Power frequency withstand voltage test transformer

Power frequency withstand voltage test transformerThe high-voltage test transformer is a series of test transformers developed and produced based on the "Test Transformer" standard, which has been greatly improved on the basis of similar products. The high-voltage test transformer is a new type of product developed and produced in accordance with DL/T848.2-2004 "General Technical Conditions for High Voltage Test Devices - Part 2: Power Frequency High Voltage Test Devices". This series of products has the characteristics of small size, light weight, compact structure, complete functions, strong universality, and easy use. High voltage test transformers are particularly suitable for conducting insulation strength tests on various high-voltage electrical equipment, electrical components, and insulation materials under power frequency or DC high voltage in power systems, industrial and mining enterprises, scientific research departments, etc.Power frequency withstand voltage test transformerIt is an essential equipment in high-voltage testing.

Specification, Model, Capacity (kVA), High Voltage (kV), High Voltage Current (mA), Low Voltage Input, Transformation Ratio (High/Meter), Temperature Rise (30 minutes)

Voltage (V) Current (A)

YDJ-3/50 3 50 60 200 15 500 10

YDJ-5/50 5 50 100 200 25 500 10

YDJ-10/50 10 50 200 200 50 500 10

YDJ-20/50 20 50 400 400 50 500 10

YDJ-30/50 30 50 600 400 75 500 10

YDJ-50/50 50 50 1000 400 125 500 10

YDJ-5/100 5 100 50 200 25 1000 10

YDJ-10/100 10 100 100 400 25 1000 10

Use wiring methods

As it is a dual-purpose high-voltage test transformer for both AC and DC, the short-circuit rod of the high-voltage silicon stack should be extracted from the bushing to put the test transformer in a DC output state. Before conducting a DC leakage test, it is advisable to select the resistance value of the current limiting resistor (water resistor) based on the fact that the output terminal breaking current in the leakage test does not exceed the high-voltage silicon stack rectifier. Then, according to the requirements of the tested object for the DC high-voltage waveform, select the capacitance value of the high-voltage filtering capacitor. In order to improve the measurement accuracy of the applied voltage to the test sample, an FRC resistive capacitive voltage divider should be connected to the high voltage side to measure the voltage.

Environmental requirements:

1. Input voltage: AC 220V or 380V, 50Hz;

2. Environmental temperature: -40 ℃ to 40 ℃;

3. Relative humidity: ≤ 85% (when the ambient temperature is 25 ℃);

4. In an environment without chemical gases and vapors;

5. In non explosive gases;

6. In situations where rainwater does not infiltrate.