MOEORW-WGF40 40kV Ultra-Low Frequency High-Voltage Generator
Product Introduction
Compliant with domestic and international power testing standards including DL/T 849.4-2004, IEC 60840 and IEEE 400.2, the 40kV ultra-low frequency high voltage generator is specially developed for handover tests and preventive withstand voltage tests of 35kV cables, switchgears, large and medium-sized motor/generator stator windings, high-voltage bushings and capacitors. Adopting high-speed digital frequency conversion and high-voltage side sampling technology, its test power is only 1/500 of traditional power frequency withstand voltage equipment, which greatly reduces on-site power supply load. The split lightweight structure adapts to field transportation and batch packaging, suitable for full-scenario maintenance and testing in power grids, new energy power stations, industrial metallurgy, rail transit and cable factories. As a direct manufacturer, we provide 30kV/40kV/60kV/80kV full-series models, supporting bulk wholesale, OEM customization and project tailored solutions. Complete qualification documents, operation videos and technical manuals are delivered with products, and both bulk order and single-piece retail are available to meet diverse procurement demands.
Product feature
Split Modular Structure, Lightweight, Durable and Low Transportation Loss
The equipment adopts an independent split design of controller and booster. The high-voltage cylinder is integrally cast with epoxy resin without splicing gaps, featuring a firm and stable structure. All products pass the 1.2-meter drop damage-free test before delivery and are equipped with independent shockproof foam packaging to avoid damage during batch transportation. Overall Use Value: The lightweight and portable design adapts to various narrow and field construction scenarios. With stable structure and high yield rate, it effectively reduces transportation loss, after-sales cost and inventory pressure for both single-piece on-site use and bulk container shipment.
Fully Automatic Program-controlled Test, Low Operation Threshold, High Efficiency and Strong Versatility
Equipped with an industrial-grade DSP main control chip, the device has built-in full sets of national standard test procedures for cables and motors, with programmable voltage, pressure holding time, output frequency and protection threshold. It supports automatic voltage rise, pressure stabilization, timing, voltage drop and fault shutdown, with real-time sine waveform display for full visual operation. Overall Use Value: The standardized automatic test process greatly reduces operation threshold and staff training costs. New operators can get started quickly with standardized and unified testing procedures, improving overall work efficiency and adapting to daily testing of various teams and projects.
Large-capacity Data Storage + Dual-channel Report Output, Worry-free Acceptance
Built with 64 groups of independent test data storage space and an embedded thermal printer, it supports on-site instant paper report printing. The dedicated USB interface enables direct connection with computers to export original test data, matched with national standard official report templates. Overall Use Value: The fully recordable, storable and traceable test data and compliant reports perfectly meet the acceptance and filing requirements of power grids, general engineering contractors and enterprise maintenance, eliminating manual account sorting and greatly improving project acceptance pass rate.
Military-grade Configuration + Strict Aging Test, Long-term Stability and Low Failure Rate
The core inverter and sampling modules adopt industrial military-grade components. All equipment undergoes 72-hour uninterrupted full-load aging test before delivery, with an MTBF of no less than 12000 hours, far exceeding ordinary industry standards. Adopting three-proof spraying technology, it features moisture-proof, dust-proof and salt-spray resistant performance. Overall Use Value: With stable performance and ultra-low failure rate, the equipment is not easy to be damaged during long-term high-frequency field operation, greatly reducing maintenance, return and replacement costs. It has a long service life and high cost performance for both individual maintenance and long-term bulk project supporting.
Three-speed Adjustable Frequency, Multi-functional & Full-scenario Testing Coverage
It supports independent low-frequency output of 0.02Hz, 0.05Hz and 0.1Hz, adapting to various tested products with large capacitance differences such as power cables, generator stators, high-voltage bushings, power capacitors and high-low voltage switchgears. Overall Use Value: A single device covers most power withstand voltage testing scenarios without matching multiple devices, greatly reducing procurement costs. It features high equipment utilization and wide application range, meeting the needs of various conventional and large-scale testing projects.
Multiple Safety Protection, Full-process Safety
Integrated with six heavy safety protections including overvoltage, overcurrent, zero-position start, high-voltage interlock, emergency stop and built-in current-limiting resistor, the equipment cuts off abnormal high pressure within 20ms without additional external protective accessories. Overall Use Value: The all-round safety protection mechanism effectively avoids on-site risks such as high-voltage breakdown, electric leakage and equipment damage, protecting personal and equipment safety. It greatly improves operation safety and adapts to complex construction sites, unattended operation and novice operation scenarios.
Product Parameter (specification)
|
|
| Item | Specification |
|---|---|
| Rated Output Voltage | 40kV (peak) |
| Output Frequency | 0.1Hz / 0.05Hz / 0.02Hz |
| Load Capability | 0.1Hz ≤1.1μF; 0.05Hz ≤2.2μF; 0.02Hz ≤5.5μF |
| Accuracy | ±3% |
| Waveform Distortion | ≤5% |
| Power | AC220V±5%, 50Hz |
| Fuse | 10A |
| Environment | -10℃~+40℃, ≤85%RH |
| Structure | Split: controller 4kg, booster 20kg |

Prodection details
- 35kV cable and switchgear insulation test
- Medium motor and generator stator winding test
- High‑voltage capacitor and bushing test
- Industrial and power grid preventive maintenance
Company Qualifications






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