Chint NXR Thermal Overload Relay Chint NXR Thermal Overload Relay
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Chint NXR Thermal Overload Relay Chint NXR Thermal Overload Relay
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Chint NXR Thermal Overload Relay
Chint NXR Thermal Overload Relay
Chint NXR Thermal Overload Relay
Chint NXR Thermal Overload Relay
Chint NXR Thermal Overload Relay
Chint NXR Thermal Overload Relay
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Chint NXR Thermal Overload Relay
Chint NXR Thermal Overload Relay
Chint NXR Thermal Overload Relay
Chint NXR Thermal Overload Relay
Chint NXR Thermal Overload Relay
Chint NXR Thermal Overload Relay
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Chint original NPH1 Push button NPH1-10 NPH1-10J NPH1-20 NPH1-20J NPH1-30 NPH1-30J CHNT IP65 Waterproof Outdoor Pushbutton Box
Chint original NPH1 Push button NPH1-10 NPH1-10J NPH1-20 NPH1-20J NPH1-30 NPH1-30J CHNT IP65 Waterproof Outdoor Pushbutton Box

Chint NXR Thermal Overload Relay

Brand Name:Chint
Theory:Thermal Relay
Place of Origin:China
application:PROTECTIVE
Model Number:NXR
Contact Load:High Power
Protect Feature:Sealed
SKU: 1769741179026415616 Category: Chint Contactor & Overload Relays

Where to Use NXR Thermal Overload Relay?

The Chint NXR Thermal Overload Relay is a thermal overload relay designed to protect three-phase motors from overload and phase failure. It works in conjunction with contactors (such as Chint NC1/NC2/NXC series) to provide complete motor protection in motor control centers, industrial machinery, pump stations, and conveyor systems.

How Does a Thermal Overload Relay Work?

The NXR uses bimetallic strip technology. When motor current exceeds the set value for a sustained period, the bimetallic strip heats up and bends, triggering the auxiliary contacts to open the contactor coil circuit - safely stopping the motor before damage occurs.

Key Features

  • Adjustable Current Setting - Dial adjustment from 0.1A - 630A to match motor FLC
  • Phase-Failure Protection - Detects and trips on phase loss (single-phasing) which can burn out motors
  • Temperature Compensation - Maintains accurate tripping across ambient temperatures from -25°C to +55°C
  • Manual/Auto Reset - Choose immediate restart or require manual intervention after trip
  • Direct Mounting - Mounts directly below corresponding contactor for compact installation

Technical Specifications

Model SeriesNXR
Current Range0.1A - 630A
Trip ClassClass 10 (Standard Motor Protection)
Protection FunctionsOverload + Phase Failure
Reset ModeManual / Automatic
MountingDirect mount on NC1/NC2/NXC contactors
StandardIEC 60947-4-1

FAQs

Q: How do I set the overload relay current?

A: Set the dial to match your motor's Full Load Current (FLC) as shown on the motor nameplate. For example, if motor FLC is 12A, set relay to 12A. The relay will trip at approximately 105-120% of this setting.

Q: What's the difference between NR2 and NXR series?

A: NR2 is the classic series with proven reliability. NXR offers enhanced features and modern styling while maintaining compatibility with Chint contactors.

  • Description
Description

Chint original NXR Overload Relay NXR-12 NXR-25 NXR-38 NXR-100 NXR-200 NXR-630 CHNT Thermal Overload Relay

   

Chint NXR thermal overload relays (hereinafter abbreviated as thermal relays) are suitable for overload and phase loss protection for uninterrupted or intermittent AC motors with AC frequency of 50 Hz/60 Hz, a voltage up to 690 V, and a current of (0.1-630)A. The thermal relays also provide temperature compensation, action indication, automatic and manual reset, stop, and testing functions. The products are characterized by stable and reliable performance. The thermal relays can be plugged into contactors or installed independently.
Compliant standards: IEC/EN 60947-4-1, IEC/EN 60947-5-1.

 

 – Three-phase bi-metal sheet type or electronic type (NXR-200, NXR-630), with a tripping level of 10A
 – With phase loss protection
 – With a device for continuous adjustment of setting current
 – With temperature compensation
 – With action indication
 – With testing mechanism
 – With stop bottom
 – With manual and automatic reset button (NXR-200 and NXR-630 only have manual reset)
 – With one NO contact and one NC contact that are electrically separable
 – Installation method: Plugged into contactor (NXR-12, 25, 38, 100) or installed independently (NXR-200, 630)
 – Protection characteristics

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