Wuhan Goldhome Hipot Electrical Co., Ltd. is one of the leading manufacturers and suppliers of hmcxz-20800kva/260kv vehicle-mounted ac resonance test system 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 system applies an AC withstand voltage of up to 260 kV to 220 kV and below power cables, GIS, switchgear, transformers and bushings at their installed location. Because it is tuned to resonance with the specimen, the supply only has to cover the losses in the circuit rather than the full reactive power - which is how a 450 kW input drives a 20800 kVA test.
The whole set travels on one vehicle platform. The components are stored collapsed and fully sealed inside a container-style body; on site the carriage opens, the hydraulic system raises the reactor stack and divider to their vertical test position, and the support legs extend and level automatically. Once power, earth and test leads are connected, testing can start - no crane, no separate transport of individual units.
The high-voltage chain - frequency converter supply, excitation transformer, reactors and divider - is specified at partial discharge below 10 pC throughout, so the system can be used for PD-sensitive testing and not only for pass/fail withstand work.
Key features
Our advantage
Choose the plan that suits you best.
Test laboratory that travels
Container-style integrated platform, flatbed transport, stored collapsed and fully sealed between jobs.
Remote and manual control
The platform can be operated by remote control or by hand, and a spirit level confirms the platform is level before the test.
20800 kVA from a 450 kW supply
Resonance operation means the input covers circuit losses; Q is at least 50 at 300 Hz.
Clean output
Waveform distortion ≤1%, frequency resolution 0.1 Hz (0.01 Hz on the converter), system RMS accuracy class 1.5.
Hydraulic self-erection
Components are raised to vertical by the platform hydraulics, with 1.5 m total lift and automatic support-leg extension and levelling.
Reactors built for transport
Centre inner cylinder with fixed hollow disc winding and radial lead-out gap support - the stack can lie horizontally in transit and stand vertically to test.
Eight protection functions
Over-current, over-voltage at 1.2× setting, flashover, power-loss, auto voltage regulation, inverter overload, bridge-arm imbalance and phase-loss protection.
Site-ready build
IP54 converter cabinet with dust and rain cover, anti-corrosion treatment throughout, stainless nameplates, transport lashing and lifting provisions.
Technical Specifications
| Whole System | |
| Model | HMCXZ-20800kVA/260kV |
| Rated capacity | 20800 kVA |
| Rated voltage / current | 260 kV / 80 A |
| Specimen capacitance | Up to 1 µF |
| Working frequency | 20–300 Hz (test range 30–300 Hz) |
| Waveform distortion | ≤1% |
| Quality factor Q | ≥50 at 300 Hz |
| Continuous rating | 180 min at rated load; temperature rise ≤65 K |
| Measurement accuracy | System RMS class 1.5 |
| Partial discharge | <10 pC |
| Frequency converter supply - HMCXZ-450kW | |
| Output power | 450 kW |
| Input | AC 380 V ±10%, three-phase, 50 Hz |
| Output | Single-phase, 0–350 V continuously adjustable |
| Output current | 0–1285.7 A |
| Output distortion | ≤1.0% |
| Frequency range / resolution | 20–300 Hz / 0.01 Hz |
| Cooling / noise | Forced air / ≤85 dB |
| Insulation level | 1.2U₀ / 1 min |
| Excitation transformer - HMLBC-450kVA | |
| Rated capacity | 450 kVA |
| Low-voltage windings | 2 × (350 V, 400 V, 450 V) |
| Max input current | 1285.7 A |
| High-voltage windings | 3 kV / 4 kV / 5 kV, full-capacity winding with HV tail |
| Impedance voltage | ≤7% |
| Cooling / class | ONAN, oil-immersed self-cooling, insulation class A |
| Temperature rise (180 min) | Winding <65 K, top oil <55 K |
| Reactor - HMDK-6933.3/260 (3 sections) | |
| Rated capacity / voltage / current | 6933.3 kvar each / 260 kV / 26.7 A |
| Frequency range | 20–300 Hz |
| Insulation level | 1.1 UN / 3 min |
| Construction | Epoxy cylinder, oil-immersed self-cooling, horizontal transport / vertical operation |
| Noise | ≤70 dB |
| Divider and metering - HMFRC-300kV | |
| Rated voltage / capacitance | 300 kV / 2000 pF |
| Dissipation factor | ≤0.25% |
| Division ratio | 3000 : 1 |
| System measurement error | ≤±1.0% |
| Peak voltmeter | Large LCD, peak/√2, RMS, frequency, distortion; class 1.5 |
| Environment | |
| Operating temperature | −20 to +50 °C (storage −25 to +55 °C) |
| Relative humidity | ≤95% at 25 °C |
| Wind / ground slope | <4 m/s / ≤5° |
| Seismic | ≤8 intensity: 3.0 m/s² horizontal, 1.5 m/s² vertical |
| Supply and earthing | Independent 380 V, distortion <3%, earth resistance <1 Ω |
| Floor loading | 2 T/m² |
Scope of supply
| Item | Model / spec | Qty |
|---|---|---|
| Integrated withstand test system | HMCXZ-20800kVA/260kV | 1 set |
| Integrated test platform | Hydraulic, self-erecting | 1 set |
| Frequency converter supply + control fibre (20 m) + shielded measuring lead (20 m) | 450 kW | 1 + 2 + 1 |
| Excitation transformer + connecting leads (8 m) | 450 kVA | 1 + 3 |
| HV resonance reactors | 6933.3 kvar / 260 kV | 3 |
| HV divider, peak voltmeter, coupling capacitor | 300 kV | 1 each |
| Corona ring, anti-corona HV leads, test leads, accessories, cable reel | 300 kV / sets | 1 set each |
FAQ
Q: How long does it take to set up on site?
A: The vehicle is driven to site and the carriage opened. Components are raised to their vertical test position by the platform hydraulic system, the support legs extend and level automatically, and once the power, earth and test leads are connected testing can begin.
Q: What specimen capacitance can it drive?
A: Up to 1 µF at test voltages up to 260 kV, over a test frequency range of 30 to 300 Hz.
Q: Can the reactors be transported lying down?
A:Yes. The reactor uses a centre inner cylinder with a fixed hollow disc winding and radial lead-out gap support, which allows horizontal storage and transport as well as vertical operation during the test.
Company overview
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