The relay protection test box/relay protection test device adopts a double carbon brush voltage regulator (i.e., double-sided voltage regulator). The large knob adjusts heavy-load AC/DC voltage and current, while the small knob adjusts light-load AC/DC voltage and current, allowing two outputs simultaneously. The relay protection test box/relay protection test device uses a 0.5-class digital meter and high-precision sensors for accurate measurement. It is equipped with a six-digit electric stopwatch to meet time measurement requirements, making it an excellent tool for relay protection personnel working in the field.
Working Principle:
The relay protection test box/relay protection test device consists of two circuits: the main circuit and the auxiliary circuit. The main circuit is adjusted by the large knob, and the auxiliary circuit is adjusted by the small knob. The main circuit controls its various output quantities through the "Output Selection" button switch on the panel, and each time the output is switched, the digital voltage/current meter on the device automatically monitors the output value. The auxiliary circuit is directly adjusted through the output switch control, and measurements can be taken with an external multimeter.
Technical Characteristics:
1. Input Power: AC220V±10% 50Hz
2. Rated Capacity: 0.75KVA (capacity can be increased or decreased as required)
3. Output:
Main Circuit: AC 0～250V (3A) (adjusted by large knob) 0～500mA (15V)
Series resistance: 0～10A (15V)
Series resistance: 0～100A (10A)
DC 0～350V (3A)
0～500mA (15V)
Series resistance: 0～10A (15V)
Auxiliary Circuit: AC 0～20V (1A) (adjusted by small knob)
AC 0～250V (1A)
DC 0～350V (1A)
4. Measurement Range:
Voltage measurement range: 0～500.0V (direct measurement)
AC current measurement range: 0～500mA (direct measurement)
0～10.00A (sensor input)
0～100.0A (sensor input)
DC current measurement range: 0～500.0mA (direct measurement)
0～10.00A (shunt input)
Time measurement range: 0～999.999S (resolution 1mS)
5. Accuracy: Measurement accuracy is 0.5 class
6. Dimensions: 272mm×172mm×262mm
7. Weight: 10Kg
