nr2-630g-250 chint thermal overload relay, 160a to 250a rated current

Why Choose the CHINT NR2-630G-250 Thermal Overload Relay?

The CHINT NR2-630G-250 is a heavy-duty thermal overload relay designed to provide reliable overload and phase failure protection for high-power three-phase AC motors in industrial control systems. As part of the robust CHINT NR2 thermal overload relay series, it delivers adjustable current protection for large motor applications requiring dependable protection and long service life.

This relay uses an advanced three-phase bimetal thermal protection design with temperature compensation to ensure stable operation under changing load conditions. The NR2-630G-250 is designed for independent mounting applications and provides reliable integration into industrial motor starter assemblies and electrical control panels.

With an adjustable current setting range of 160 A to 250 A and a rated operational voltage of up to 690 V AC, the NR2-630G-250 is suitable for protecting large industrial motors used in pumps, compressors, conveyors and heavy machinery applications.

Key Advantages

• Heavy-duty thermal overload protection for large three-phase AC motors.
• 160 A to 250 A adjustable current range for flexible motor protection.
• Overload and phase loss protection helps prevent motor damage.
• Independent mounting design for large motor starter assemblies.
• Integrated manual and automatic reset functionality for operational flexibility.
• Temperature compensation improves tripping accuracy during varying ambient conditions.

Key Features

• CHINT NR2 thermal overload relay series.
• 160 A to 250 A adjustable overload setting.
• Three-phase bimetal thermal protection structure.
• Class 10A tripping characteristic.
• Integrated overload and phase loss protection.
• Manual and automatic reset selector.
• Trip indication for easier fault diagnosis.
• 1 NO + 1 NC electrically separated auxiliary contacts.

Reliable Motor Protection for Heavy Industrial Applications

Thermal overload relays such as the CHINT NR2-630G-250 protect high-power electric motors by monitoring current levels and disconnecting the motor control circuit when overload conditions occur. This helps reduce the risk of overheating, insulation damage and costly production downtime.

The NR2 series is designed for industrial automation engineers, panel builders and OEM manufacturers requiring reliable motor protection solutions for demanding applications. Its adjustable settings, diagnostic features and independent mounting capability allow straightforward integration into large motor control systems.

Typical Applications

• Large industrial pumps and water treatment systems.
• Heavy-duty conveyor and material handling equipment.
• Compressors and processing machinery.
• Industrial fans and ventilation systems.
• Manufacturing and production plants.
• Heavy industrial automation and OEM machinery.