The Sunshy SDF510 manual provides product overview, installation, wiring, operation, settings, troubleshooting, and technical specifications.
The SDF510 electrical fire limiting current protector is designed for low‑voltage distribution systems (≤0.4 kV) and is installed between the distribution switch and the load. It continuously monitors line current and provides fast short‑circuit, overload, and over‑temperature protection, with audible and visual alarms.
The manual covers safety precautions, unpacking, installation, wiring, operation of the display panel, configuration settings, common fault handling, and detailed technical specifications, including communication options such as RS485 Modbus‑RTU and optional NB‑IoT wireless. This manual is written in Chinese.
| Rated Voltage | 220 V |
|---|---|
| Short‑circuit protection time | ≤ 150 µs |
| Power consumption (idle) | < 0.2 VA |
| Overload setting | 1.2 Un |
| Communication interface | RS485 Modbus‑RTU |
| Operating temperature range | -20 °C ~ 40 °C |
| Voltage/current measurement accuracy | ± 0.5 % |
The device must be installed and serviced by qualified professionals, and the power must be disconnected before any internal or external work.
First eliminate the alarm cause, then reset the device after ensuring the power is safely disconnected.
The microprocessor drives the MOSFET solid‑state switch to cut off the output, isolating the protected circuit.
The unit provides a fixed RS485 or S‑BUS serial interface using Modbus‑RTU, and an optional NB‑IoT wireless module for cloud connectivity.