Ac Test Systems With Transformer

AC Test Systems with Transformer The AC test transformer are especially designed for testing high voltage products and components, such as cables, power transformers, gas-insulated switchgears, bushings and arresters. It is also suitable to test insulation materials. They are used to generate 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 & 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 and 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 its application range. Parameters:Insulating sheath transformers is installed in an insulating sheath and is 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.Model No.        Structure           Max voltage    YDTWSingle unitupto 750kV       YDTCW       Cascadedupto 2250kVMetal tank transformers is situated in an enclosed and earthed metal tank. This transformer is oil-cooled and can be optionally equipped with a suitable bushing (oil-to-air or oil-to-SF6) This design is allowing continuous operation and high currents (high power) which qualified for continuous duty, long duration tests.     Type       Structure Max voltageYDWSingle unitupto 750kVYDCW    Cascaded      up to 2250kV  AC test system with Gas-insulated transformerThe SF6 insulated test transformer is designed as a Gas-insulated model which convenient for testing GIS/GIL components and switchgears. This makes testing of such installations possible without feeding them through an air-SF6 bushing.Type  StructureMax voltageMax capacity  YDQW       Single unit      up to 1200kV         up to 4800kVA        Main components:switchgear cabinetVoltage regulatorTest transformerDamping resistancevoltage dividerControl and Measuring System (manual operation or computer-aided automatic systems)Additional features and accessories:Power noise filterIsolation transformerHarmonic filters to improve wave shapeCoupling capacitorfixed or tunable compensation of capacitive testing powerFast over-voltage protection devicePartial discharge (PD) measuring system including blocking impedanceCompressed gas capacitorCapacitance and dissipation factor measuring instrumentMoveable designMade solution upon customer's request