HM-YDJW-300kVA/300kV PD-Free Power Frequency AC Hipot Tester

1. 300kVA Test Capacity

The HM-YDJW test transformer has a rated capacity of 300kVA and a rated output voltage of AC 0–300kV.

It is designed for high-voltage AC insulation withstand testing in factory environments.

2. Integrated Power Supply Cabinet

The power supply cabinet integrates several functional units:

Power isolation transformer

Voltage regulator

Isolation step-up filter

Power compensation unit

The integrated arrangement provides the low-voltage power supply and adjustment functions for the high-voltage test transformer.

3. Power Frequency AC Testing

The system operates at 50Hz. The test transformer is single-phase and uses an insulated tank enclosure.

The equipment is intended for power-frequency AC withstand voltage testing rather than variable-frequency resonant testing.

4. Automatic and Manual Operation

The operation desk supports automatic and manual test modes.

In automatic mode, operators can configure three test stages, including the target voltage, voltage boost speed, and withstand time for each stage.

Manual mode provides voltage boost and step-down operations through the control interface.

5. System Partial Discharge Requirement

The operation manual specifies that, under a shielded test environment and with the harmonic component of the test power supply below 5%, the partial discharge level of the complete system should be less than 10pC at rated voltage.

This requirement describes the system-level partial discharge condition specified in the manual.