Gas-insulated test transformerZC-501B

1. Clean, free from oil contamination, and maintenance-free;

2. Unaffected by harsh weather conditions; testing can be performed immediately after on-site transport without the need for a settling period;

3. Insulation strength is significantly higher than that of oil-immersed test transformers, with minimal corona discharge;

4. Convenient to use; the gas-insulated transformer is compact and lightweight, weighing 20%–60% less than oil-immersed equivalents of the same power rating;

5. Constructed using high-quality materials: a multi-stage cylindrical frame-type core made of high-grade cold-rolled DQ-151 grain-oriented silicon steel sheets, and a high-voltage tower-style coil wound continuously and directly onto a specially designed, high-strength insulating cylinder using QZ-type wire. The casing is compact and form-fitting, and the interior is filled with SF6 gas;

6. Innovative DC output method: The instrument ingeniously houses a high-voltage silicon rectifier stack within the high-voltage bushing; by inserting or removing a short-circuiting rod, the test transformer can be switched between a power-frequency high-voltage AC output and a high-voltage DC output;

7. High-quality series-excitation winding: The instrument incorporates a series-excitation winding alongside the high-voltage winding, featuring a dual-lead output structure within the high-voltage bushing;

8. High testing accuracy: Built upon the foundation of a standard transformer, this instrument employs advanced manufacturing techniques and insulation structures. Leveraging the inherent arc-quenching properties of SF6 gas, the transformer exhibits virtually no partial discharge even at high voltages. Consequently, when used as the high-voltage power source for partial discharge testing of electrical equipment—in conjunction with a high-precision partial discharge detector—it enables accurate measurement of the test object’s partial discharge levels without interference.