Installation and operation guide for the ABB ATS021 dual‑power automatic transfer switch.
The ATS021 is a dual‑power automatic transfer switch designed to ensure continuous load power by switching between two power sources when a fault occurs. It supports single‑phase, three‑phase four‑wire and three‑phase three‑wire systems and operates on 50 Hz or 60 Hz mains.
The guide covers safety information, wiring diagrams, configuration of DIP and rotary switches, LED indicators, manual and test modes, technical data, installation on DIN rails or cabinet doors, applicable standards, and troubleshooting procedures. This manual is written in Chinese.
| Operating frequency | 50 Hz – 60 Hz |
|---|---|
| Supported power systems | Single‑phase, three‑phase four‑wire, three‑phase three‑wire |
| Voltage monitoring range | ±30 % |
| Frequency monitoring range | 0.9 fn – 1.1 fn |
Only authorized electricians may install and service the automatic transfer switch.
Press the RESET button to reset the alarm.
Use the Lim rotary switch to select LN1 priority or LN1‑LN2 mutual backup.