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Products Description
A 100 kVA partial-discharge-free induced voltage test system for power transformers up to the 110 kV class. Variable frequency output from 45 Hz to 300 Hz at 0–800 V and 0–125 A, with an integrated partial discharge measurement chain rated down to 5 pC.
| Capacity | 100 kVA |
| Output voltage / current | 0–800.0 V / 0–125 A |
| Output frequency | 45.0–300.0 Hz, 0.1 Hz step |
| Partial discharge | ≤10 pC (source); ≤5 pC (step-up transformer and divider) |
| Total harmonic distortion | ≤2% at full-scale resistive load |
| Control | 15.6-inch colour LCD touch screen, Modbus TCP over RJ45 |
| Supply scope | VF power source, step-up transformer, 2 compensating reactors, capacitive divider |
System Composition
System Composition
The system is supplied as four matched units. Every high-voltage element in the measurement path is specified as PD-free, which is what keeps the background discharge level low enough for the test result to be usable.
1. HMCXZW-100kW PD-free variable frequency power source
- Capacity 100 kVA; single-phase output 0–800 V, 0–125 A, 45–300 Hz in 0.1 Hz steps
- High-frequency SPWM hardware regulation with high-power MOS/IGBT drive stage
- Rated for resistive, inductive and rectifier loads
- Partial discharge magnitude ≤10 pC
- 15.6-inch colour LCD touch screen with parameter memory and shortcut-key operation
2. HMGLB-100kVA PD-free isolation step-up transformer
- Capacity 100 kVA; input 0–800 V at 125 A
- Two output windings: 12 kV and 20 kV
- Output frequency 50–300 Hz
- Partial discharge level ≤5 pC
3. HMDKW-200/20 PD-free compensating reactor - two units
- Inductance selectable at 1.5 H / 3 H / 6 H
- Rated voltage 20 kV; rated current 10 A
- Operating frequency 20–300 Hz
- Partial discharge level ≤10 pC
4. HMFRCW-50kV PD-free capacitive voltage divider
- Rated voltage 50 kV
- Partial discharge level ≤5 pC at rated output voltage
Products Parameters
| Parameter | Value |
|---|---|
| Model | HMCXZW-100kW |
| Capacity | 100 kVA |
| Input phase | 3-phase, 3-wire + protective earth |
| Input voltage | 380 V ±10% |
| Input frequency | 50 / 60 Hz ±5 Hz |
| Output phase | Single-phase, 2-wire + protective earth |
| Output voltage | 0–800.0 V |
| Output current | 0–125 A |
| Output frequency range | 45.0–300.0 Hz |
| Frequency adjustment step | 0.1 Hz |
| Voltage stability | ≤±1% |
| Frequency stability | ≤±0.1% |
| Source voltage effect | ≤±0.5% FS |
| Load stability | ≤±0.5% FS |
| Load effect | ≤±1% |
| Total harmonic distortion | ≤2% (resistive load, full scale) |
| Waveform | Sine wave |
| Partial discharge magnitude | ≤10 pC |
| Efficiency | ≥85% |
| Display | 15.6-inch colour LCD touch screen |
| Voltage readout | Resolution 0.1 V; accuracy ±0.5% reading ±0.2% full scale |
| Frequency readout | Resolution 0.1 Hz; accuracy ±0.02% reading |
| Current readout | Resolution 0.1 A; accuracy ±0.5% reading ±0.5% full scale |
| Power readout | Resolution 0.1 kW; accuracy ±0.5% reading ±0.5% full scale |
| Protection functions | Output overcurrent, short circuit, overload, over-temperature |
| Communication interface | RJ45, Modbus TCP |
| Dielectric strength | Input/output to chassis: AC 1500 V for 1 min, leakage current <20 mA |
| Insulation resistance | Input/output to chassis: ≥20 MΩ at DC 500 V |
| Operating environment | −20 °C to 45 °C; 10–90% RH non-condensing at 25 °C; altitude ≤2000 m |
| Overall dimensions | W 1200 × H 1910 × D 1000 mm, including casters |
Operating Features
- Stable output under load change - voltage stability ≤±1%, load stability ≤±0.5% FS and load effect ≤±1%, so the test voltage does not drift as the specimen heats up
- Clean waveform - total harmonic distortion ≤2% at full-scale resistive load, which keeps harmonic content from being mistaken for discharge activity
- Online adjustment - voltage is adjustable while the set is running and output frequency is selectable, so the test can be brought up without repeated stop-start cycles
- Two operating modes - a normal mode and a partial discharge mode selectable from the front panel
- Protection - output overcurrent, short circuit, overload and over-temperature protection with audible and visual alarm and a fault code on screen
- Production-line readable - 15.6-inch colour LCD with a wide viewing angle, readable from a distance on a test floor
- Integration ready - RJ45 with Modbus TCP for connection to a test bench or plant system
FAQ
Q: Can it drive inductive and rectifier loads?
A:Yes. The power stage uses high-power MOS/IGBT devices with high-frequency SPWM regulation, and the output is rated for resistive, inductive and rectifier loads with an overload capability designed for test-duty cycling.
Q: What are the installation requirements?
A: A 380 V three-phase supply within 10% tolerance, protective earth bonding, 500 mm clearance on both sides and at the rear for ventilation, and an operating environment from −20 °C to 45 °C at 10–90% relative humidity, non-condensing, at altitudes up to 2000 m.
Q: What warranty is provided?
A: Three years of after-sales quality warranty from the date of sale unless otherwise agreed in the contract, covering repair or replacement of parts returned to the manufacturer or its appointed service unit.
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