nr2-93-40 chint thermal overload relay, 30a to 40a rated current

Why Choose the CHINT NR2-93-40 Thermal Overload Relay?

The CHINT NR2-93-40 is a high-performance thermal overload relay engineered to protect three-phase AC motors against overload, phase failure and excessive current conditions in industrial automation systems. As part of the proven CHINT NR2 thermal overload relay series, this relay delivers dependable motor protection for machinery, production equipment and industrial control panels.

Built with a precision three-phase bimetal tripping mechanism, the NR2-93-40 continuously monitors motor current and disconnects the circuit when abnormal operating conditions occur. Integrated temperature compensation, phase loss sensitivity and selectable reset functionality help improve protection accuracy while reducing downtime and motor damage.

With an adjustable current range of 30 A to 40 A, the NR2-93-40 is suitable for medium to large industrial motors used in pumps, compressors, conveyors, ventilation systems and manufacturing 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 30 A to 40 A.
• Compatible with CHINT NC1, NC6 and NC7 contactor series.
• Integrated manual and automatic reset operation.
• Compact construction for industrial motor control panels.
• Temperature compensated tripping improves protection stability.

Key Features

• CHINT NR2 thermal overload relay series.
• 30 A to 40 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.
• Plug-in mounting onto compatible CHINT contactors.

Technical Specifications

• Manufacturer: CHINT
• Series: NR2 Thermal Overload Relay
• Model: NR2-93-40
• Product type: Thermal overload relay
• Current adjustment range: 30 A to 40 A
• Rated operational voltage: Up to 690 V AC
• Frequency: 50 / 60 Hz
• Tripping class: Class 10A
• Protection functions: Overload and phase failure protection
• Auxiliary contacts: 1 NO + 1 NC electrically isolated
• Reset mode: Manual / Automatic selectable
• Mounting type: Plug-in mounting
• Protection rating: IP20 when enclosed
• Mechanical life: ≥ 1,000,000 operations
• Electrical life: ≥ 100,000 operations
• Compliance standards: IEC/EN 60947-4-1

Reliable Protection for Industrial Motor Applications

Thermal overload relays are essential components for protecting electric motors against overheating caused by excessive current draw, phase imbalance or mechanical overload. The CHINT NR2-93-40 continuously monitors motor current and trips the associated contactor when unsafe operating conditions are detected.

The NR2 series is widely used in industrial automation systems, OEM machinery and motor control centres where dependable motor protection and compact installation are essential. Its plug-in mounting configuration simplifies panel assembly and maintenance operations.

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.