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NR8 Thermal Overload Relay
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NR8 Thermal Overload Relay
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NR8 Thermal Overload Relay

NR8 Thermal Overload Relay

The CHINT NR8 Thermal Overload Relay provides dependable overload and phase-failure protection for three-phase AC motors operating up to 690 V and 630 A. It features a three-phase bimetal structure, temperature compensation, and both manual and automatic reset modes for stable performance under varying load conditions. Compact and easy to install, the NR8 relay offers visual trip indication, a test and stop button, and plug-in or independent mounting, making it ideal for industrial automation and motor control systems.

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Product Information

Name
Size
Release time
Operate
NR8-Thermal Overload Relays-catalog.pdf
1.08MB
2025-03-05
Download
Name
Size
Release time
Operate
2111-NR8-200 NR8-630-Thermal Over-load Relay-Manual.pdf
1.21MB
2025-03-05
Download
2111-NR8-16~100-Thermal Over-load Relay-Manual.pdf
2.64MB
2025-03-05
Download
Name
Size
Release time
Operate
2211-NR8-Thermal Over-load Relay-CE Declaration Certificate.pdf
250.98KB
2025-03-05
Download
2205-NR8-38-Thermal Over-load Relay-CB Certificate.pdf
603.4KB
2025-03-05
Download
2110-NR8-16-Thermal Over-load Relay-CB Certificate.pdf
1.06MB
2025-03-05
Download
2006-NR8-630-Thermal Over-load Relay-CE Declaration -Certificate.pdf
596.72KB
2025-03-05
Download
2006-NR8-200-Thermal Over-load Relay-CE Declaration Certificate.pdf
585.16KB
2025-03-05
Download
1910-NR8-200-Thermal Over-load Relay-CB Certificate.pdf
469.22KB
2025-03-05
Download
1910-NR8-630-Thermal Over-load Relay-CB Certificate.pdf
472.13KB
2025-03-05
Download
1908-NR8-100-Thermal Over-load Relay-CB Certificate.pdf
757.02KB
2025-03-05
Download
1901-NR8-Thermal Over-load Relay-CE Declaration Certificate.pdf
536.5KB
2025-03-05
Download
Name
Size
Release time
Operate
NR8-100 23～80A-Thermal Over-load Relay-Drawing-3D.stp
10.53MB
2025-03-25
Download
NR8-38-Thermal Over-load Relay-Drawing-3D.stp
8.46MB
2025-03-25
Download
NR8-100 80～100A-Thermal Over-load Relay-Drawing-2D.pdf
131.75KB
2025-03-05
Download
NR8-630-Thermal Over-load Relay-Drawing-3D.stp
27.28MB
2025-03-25
Download
NR8-38-Thermal Over-load Relay-Drawing-2D.pdf
43.6KB
2025-03-05
Download
NR8-100 80～100A-Thermal Over-load Relay-Drawing-3D.stp
9.62MB
2025-03-25
Download
NR8-200-Thermal Over-load Relay-Drawing-3D.stp
17.71MB
2025-03-25
Download
NR8-16-Thermal Over-load Relay-Drawing-3D.stp
13.59MB
2025-03-25
Download
NR8-16-Thermal Over-load Relay-Drawing-2D.pdf
129.22KB
2025-03-05
Download
NR8-100 23～80A-Thermal Over-load Relay-Drawing-2D.pdf
136.58KB
2025-03-05
Download
NR8-630-Thermal Over-load Relay-Drawing-2D.pdf
149.39KB
2025-03-05
Download
NR8-200-Thermal Over-load Relay-Drawing-2D.pdf
106.36KB
2025-03-05
Download

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FAQs

 

What is the purpose of the NR8 Thermal Overload Relay?

It protects three-phase AC motors from overload and phase loss, preventing overheating and equipment damage.

 

What voltage and current ranges does it support?

The NR8 series covers 0.1 A – 630 A and operates at up to 690 V AC, suitable for small to large industrial motors.

 

How is the relay installed?

Models up to NR8-100 use plug-in mounting with CHINT contactors, while higher-capacity models (NR8-200 and NR8-630) use independent mounting.

 

What reset modes are available?

The NR8 offers manual and automatic reset functions, allowing flexibility for different control systems.

 

Which industries benefit from the NR8?

It’s ideal for industrial automation, pumps, fans, compressors, and machine tools, providing dependable motor protection with high accuracy.

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