The RDM30LE series intelligent residual‑current circuit breaker is designed for 50 Hz AC networks with a rated voltage of 380 V and a rated current up to 630 A. It offers indirect‑contact protection for personnel, safeguards against ground‑fault currents, overload, short‑circuit, over‑voltage, under‑voltage, phase‑loss and zero‑phase loss, and can be used for infrequent motor starting and line switching.
The device is controlled by a microcontroller and housed in a plastic enclosure. Key components include the main switch with over‑current tripping coil, zero‑sequence current transformer, residual‑current tripping coil, test pressure device, display and signal detection circuits, and motor‑driven opening/closing mechanism. The manual details installation limits (altitude ≤2000 m, ambient temperature –5 °C to +40 °C, humidity up to 50 % at +40 °C), technical parameters, short‑circuit protection settings, dimensions, and ordering information. This manual is written in Chinese.
| Rated Voltage | 380 V |
|---|---|
| Rated Current | 630 A |
| Rated Frequency | 50 Hz |
| Delay Reclose Time | 20 s ~ 60 s |
| Under‑Voltage Setting (single‑phase) | 155 V ± 5 % |
| Installation Altitude Limit | ≤2000 m |
The RDM30LE is rated for 380 V and up to 630 A.
The delay reclose time can be set between 20 seconds and 60 seconds.