The Chint NXR-25 12-18A is a thermal overload relay specifically designed to protect AC motors from overload and phase failure, with a continuously adjustable current setting range of 12 to 18 Amperes. This relay is part of the NXR series of protective devices and is typically mounted directly on compatible Chint contactors. Specifications
Current Setting Range: 12 A to 18 A (continuously adjustable)
Rated Operating Voltage (Ue) Up to 690 VAC
Frequency: 50/60 Hz
Number of Poles: 3
Auxiliary Contacts: 1 NO + 1 NC (Normally Open + Normally Closed), electrically separate
Thermal Overload Class: 10 A
Standard Compliance: IEC/EN 60947-4-1, IEC/EN 60947-5-1
Mounting: Can be connected directly to a Chint NXC contactor (e.g., NXC-09, NXC-12, NXC-18) or installed separately
IP Rating: IP20
Features: The Chint NXR-25 includes several features designed for reliable motor protection in industrial applications:Overload and Phase Failure Protection: Uses a bimetallic element to detect overcurrent and phase loss conditions, automatically disconnecting the motor. Control circuit to protect the motor.Temperature Compensation: Ensures consistent trip characteristics across a wide range of operating temperatures.Manual and Automatic Reset Modes: A selector allows the user to choose between manual or automatic relay reset after tripping.Test and Stop Function: Includes a test button to verify the mechanical trip mechanism and a stop button to manually stop motor operation.Release Indicator: A visual indicator (usually a red LED) provides feedback when the relay trips.Durable Construction: Built with stable and reliable performance in mind, suitable for long-term or intermittent operation.