Import Ac Transformer Ratio Tester — Buy in wholesale FOB from Supplier in China

The AC Transformer Ratio Tester from Wuhan GDMK Electric Co., Ltd. is a portable field instrument designed to measure transformer turns ratio, vector group, and polarity for power transformers, potential transformers (PT), and current transformers (CT). The unit operates from AC 220V plus or minus 10% at 50/60Hz mains supply and weighs 3.8 kg with dimensions of 325 mm by 225 mm by 125 mm. A distinguishing feature is the blind measurement capability, allowing ratio and group testing without requiring a direct electrical connection between high-voltage and low-voltage windings, which reduces setup complexity and improves field safety.

The tester covers a ratio measurement range up to 10,000:1 with guaranteed accuracy of 0.3 percent even at the maximum ratio, a specification that meets the demands of both distribution and many power transformer applications. Beyond conventional transformer testing, the instrument adds CT polarity test functionality and accommodates Z-type transformer samples, broadening its applicability across transformer classes. Protection features include reverse connection protection and output short-circuit protection, guarding against common field wiring errors. The operating temperature range spans minus 10 to plus 50 degrees Celsius with relative humidity tolerance up to 90 percent without condensation, permitting use in uncontrolled substation environments.

Target buyers include power utilities, transformer maintenance contractors, electrical testing service companies, and large industrial facilities with in-house transformer fleets. The instrument's combination of ratio, group, polarity, and blind measurement functions positions it as a multi-purpose field tool rather than a single-function laboratory device. Pricing, minimum order quantity, and lead time are not disclosed in the source data and must be confirmed directly with Wuhan GDMK Electric Co., Ltd. Buyers should also verify whether calibration certificates, carrying cases, and test leads are included as standard or priced separately.

Wuhan GDMK Electric Co., Ltd. is based in Jiangxia District Economic Development Zone, Daqiao New District, Huangjiahu Avenue, Wuhan, China, postal code 430200. The supplier carries a harbour trust tier, representing entry-level platform verification without advanced or premium status. The recorded response metrics show zero percent response rate and zero average response hours, indicating minimal or no tracked buyer engagement through platform messaging. Buyers should anticipate potential delays in initial communication and plan for direct outreach via alternative channels if platform messaging proves unresponsive.

The company operates from Wuhan, a major hub for electrical equipment manufacturing and high-voltage research in central China. No factory size, annual revenue, year of establishment, or client reference list is provided in the source profile. The product range centres on transformer testing instrumentation, suggesting focused specialisation rather than broad electrical product diversification. Buyers evaluating this supplier should request factory audit reports, ISO 9001 certification status, and evidence of type test approvals or calibration laboratory accreditation for the instruments offered.