SF-101 type relay protection test instrument is a relay protection test box weighing only 10 kg. It adopts double carbon brush voltage regulator, large knob to adjust heavy load AC and DC voltage and current, small knob to adjust light load AC and DC voltage and current, and can output two paths at the same time. It adopts 0.5 level digital meter, high precision sensor, accurate measurement, and six digit display stopwatch to meet the need of time measurement.
The SF-101 portable relay protection tester is a lightweight (10 kg) device with a stainless‑steel or plastic‑aluminum enclosure, offering dual‑brush voltage regulators and a 0.5‑class digital meter for precise measurements. It provides both main and auxiliary output circuits for AC and DC voltage and current, as well as a built‑in 6‑digit stopwatch.
The manual explains the instrument’s operating principle, step‑by‑step usage procedures, safety precautions, and includes a separate section for the mathematical stopwatch, covering its measurement range, functions, and connection methods. This manual is written in Chinese.
| Input power | AC 220 V ± 10 % 50 Hz |
|---|---|
| Rated capacity | 0.75 kVA |
| Main circuit AC voltage output | 0 – 250 V (3 A) |
| Main circuit DC voltage output | 0 – 350 V (3 A) |
| Voltage measurement range | 0 – 500 V |
| AC current measurement range | 0 – 5 A (direct) / 0 – 100 A (sensor) |
| DC current measurement range | 0 – 500 mA (direct) / 0 – 5 A (shunt) |
| Time measurement range | 0 – 99.999 s (1 ms resolution) |
| Dimensions | 272 mm × 172 mm × 262 mm |
| Operating temperature | -20 °C to +45 °C |
Select the desired output range (e.g., AC 0‑250 V) and turn the large knob on the main circuit to set the voltage.
The device can measure DC voltage from 0 to 350 V.
Press the output control switch to start the stopwatch; short the stop terminals (Ⅱ and ⊥) to stop it.
Ensure no load is connected to any output terminals and the output control switch is in the OFF position before applying power.