This manual describes the SHK‑KX switch arc extinguishing device, its protective functions (arc extinction, PT and over‑voltage protection) and optional features such as automatic line selection and harmonic elimination. It outlines the applicable voltage range (3‑35 kV), system grounding configurations, and the device’s operating principle.
The document also includes technical specifications, mechanical dimensions, environmental limits, ordering information, and guidelines for installation, commissioning, maintenance, packaging, and transport. Service and warranty details are provided for end users. This manual is written in Chinese.
| Rated Voltage | 3‑35 kV |
|---|---|
| Maximum Continuous Current | 1250 A |
| Rated Short‑Circuit Breaking Current | 31.5 kA |
| Arc‑Extinction Reaction Time | ≈15 ms |
| Ingress Protection | IP4X (closed), IP2X (door open) |
The device is designed for medium‑voltage power systems from 3 kV up to 35 kV.
The arc‑extinguishing controller can operate in about 15 ms, greatly reducing arc duration.
Optional functions include automatic line selection, harmonic elimination, and small‑current line‑selection features.