Technical and user manual for the NARI-RELAYS RCS-943AU high‑voltage transmission line protection device.
The NARI-RELAYS RCS-943AU is a digital, micro‑computer‑based protection device for 110 kV transmission lines. It provides fast primary protection with differential and zero‑sequence functions, plus a full set of backup protections such as distance, over‑current, low‑frequency and low‑voltage protection.
The manual covers application scope, hardware and software principles, setting and adjustment procedures, operation instructions, and detailed debugging guidelines, including communication interface configuration and fiber‑optic link testing. This manual is written in Chinese.
| Mechanical dimensions | 482 mm × 177 mm × 291 mm |
|---|---|
| Operating temperature range | 0 °C – 40 °C (normal), -10 °C – 50 °C (extreme) |
| Storage temperature range | -25 °C – 70 °C |
| DC power supply | 220 V, 110 V |
| AC voltage rating | 3/100 (Un) |
| AC current rating | 5 A, 1 A |
| Frequency | 50 Hz / 60 Hz |
| Normal power consumption | < 35 W |
| Trip power consumption | < 50 W |
The device measures 482 mm × 177 mm × 291 mm.