METHOD AND DEVICE FOR CHANGING A TRANSFORMATION RATIO, AN IMPEDANCE, OR A VOLTAGE USED FOR EXCITATION

NO-ARC ON-LOAD TAP CHANGER, SWITCHING CONTROL METHOD AND ELECTRICAL EQUIPMENT

TRANSFORMER FOR CONTROLLING INDEPENDENT ACTIVE AND REACTIVE POWER FLOWS IN A TRANSMISSION LINE

Method and System for Effective Handling of Reverse Power Flow for On-Load Tap Changer Controller

Micro-Stepping Cascading AC Voltage Regulator

ON-LOAD TAP CHANGER AND TAP-CHANGING TRANSFORMER HAVING AN ON-LOAD TAP CHANGER

ON-LOAD TAP CHANGER AND METHOD FOR ACTUATING AN ON-LOAD TAP CHANGER

FULL RANGE BOOSTING DEVICE FOR ACCUMULATOR OF ON-LOAD TAP CHANGER, ACCUMULATOR, AND ON-LOAD TAP CHANGER

VARIABLE-IMPEDANCE ELECTRIC TRANSFORMER

Assembly for automatic tap adjustment of a power transformer using load tap changer and a method and support assembly for mounting the same

Wind turbine power generation comprising an AC-DC-AC converter and a transformer with a tap changer

Three-phase multi-tap balancing distribution transformer

POWER ELECTRONICS ON-LOAD TAP CHANGER WITH A REDUCED NUMBER OF TAPS

Vacuum interrupter module for a tap changer, power diverter switch, and tap changer

Method for carrying out a switchover of at least two switching means for equipment, and drive system for at least two switching means in equipment

Apparatus and method for improving efficiency of distributed generation facility

Method for carrying out a switchover of an on-load tap changer using a drive system, and drive system for an on-load tap changer

Load transfer switch for on-load tap changer, and on-load tap changer

On-load tap changer head and on-load tap changer having an on-load tap changer head

Flexible transformer system

Dual motor system

Switch element for tap changer, and tap changer

Load transfer switch for an on-load tap changer and continuous main switch and disconnecting switch for same

Method for controlling a switch module based on thyristor switching elements

Longitudinal voltage regulation at the line terminals of a phase shifting transformer

ON-LOAD TAP CHANGING APPARATUS AND ON-LOAD TAP CHANGING SYSTEM

Monitoring tap changer switching

Power electronic tap changer module for transformer

Transformer device with modified voltage tap arrangement

On-load tap changer, regulating transformer with on-load tap changer, and method for connecting an on-load tap changer

On-load tap changer device

On-load tap changer and method of and system for operating same

Electric system with control winding and method of adjusting same

Permanent magnet drive on-load tap-changing switch

Permanent magnet drive on-load tap-changing switch

Permanent magnet drive on-load tap-changing switch

Switching arrangement for a control transformer, in particular polarity switching means

On-load voltage regulation tap switch for transformer and switch control method

Preselector switch assembly for a variable transformer

Switched energy resonant power supply system

Switching circuit with two load tap changers, electrical assembly with such a switching circuit, and use thereof

Tap-changer switching system and method of operating same

Switch

On-load tap changer according to the reactor switching principle

Electrical switching system for a three-phase network

Double dead band tab switch for transformer and control method

System and method for regulation of voltage on an electrical network

Switching system with preselector

Switching system with preselector

Method of manufacturing an electromagnetic induction device and an electromagnetic induction device

System and method for optimizing wind turbine operation

Universal power conversion devices for alternating current electric apparatus

Voltage control system

Method for performing a switching process in an on-load tap changer

Method of operating on-load tap changer

Load tap changer

Thyristor assisted on-load tap changer and method thereof

Single-phase electric furnace transformer

Actuator for a tap changer

System and method for operating an on-load tap changer

Smart voltage reduction and reverse power operating mode determination for load tap charging transformers and voltage regulators

On-load tap changer

Tap changer with an improved drive system

Distribution transformer for voltage regulation of local distribution networks

On-load tap changer

Transformer with on-load tap changer

Stepping switch with vacuum switching tubes

TAP CHANGER

External on-load tap changer

Tap changer

Energy-storing unit with forcing mechanism, and on-load tap changing device

Tap changer having a vacuum interrupter assembly with an improved damper

Gearbox for a tap changer, a tap changer and a transformer

Tap changer and vacuum interrupter for such a tap changer

Load tap changer

Fluid insulated high voltage coil

Tap changer and vacuum interrupter for a tap changer of this kind

Tap changer with vacuum interrupters

Change-over structure between moving contact and static contact of tap selector

Tap changer and vacuum switching tube for such a tap changer

On-load tap changer

On-load tap changer

On-load tap changer

Fault gas alarm system

Tap changer with a polarity switch for a variable transformer

Device for explosion prevention of an on load tap changer including a rupture element

On-load tap changer comprising semiconductor switching elements

Power supply arrangement for direct electrical heating of a pipeline system

Tap switch with semiconductor switching elements

Voltage regulation system

Method for switching without any interruption between winding taps on a tap-changing transformer

System and method for preventing, protecting OLTC from fire and/or transformer from explosion

A RESISTOR FOR ELECTRIC HIGH-VOLTAGE APPARATUS AND A METHOD OF MOUNTING A RESISTOR

Hybrid on-load tap changer and a method of operating the same

External hanging combined vacuum on-load tap switch

Solution mining and in situ treatment of nahcolite beds

VARIABLE VOLTAGE LOAD TAP CHANGING TRANSFORMER

Irregular spacing of heat sources for treating hydrocarbon containing formations

High temperature methods for forming oxidizer fuel

Heating subsurface formations by oxidizing fuel on a fuel carrier

Cryogenic treatment of gas

Methods for forming long subsurface heaters

Ranging methods for developing wellbores in subsurface formations

Methods for forming wellbores in heated formations

Induction heaters used to heat subsurface formations

Multi-step heater deployment in a subsurface formation

In situ oxidation of subsurface formations

Three-phase heaters with common overburden sections for heating subsurface formations

CONTINUOUS SUBSURFACE HEATER TEMPERATURE MEASUREMENT

Load tap changer

Preventive maintenance tapping and duty cycle monitor for voltage regulator

Diverter switch, a method for operating such a switch and use of such a switch

Tap change operation monitoring apparatus for on-load tap charger

Control system for a transformer or reactor

Apparatus and method for control of high intensity discharge lighting

On-load transformer tap changing system

Preventive maintenance tapping and duty cycle monitor for voltage regulator

Tap changer monitoring