manual and automatic reset operation for flexible motor control system designs.
Trusted by Industrial Control Engineers
CHINT NR2 thermal overload relays provide reliable motor protection solutions for industrial automation, motor starters and electrical control systems worldwide.
