This tap-changer which is made of new structure , new material and new technology has the merits of reasonable in structure , handle freely, turning flexibly, locating exactly, good hermetically performance and small value of contact resistance ,it has become the new generation product in these days and has been certified by Ministry Department of China in December 1995. There are two sorts of products for this tap-changer, it is suitable for oilimmersed three phase or single-phase power transformer with frequency 50Hz or 60Hz, highest Voltage for equipment 12kV and 40.5kV and 72.5kV, rated current 63A, 125A, 250A and 400A. It can be fixed directly on transformer tank cover or tank wall, they must be working under non-energized condition.

Type WSTZH2 three phase tap changer(star-delta delta connection)

The de-energized three-phase linear series-parallel connection,star-delta exchange, with voltage-regulation combined tap-changers can meet the switching requirements of different voltages in the power and transmission.

Type WDT4 single phase tap changer(delta connection)

This kind of switch applies to the single-phase combination oil-immersed transformer electrical power with rated voltage of 10KV-36KV, rated current of 63A-250A; the voltage-regulating mode are: central part, terminal point ncutral point, which can be dircctly fixed on the tank cover of the transformer, exchange under the off-circuit condition.

American-BOX TYPE CAGE OFF-CIRCUIT TAP SWITCH

This tap changer is mainly used for combined type (base type) transformer,which is called as “American-box type”in our country. It must tap and change under off-circuit status, and is used to finish voltage regulating function of primary coil.

Type WSTII three phase tap changer (delta connection)

This kind of switch applies to the three-phase combination oil-immersed transformer electrical power with rated voltage of 10KV-24KV, rated current of 30A-63A; the voltage-regulating mode are: central part, terminal point ncutral point, which can be dircctly fixed on the tank cover of the transformer, exchange under the off-circuit condition.

Oil-immersed Load Switch

Type WSTIII three phase tap changer (Common-output per Phase)

This kind of switch applies to the three-phase combination oil-immersed transformer electrical power with rated voltage of 10KV-24KV, rated current of 30A-63A; the voltage-regulating mode are: central part, terminal point ncutral point, which can be dircctly fixed on the tank cover of the transformer, exchange under the off-circuit condition.

F series On-load tap changer(Corner joint）


The de-energized three-phase linear series-parallel connection,star-delta exchange, with voltage-regulation combined tap-changers can meet the switching requirements of different voltages in the power and transmission.

Type WST4 three phase tap changer (delta connection)

This kind of switch applies to the three-phase combination oil-immersed transformer electrical power with rated voltage of 10KV-36KV, rated current of 63A-250A; the voltage-regulating mode are: central part, terminal point ncutral point, which can be dircctly fixed on the tank cover of the transformer, exchange under the off-circuit condition.

Type WSTZH3 three phase tap changer series-paraleldelta connection

Type WDPII2 single phase tap changer

Off-excitation tap changer is a kind of switch, suitable for rated voltage 10KV, rated current 63A or below 125A three-phase oil-immersed transformer, under the condition of no excitation, the purpose of adjusting the secondary voltage can be achieved by changing the number of turns of the primary coil of the transformer . The temperature of the tap changer in the oil medium is as low as -25°C and as high as 100°C.



The non-excited disc-shaped tap-changer is an embedded composite resistive transition structure, which combines the functions of the tap selector and the diverter switch. separate oil chamber. It has the advantages of simple structure, long service life and convenient installation and maintenance. The technical performance of the switch conforms to the standards of IEC60214 and GB10230 "on-load tap-changer".

Type WDTII Single phase tap changer (delta connection)

This kind of switch applies to the single-phase combination oil-immersed transformer electrical power with rated voltage of 10KV-24KV, rated current of 30A-63A; the voltage-regulating mode are: central part, terminal point ncutral point, which canbe dircctly fixed on the tank cover of the transformer, exchange under the off-circuit condition.