SF-3D motor protection tester is a professional device for the calibration of motor protection devices and current type motor protection devices, thermocouples. It is suitable for various thermal relays and various active and passive motor protection devices for the action current and time testing, and can also test the action current of the current relay and the action time of the rated current.
The SF-3D electric machine protection tester is designed for testing and calibrating low‑voltage motor protection devices, thermal relays and thermocouples in power systems. It provides reliable, stable performance with intuitive readouts and high‑precision sensors.
Key features include adjustable three‑phase output current (0‑50 A or 0‑500 A), simultaneous three‑phase voltage and current output, automatic contact type detection, and fault simulation capabilities such as phase‑loss, ground‑fault and voltage imbalance. The device is controlled by a microcontroller for simple operation. This manual is written in Chinese.
| Power input | AC 380/220V 50Hz three‑phase four‑wire |
|---|---|
| Instrument class | 0.5 (customizable) |
| Output current | 3×50 A or 3×500 A (customizable) |
| Output voltage | 3×500 V (customizable) |
| Time measurement range | 0–999.999 s |
| Weight | 38 kg |
It requires an AC 380/220 V 50 Hz three‑phase four‑wire power supply.
The device can output either 3 × 50 A or 3 × 500 A, depending on the selected range.
First disconnect the power‑control switch and set the three‑phase adjustment knob to zero, then connect the three‑phase power and turn on the power‑control switch.