Wuhan Goldhome Hipot Electrical Co., Ltd. is one of the leading manufacturers and suppliers of automatic 300kv ac hipot test system with three-stage voltage control in China. With abundant experience, our factory offer high quality customized products made in China with competitive price. Welcome to contact us for quotation.
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Products Description
The HM-YDJW-300kVA/300kV automatic AC hipot test system is designed for power-frequency high-voltage insulation withstand testing.
Its control system provides automatic and manual operating modes, allowing operators to configure and carry out tests according to the requirements of the test object.
In automatic mode, the operator can set three test stages. Each stage supports individual target voltage, voltage boost speed, and withstand time settings.
In manual mode, the operator can control voltage boost and step-down operations through the control interface.
The system is part of the HM-YDJW-300kVA/300kV PD-free Power Frequency AC Hipot Tester. The complete test set includes a 300kVA/300kV single-phase test transformer, integrated power supply cabinet, current-limiting resistor, capacitive voltage divider, and operation desk.
Capacity
300 kVA
Max voltage
300 kV
System PD
300 kV
Divider
687 : 1
technical Specifications
Test set and transformer
| Rated capacity | 300 kVA |
| Output voltage | AC 0–300 kV |
| Output current | 1.0 A |
| Frequency | 50 Hz |
| Transformer construction | Insulated tank enclosure |
| Number of phases | Single-phase |
| Transformer input | 1 kV |
| System partial discharge | <10 pC |
Operation desk
| Phase | Single-phase |
| Working power source | 220 V |
| Manual maximum voltage setting | 0–330 kV |
| Flashover factor | 20%–99%, typically 30% |
| Test stages | Three, independent settings |
| Reporting | Stored records, Excel export |
| Indicators | E-stop, zero, close |
Supply cabinet sub-units
| Power isolation transformer | 100 kVA, 400/400 V |
| Voltage regulator | 100 kVA, 380 V → 0–400 V, 250 A |
| Isolation step-up filter | 100 kVA, 0–400 V → 0–1 kV |
| Power compensation | 250 kVA, 400 V, 25/50/75/100 |
Resistor, divider and environment
| Current-limiting resistor | 300 kV / 1 A / 50 Hz |
| Divider capacitance | 1000 pF |
| Divider ratio | 687 : 1 |
| Divider dielectric loss | <0.5% |
| Measuring accuracy | Class 1.5 |
| Ambient temperature | −20 to +50 °C |
| Altitude | Below 2000 m |
| Relative humidity | <90% at 25 °C |
Applications
Factory routine testing
Power-frequency withstand tests on equipment rated below 300 kV, run to a repeatable sequence with a recorded result each time.
Transformer insulation withstand
Applied voltage testing of transformer insulation, with the test voltage read from the 300 kV divider chain.
Partial discharge measurement
Discharge measurement alongside the withstand test, on a system specified below 10 pC end to end.
FAQ
Q: What partial discharge level does the system achieve?
A: The complete system is specified below 10 pC, measured with the supply harmonic component below 5% and preferably in a shielded room.
Q: What are the site requirements?
A: Ambient −20 to +50 °C, altitude below 2000 m, relative humidity below 90% at 25 °C, and a single-point earth for the desk and the transformer in the same earth network.
Q: Are test results recorded?
A: The desk stores test records and generates an Excel report. A report must be saved for each test, otherwise the record is overwritten by the next test.
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