Import 50kv Very Low Frequency High Voltage Generator — Buy in wholesale FOB from Supplier in China

The 50KV Very Low Frequency High Voltage Generator from Wuhan GDMK Electric Co., Ltd. is a portable withstand voltage test instrument designed for power cable and rotating machinery insulation testing. The unit, model VLF-50, delivers a rated peak voltage of 50 kV at 0.1 Hz frequency with a load capacity of 1.1 microfarads, enabling equivalent dielectric stress testing compared to power-frequency methods but at a fraction of the equipment size and weight. A 20A fuse protects the output stage, and the instrument is housed in a compact enclosure suitable for field deployment in substations and cable installation sites across China.

Very low frequency testing at 0.1 Hz replicates the dielectric stress of 50/60 Hz power frequency tests on XLPE and EPR insulated cables, while dramatically reducing the charging current and therefore the physical size of the test set. The 1.1 uF load capacity corresponds to approximately 3.5 km of typical medium voltage cable, making this unit suitable for distribution network commissioning and maintenance. The peak voltage rating of 50 kV allows testing of cables rated up to approximately 15 kV AC, following the standard practice of applying 3U0 for acceptance testing and 2U0 for maintenance testing. Thermal design focuses on intermittent duty cycles typical of cable test programmes, with natural convection cooling and overload protection integrated into the control electronics.

Primary buyers include municipal power bureaus, railway electrification departments, large industrial facilities with private cable networks, and electrical contractors specialising in cable installation and fault location services. The generator serves both commissioning tests for newly laid cables and periodic preventive maintenance for operational infrastructure. Trade terms, MOQ and lead time are not stated in the listing; buyers should confirm these directly with Wuhan GDMK Electric Co., Ltd. along with calibration certificate availability and warranty coverage terms.

Wuhan GDMK Electric Co., Ltd. is based in Jiangxia District Economic Development Zone, Daqiao New District, Huangjiahu Avenue, Wuhan, with postal code 430200. The company operates from a location within Wuhan's established industrial zone, suggesting access to the city's electrical engineering supply chain and logistics infrastructure. The supplier holds a harbor trust tier, which represents a baseline verification status on the platform. The response rate is recorded at 0.00% with zero average response hours, indicating that direct communication attempts through the platform may not receive replies; buyers should consider alternative contact methods or working through established procurement channels.

The company profile does not disclose founding year, registered capital, factory floor area, employee count, annual revenue, or specific client references. No ISO certifications, CNAS laboratory accreditation, or utility patents are mentioned in the available data. The product range appears focused on high voltage test equipment, specifically the VLF generator series, though the full catalogue is not specified. Buyers should request a company presentation, business licence, and product type test reports directly from Wuhan GDMK Electric Co., Ltd. to assess technical competence and manufacturing capability before placing orders.