nr2-25-8 chint thermal overload relay, 5.50a to 8.00a rated current

Why Choose the CHINT NR2-25-8 Thermal Overload Relay?

The CHINT NR2-25-8 is a high-performance thermal overload relay developed to protect three-phase AC motors from overload, stalled rotor and phase failure conditions in industrial automation systems. As part of the robust CHINT NR2 overload relay series, this device delivers dependable motor protection for machinery, process equipment and motor starter assemblies.

Using a precision bimetal thermal tripping mechanism, the NR2-25-8 provides accurate overload detection and stable long-term performance under demanding operating conditions. Its adjustable current range and integrated phase failure sensitivity help improve motor safety while reducing maintenance costs and unplanned downtime.

With an adjustable current setting range of 5.5 A to 8 A, the NR2-25-8 is suitable for industrial motors used in pumps, compressors, conveyors, fans and manufacturing equipment. The relay is designed for direct installation onto compatible CHINT contactors, simplifying control panel assembly and maintenance.

Key Advantages

• Reliable thermal overload and phase failure protection.
• Adjustable overload current range from 5.5 A to 8 A.
• Compatible with CHINT NC1 contactor series.
• Integrated manual and automatic reset operation.
• Compact construction for industrial control panels.
• Temperature compensated tripping for improved stability.

Key Features

• CHINT NR2 thermal overload relay series.
• 5.5 A to 8 A adjustable current setting.
• Three-phase thermal bimetal protection.
• Integrated phase loss sensitivity.
• STOP and TEST push buttons.
• Manual and automatic reset selector.
• 1 NO + 1 NC auxiliary contacts.
• Direct mounting onto compatible contactors.

Technical Specifications

• 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

Reliable Motor Protection for Industrial Systems

Thermal overload relays are essential for protecting motors against overheating caused by overload conditions, mechanical jams or phase imbalance. The CHINT NR2-25-8 continuously monitors motor current and disconnects the circuit when unsafe operating conditions are detected.

The NR2 series is widely used in industrial motor starter assemblies and automation systems where dependable motor protection is critical. Its compact dimensions and direct contactor mounting design make installation straightforward for panel builders and OEM machinery manufacturers.

Typical Applications

• Industrial motor starter panels.
• Conveyors and material handling systems.
• Pumps, compressors and blower systems.
• HVAC and ventilation equipment.
• Manufacturing and processing machinery.
• OEM automation and control systems.

Trusted by Industrial Engineers Worldwide

CHINT NR2 thermal overload relays are widely used in industrial automation and motor control systems to deliver reliable overload protection and dependable long-term motor performance.