Wuhan Goldhome Hipot Electrical Co., Ltd. is one of the leading manufacturers and suppliers of 300kv ac transformer insulation withstand test system for factory testing 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 AC transformer insulation test system is designed for factory high-voltage insulation withstand testing and partial discharge measurement.
The system uses a single-phase, 50Hz test transformer with a rated capacity of 300kVA and an adjustable AC output voltage of 0–300kV.
It is suitable for factory testing of electrical equipment with voltage levels below 300kV. The operation manual specifically identifies transformer insulation withstand voltage testing and partial discharge measurement as application areas.
The complete system combines a test transformer, integrated power supply cabinet, operation desk, current-limiting resistor, and capacitive voltage divider. These components work together to provide the power supply, voltage adjustment, high-voltage output, and voltage measurement functions required during testing.
High-Voltage Measurement Components
Capacitive Voltage Divider
The HMFRC-300kV/0.001uF capacitive voltage divider is used for high-voltage measurement.
| Parameter | Specification |
|---|---|
| Model | HMFRC-300kV/0.001uF |
| Rated voltage | 300kV |
| Nominal capacitance | 1000pF |
| Rated frequency | 50Hz |
| Voltage ratio | 687:1 |
| Dielectric loss | Less than 0.5% |
| Measuring accuracy | 1.5 class |
The voltage divider provides a measurement signal for monitoring the high-voltage output.
Current-Limiting Resistor
The HMRV-300kV/1-4 current-limiting resistor is included in the system configuration.
| Parameter | Specification |
|---|---|
| Model | HMRV-300kV/1-4 |
| Rated voltage | 300kV |
| Rated current | 1A |
| Rated frequency | 50Hz |
Integrated Power Supply for Stable Test Operation
The power supply cabinet integrates four main functional units.
Power Isolation Transformer
Rated capacity: 100kVA
Input voltage: 400V
Output voltage: 400V
Rated frequency: 50Hz
Voltage Regulator
Rated capacity: 100kVA
Input rated voltage: 380V
Output rated voltage: 0–400V
Output rated current: 250A
Frequency: 50Hz
Isolation Step-Up Filter
Rated capacity: 100kVA
Input voltage: 0–400V
Output voltage: 0–1kV
Rated frequency: 50Hz
Power Compensation Unit
Rated capacity: 250kVA
Rated voltage: 400V
Rated frequency: 50Hz
Combination compensation: 25, 50, 75, and 100
Test Control and Monitoring
The operation desk provides automatic and manual test modes.
In automatic mode, operators can configure up to three test stages. Each stage has adjustable test voltage, voltage boost speed, and withstand time.
The operating interface displays test information including:
Target voltage
Meter voltage
Voltage regulator current
High-voltage current
Low-voltage current
Low-voltage voltage
Withstand time
Current test stage
Running status
In manual mode, operators can use the boost and step-down functions to adjust the test voltage.
The control system also provides parameter settings for maximum test voltage, alarm voltage, low-voltage current alarm, high-voltage leakage current alarm, and flashover factor.
Main System Configuration
| Component | Model / Specification | Quantity |
|---|---|---|
| AC test transformer | HM-YDJW-300kVA/300kV | 1 |
| Operation desk | Automatic/manual operation | 1 |
| Integrated power supply cabinet | 100kVA isolation transformer and associated units | 1 |
| Current-limiting resistor | HMRV-300kV/1-4 | 1 |
| Capacitive voltage divider | HMFRC-300kV/0.001uF | 1 |
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