Import Medium Voltage Variable Frequency Drives — Buy in wholesale FOB from Supplier in China

The Medium Voltage Variable Frequency Drives offered by Zhuhai Sinopak Electric Ltd. are industrial power converters designed for input voltages between 3 kV and 11 kV with a tolerance of - 20 % to +15 % and selectable frequencies of 50 Hz or 60 Hz ±10 %. Each unit provides a multilevel PWM sinusoidal output with total harmonic distortion below 4 % and can operate from zero up to the rated voltage at a frequency range of 0  -  50/60 Hz, minimum step 0.01 Hz. Efficiency at rated load exceeds 98.5 % and overall efficiency, including the transformer, is higher than 97 %, while power factor stays above 0.95 during regulation and above 0.97 at rated load. The drives include overload capability of 110 % for continuous operation, 120 % for one minute and 150 % for two seconds, with a protective shutdown at 160 %.

The enclosure is a steel cabinet that houses copper windings and a silicon‑steel core, a construction common to medium‑voltage drives and compliant with typical IEC mechanical standards. Two structural families are available: an integrated type where the transformer, power units and control system share a single cabinet, and a split‑type where those blocks are housed separately and linked on site for higher power ratings. Typical industry practice calls for forced‑air cooling and an IP31 protection grade, matching the indoor, non‑explosive environment described by the supplier. The drives support RS485 Modbus communication as standard, with optional Profibus‑DP or Ethernet ports, and provide up to 11 input and 10 output contacts plus analog I/O options.

These drives are frequently specified for mining conveyors, water‑treatment pumps, oil‑field compressors and power‑generation turbine control where precise speed regulation reduces mechanical stress. Plant engineers, EPC contractors and equipment integrators are the primary buyers, often requiring the integrated version for compact retrofits or the split version for large‑capacity new installations. Procurement terms such as minimum order quantity, price and delivery schedule are not disclosed in the listing and should be clarified directly with Zhuhai Sinopak Electric Ltd. before placing an order.

Zhuhai Sinopak Electric Ltd. is based in Zhuhai, Guangdong Province, China, at Room 202, No. 80 Shishan Village, Hengqin. The company carries a harbour‑level verification tier, indicating mid‑range platform checks, and its response rate is currently recorded as 0 % with no average response time provided. The address places the firm within a major industrial hub close to major ports, facilitating bulk shipments of heavy electrical equipment.

The supplier’s catalogue focuses on medium‑voltage variable frequency drives, offering both integrated and split‑type configurations to match different capacity needs. The listing specifies that the drives incorporate steel enclosures, copper windings and silicon‑steel cores, and that they support a range of communication protocols such as Modbus, Profibus‑DP and Ethernet. No information on minimum order quantities, lead times or pricing is supplied, so interested buyers must request those details directly from the company.