The NHRT40 series fuse isolating switch is suitable for AC rated voltage of 660V and below, AC 160A 630A. It is mainly used in the distribution circuits and motor circuits with high short-circuit currents in industrial enterprise power distribution systems, and provides short-circuit protection for AC circuits. This switch is not suitable for use as a switch for starting and disconnecting a single motor.
This manual describes the NHRT40 series fuse type isolating switches, including the 160, 250, 400 and 630 A variants. It outlines the intended applications, compliance with GB 14048.3 and IEC 60947‑3, and the basic operating principles.
Key sections cover normal operating conditions, installation requirements, main electrical parameters, physical dimensions, and additional product information. The document is intended for engineers and technicians responsible for selecting, installing, and maintaining these switches. This manual is written in Chinese.
| Rated AC Voltage | 660 V and below |
|---|---|
| Rated Current | 160 A – 630 A |
| Rated Frequency | 50 Hz |
| Short‑circuit Capacity | 100 kA |
| Ambient Temperature Range | -5 °C to +40 °C |
| Maximum Installation Altitude | 2000 m |
| Applicable Standards | GB 14048.3, IEC 60947‑3 |
The switch can be installed in ambient temperatures from –5 °C up to +40 °C.
The NHRT40 series is rated for a short‑circuit current of 100 kA.
They are rated for AC voltages up to 660 V and currents ranging from 160 A to 630 A.
The switches comply with GB 14048.3 and IEC 60947‑3.