Service manual for the JRS2 series thermal overload relays covering installation, adjustment, maintenance and fault troubleshooting.
The JRS2 series thermal overload relays are designed for AC 50‑60 Hz systems up to 660 V and 0.1‑630 A. They provide overload, phase‑loss protection and feature manual or automatic reset options. The relays comply with GB14048.4 and IEC 60947‑4‑1 standards and have an IP20 protection rating.
The manual details installation conditions (altitude ≤2000 m, ambient temperature –5 °C to +40 °C), wiring guidelines, adjustment of the setting current, maintenance procedures, fault analysis and warranty information. It also includes ordering specifications and recommended auxiliary devices such as RDT16 type fuse. This manual is written in Chinese.
| Rated voltage | 660 V |
|---|---|
| Rated current range | 0.1 A ~ 630 A |
| Operating frequency | 50 Hz / 60 Hz |
| Maximum installation altitude | 2000 m |
The relay may be installed at altitudes not exceeding 2000 m.
The manual recommends using an RDT16 type (NT) fuse as specified in the auxiliary circuit parameters table.
The surrounding air temperature must be between –5 °C and +40 °C, with a 24‑hour average not exceeding +35 °C.