NR2-93 Relay for NC1 / NC2 Contactor
Chint NR2-93 Thermal Overload Relay, 23–93A, For NC1/NC2 Contactors
Bimetal thermal overload relay for 3-phase AC motors with adjustable current ranges up to 93A. Provides overload and phase break protection and mounts directly on Chint NC1 and NC2 contactors.
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Chint NR2-93 is a thermal overload relay designed for bimetal protection of 3-phase AC motors. With multiple adjustable current ranges up to 93A and direct plug-in compatibility with Chint NC1 and NC2 contactors, it provides reliable overload and phase break protection in industrial motor starter applications up to 690V AC.
Key Features
Bimetal thermal overload relay for 3-phase AC motors
Adjustable current ranges across the NR2-93 family (e.g., 23–32A, 30–40A, 37–50A, 48–65A, 55–70A, 63–80A, 80–93A)
Provides overload and phase break/phase loss protection
Rated insulation voltage up to 690V AC, 50/60 Hz
Tripping class 10A for standard motor protection
Direct plug-in mounting on Chint NC1 and NC2 contactors
1 NO + 1 NC auxiliary contacts, potential-free
Manual and automatic reset options
Temperature compensation for stable tripping characteristics
Trip indication, plus built-in test and stop buttons
Certified by CE, KEMA, EAC, RCC, and UL; complies with IEC/EN 60947-4-1
Technical Specifications
| Parameter | Value |
|---|---|
| Model | NR2-93 |
| Brand | Chint |
| Type | Thermal Overload Relay (bimetal) |
| Compatible Contactors | Chint NC1/NC2 series |
| Available Current Ranges (family) | 23–32A, 30–40A, 37–50A, 48–65A, 55–70A, 63–80A, 80–93A |
| Rated Insulation Voltage | Up to 690 V AC |
| Frequency | 50 / 60 Hz |
| Tripping Class | Class 10A |
| Protection Functions | Overload, phase break / phase loss |
| Auxiliary Contacts | 1 NO + 1 NC, electrically separated |
| Reset Modes | Manual/Automatic selectable |
| Mounting | Direct plug-in on NC1/NC2 or independent with accessories |
| Features | Temperature compensation, trip indicator, test & stop buttons |
| Certifications | CE, KEMA, EAC, RCC, UL |
| Standards Compliance | IEC/EN 60947-4-1 |
| Typical Application | 3-phase AC motor overload protection in industrial panels |
| Approx. Dimensions (L × W × H) | ~10 × 9 × 12 cm (approx.) |
| Approx. Weight | ~0.60 kg (approx.) |
Applications
Overload and phase loss protection for 3-phase induction motors
Motor starters using Chint NC1 and NC2 contactors
Pump, blower and compressor control panels
Conveyor and material handling systems
HVAC and utility motor control centres
General industrial automation and machine panels
What’s in the Box?
1 × Chint NR2-93 Thermal Overload Relay (selected current range)
Product markings and scale for current setting
OEM packing and identification label
FAQ
Q1. What current ranges are available for the Chint NR2-93?
A1. The NR2-93 family is available in multiple adjustable current ranges, including 23–32A, 30–40A, 37–50A, 48–65A, 55–70A, 63–80A, and 80–93A. Select the range based on your motor's full load current.
Q2. Is the NR2-93 suitable for 3-phase motor protection?
A2. Yes. It is specifically designed for 3-phase AC motor overload and phase break protection and is commonly used in DOL and star-delta starters.
Q3. Can this relay be directly mounted on Chint contactors?
A3. The NR2-93 is designed for direct plug-in mounting on Chint NC1 and NC2 contactors. It can also be installed separately using suitable mounting accessories.
Q4. What auxiliary contacts are provided?
A4. The relay includes 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contact, which are potential-free and can be wired into control or alarm circuits.
Q5. Does the relay support both manual and automatic reset?
A5. Yes. The NR2-93 offers manual and automatic reset modes, selectable on the device, allowing you to match the reset behavior to your application and safety standards.
Q6. What certifications does the NR2-93 have?
A6. It is certified by CE, KEMA, EAC, RCC, and UL and complies with IEC/EN 60947-4-1, making it suitable for standard industrial applications.