High intensity discharge lamp ballast circuit

High-power AC voltage stabilizer

High-voltage generator with voltage control on the basis of the

Hybrid tap-changing transformer with full range of control...

Improved tap switching power supply

In-line buck/boost voltage-regulation systems and apparatus

Inductance controller with load regulator

Limiting ring current in short circuit between adjacent...

Limiting ring current in short circuits between adjacent...

Load tap change monitoring system and method

Load tap change monitoring system and method

Load tapchanger transformer paralleling by daisy chain compariso

Load voltage based tap changer monitoring system

Low-distortion line voltage regulator

Magnetic amplifier apparatus for balancing or limiting voltages

Method and a device for controlling a secondary voltage in a...

Method and apparatus for automatic voltage reduction control

Method and apparatus for determining voltage regulator tap...

Method and apparatus for regulating voltage

Method and device for continuous adjustment and regulation of tr