Profile: Yangzhou Power Electric Co., Ltd. produces a complete set of high voltage & high-capacity testing equipment. We are an ISO 9001:2000 certified company. AC test transformers are especially designed for testing high voltage products & components such as cables, power transformers, gas-insulated switch gears, bushings, and arresters. They are also suitable to test insulation materials. They are used for testing high voltage, and function as part of the complete system. These systems are particularly suited for tests requiring stable voltage even if the load changes under voltage (corona, wet, and pollution tests), or when the load is inductive (inductive voltage transformers). The AC test transformer can be either in insulation cylinder type with metallic cover & base, or metal tank. The insulation cylinder modular test transformers can be stacked to connect in series or parallel to get larger voltage or current to extend their application range. Insulating sheath transformers are installed in an insulating sheath, and are oil-cooled. Individual transformers can be connected in parallel or series to increase the current or the voltage. The possibility of stacking several of these transformer modules allows reaching very high voltage levels by keeping reasonable floor space.