nr2-25-25 chint thermal overload relay, 17a to 25a rated current

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

The CHINT NR2-25-25 is a durable and highly reliable thermal overload relay engineered to protect three-phase AC motors against overload, stalled rotor and phase failure conditions in industrial automation systems. As part of the proven CHINT NR2 thermal overload relay series, this device is designed for dependable motor protection in demanding industrial and OEM applications.

Featuring a precision bimetal thermal tripping mechanism, the NR2-25-25 continuously monitors motor current and disconnects the circuit when abnormal operating conditions occur. Integrated phase loss sensitivity and temperature compensation improve protection accuracy and help reduce equipment downtime and motor damage.

With an adjustable current range of 17 A to 25 A, the NR2-25-25 is ideal for medium-sized industrial motors used in pumps, compressors, conveyors, fans and process machinery. The relay is designed for direct mounting onto compatible CHINT contactors, enabling compact and efficient motor starter assemblies.

Key Advantages

• Reliable thermal overload and phase failure protection.
• Adjustable current range from 17 A to 25 A.
• Compatible with CHINT NC1 contactor series.
• Integrated manual and automatic reset operation.
• Compact construction for industrial control panels.
• Temperature compensated tripping improves operational stability.

Key Features

• CHINT NR2 thermal overload relay series.
• 17 A to 25 A adjustable overload 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 CHINT contactors.

Technical Specifications

• Manufacturer: CHINT
• Series: NR2 Thermal Overload Relay
• Model: NR2-25-25
• Product type: Thermal overload relay
• Current adjustment range: 17 A to 25 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

Dependable Protection for Industrial Motor Systems

Thermal overload relays are essential components for protecting electric motors against overheating caused by overload conditions, excessive current draw or phase imbalance. The CHINT NR2-25-25 continuously monitors motor current and trips the connected contactor when unsafe operating conditions are detected.

The NR2 series is widely used in industrial automation systems, OEM machinery and motor control centres where reliable motor protection and compact installation are critical. Its direct mounting design simplifies panel construction and ongoing maintenance.

Typical Applications

• Industrial motor starter assemblies.
• Conveyor and material handling systems.
• Pumps, compressors and ventilation equipment.
• Manufacturing and processing machinery.
• HVAC motor protection systems.
• OEM automation and industrial control applications.

Trusted by Industrial Engineers Worldwide

CHINT NR2 thermal overload relays are widely used in industrial automation and machinery applications to provide dependable overload protection and reliable long-term motor performance.