BZX-20S Transformer DC Resistance Tester

BZX-20S Transformer DC Resistance TesterIt is an instrument used for simultaneous measurement of three-phase DC resistance of large capacity transformer windings. This instrument can simultaneously test the three-phase winding of transformers, and can directly adjust the tap of on load tap changers without the need for discharge. The testing time is only one-third of traditional methods, solving the problem of long testing time for DC resistance of power transformers.

1、 Functional Features
1. All DC resistance data of high and low voltage windings can be measured with just one wiring;
2. Three phase simultaneous measurement with magnetic assistance method is faster and greatly reduces the risk of residual magnetism;
3. Display and print all test data of the high, medium, and low voltage windings of the transformer, automatically calculate the three-phase unbalance rate, and also print the resistance value converted to rated temperature;
4. Equipped with reverse electromotive force protection function;
5BZX-20S Transformer DC Resistance TesterEquipped with high-voltage demagnetization function for transformers;
6. Equipped with automatic discharge and discharge indication functions, reducing misoperation and ensuring equipment and personnel safety;
7. The instrument can store 500 sets of test data and can also use a USB drive to store data;
8. The instrument adopts a 5.7-inch ultra large LCD display, which can print test results at any time;
9. The instrument has the characteristics of wide temperature range, high accuracy, shock resistance, anti-interference, and easy portability.

2、 Technical parameters
Output current three-phase test: 2 * 10A, 2 * 5A, 2 * 2A
Single phase testing: 20A, 10A, 2A
Test range 2 * 10A: 500 μ Ω～ 500m Ω
2*5A： 1mΩ～1Ω
2*2A： 2.5mΩ～2.5Ω
20A: 250 um
10A: 500 um
2A： 2.5mΩ～10Ω
Resolution 0.1 μ Ω
Measurement accuracy ± (0.2% reading+2 words)
Dimensions 420mm × 250mm × 340mm
Instrument weight 13kg