The HHD10 series protection relay is designed for three‑phase 380 V, 50 Hz motor control circuits. It monitors voltage on each phase and disconnects the motor supply when abnormal conditions such as phase loss, phase sequence error, voltage imbalance, over‑voltage or under‑voltage occur, ensuring rapid and reliable motor protection.
The manual describes the relay’s specifications, wiring diagrams, installation methods (both rail‑mounted and device‑mounted), adjustment of over‑/under‑voltage thresholds, and indicator lamp functions. It also includes example application circuits and ordering information. This manual is written in Chinese.
| Power Supply | Three‑phase 380 V, 50 Hz (85%‑110% voltage range) |
|---|---|
| Over‑Voltage Setting (HHD10‑C) | 445 V‑465 V, delay 3‑5 s (non‑adjustable) |
| Under‑Voltage Setting (HHD10‑C) | 290 V‑310 V, delay 3‑5 s (non‑adjustable) |
| Contact Rating | 3 A AC at 380 V (resistive load) |
| Installation Types | Device‑mounted and rail‑mounted |
The contacts are rated for 3 A AC at 380 V for resistive loads.
First secure the mounting brackets, then insert the relay, tighten the mounting screws, and finally connect the wiring as shown in the wiring diagram.