The CHINT NXR Thermal Overload Relay is designed to protect three-phase AC motors from overload, phase loss, and current imbalance. It features a precision bimetal design, temperature compensation, and manual or automatic reset options to ensure reliable performance under variable operating conditions. With wide current adjustment ranges, trip indication, and easy plug-in installation with CHINT contactors, the NXR series delivers dependable protection for industrial automation, HVAC, and motor control systems.

• Compliance standard: IEC 60947-4-1 / GB 14048.4
• Rated frequency: 50 / 60 Hz
• Rated operational voltage (Ue): up to 690 V AC
• Current setting range: 0.1 A – 630 A (varies by model)
• Tripping class: Class 10A
• Protection functions: Overload protection, phase loss and phase imbalance detection, locked rotor protection
• Structure: Three-phase bimetallic elements with adjustable current dial
• Reset mode: Manual / automatic selectable
• Temperature compensation: Ensures precise operation under varying ambient temperatures
• Trip indicator: Mechanical flag for visual trip status
• Test and stop button: For on-site operation checks and circuit stop function
• Auxiliary contacts: 1 NO + 1 NC, electrically isolated
• Mounting type: Plug-in mounting with CHINT contactors or independent base mounting
• Mechanical life: ≥ 1,000,000 operations
• Electrical life: ≥ 100,000 operations
• Ambient temperature: −5 °C to +40 °C
• Storage temperature: −25 °C to +70 °C
• Altitude: ≤ 2000 m
• Relative humidity: ≤ 95% RH (non-condensing)
• Pollution degree: Class 3
• Protection degree: IP20 (when enclosed)
• Vibration resistance: ≤ 5.9 m/s²
• Accessories: Mounting base (MB1–MB4), interconnection kits, and extension wiring modules
• Compatible CHINT contactors: NC1, NC6, NC8, and NC2 series