This manual covers the installation, operation, maintenance, and technical specifications of CHINT NR8 series thermal overload relays for motor protection.
The document is a user manual for the CHINT NR8 series thermal overload relay. It details the product's application as an overload and phase-failure protector for three-phase AC motors in circuits with frequencies of 50Hz or 60Hz and voltages up to 690V.
The guide provides comprehensive instructions on safety precautions, installation requirements, adjustment procedures, and troubleshooting. It includes technical specifications such as rated current ranges (up to 38A), electrical characteristics, and physical dimensions for various models including NR8-11.5, NR8-38, and NR8-100. This manual is written in Chinese.
| Rated Working Voltage | Up to 690V |
|---|---|
| Current Range | 0.1A to 38A |
| Ambient Temperature Range | -5°C to +40°C |
| Altitude Limit | 2000m |
It serves as an overload and phase-failure protection device for three-phase AC motors.
No, the thermal overload relay does not have short-circuit protection functionality.
The warranty period is 36 months from the date of production, provided normal storage and usage conditions are met.