| Patents for H01F 29 - Variable transformers or inductances not covered by group (3,889) |
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| 04/17/2013 | CN202888001U Maintenance-free energy-saving on-load capacity regulating switch |
| 04/17/2013 | CN202887961U Voltage regulator for uninterrupted power supply (UPS) by-pass cabinet |
| 04/17/2013 | CN202887960U Guard plate of transformer load switch rupture membrane |
| 04/17/2013 | CN202887959U High voltage D on-load tap changing transformer |
| 04/17/2013 | CN202887958U On-load multistage controllable-capacity tap switch |
| 04/17/2013 | CN202887957U Double-split rectifier transformer used by dual circuit |
| 04/17/2013 | CN202887956U Single phase-shift pressure regulating rectifier transformer |
| 04/17/2013 | CN103050260A 330kV-level three-phase three-winding high-impedance power auto-transformer with function of on-load voltage regulation |
| 04/17/2013 | CN103050259A On-load tap changer |
| 04/17/2013 | CN103050258A Light and efficient voltage-continuous type alternating current voltage regulator |
| 04/17/2013 | CN103050257A Low-voltage regulating transformer |
| 04/17/2013 | CN103050256A High-voltage strip coarse-fine voltage adjusting power transformer |
| 04/17/2013 | CN103050255A High-capacity double-generator transformer with function of low voltage radial splitting |
| 04/17/2013 | CN103050254A Single-phase low-voltage double-split transformer with functions of dual high voltage and off-circuit voltage regulation |
| 04/17/2013 | CN102187410B Variable inductor |
| 04/11/2013 | WO2013018072A3 Emulator device for emulating a variable impedance and a system for controlling and regulating the state of a neutral conductor in a polyphase system comprising such a device |
| 04/11/2013 | WO2013014251A3 Switching device |
| 04/10/2013 | CN202871538U Voltage conversion plate of impact transformer |
| 04/10/2013 | CN202871537U Active field full-magnetic shielding mouse cage shape adjustable reactor |
| 04/10/2013 | CN103038845A Switching arrangement |
| 04/10/2013 | CN103038841A On-load tap changer |
| 04/10/2013 | CN103035384A 6kV/10kV changeover dual-purpose distribution transformer |
| 04/04/2013 | WO2013048908A1 Switchable transformer with embedded switches inside the windings |
| 04/04/2013 | WO2013048348A1 Device and testing procedure for determination of magnetic circuit quality |
| 04/04/2013 | US20130082810 Switchable transformer with embedded switches inside the windings |
| 04/03/2013 | CN202855568U Tap changing switch |
| 04/03/2013 | CN202855567U Tap changing switch |
| 04/03/2013 | CN202855516U Pillar-type voltage regulator |
| 04/03/2013 | CN202855515U On-load voltage regulating capacity regulating transformer |
| 04/03/2013 | CN103026433A On-load tap changer |
| 04/03/2013 | CN103023347A Novel on-load-tap-changing combined rectifier auto-transformer with independent ends |
| 04/03/2013 | CN103021642A On-load tapping switch |
| 04/03/2013 | CN103021641A Distribution transformer for conversion between 10KV and 20KV |
| 04/03/2013 | CN102097230B Self-locking device for off-circuit tap-changer hand operation mechanism |
| 03/28/2013 | WO2013042685A1 On-load tap changing device and energizing mechanism thereof |
| 03/27/2013 | CN202839359U Sealing cover for adjustable-capacity transformer off-circuit tap-changer |
| 03/27/2013 | CN202839275U Pressure regulating rectifier transformer special for aluminum foil formation |
| 03/27/2013 | CN202839272U Electron beam transformer |
| 03/27/2013 | CN202839271U Extra-high voltage transformer |
| 03/27/2013 | CN103000360A 10kV-20kV voltage transformer and voltage changing method |
| 03/27/2013 | CN102077306B Method for switching without any interruption between winding taps on a tap-changing transformer |
| 03/21/2013 | DE102011113718A1 Laststufenschalter OLTC |
| 03/20/2013 | EP2569787A1 Switching arrangement |
| 03/20/2013 | EP2569785A1 Tap changer for a transformer |
| 03/20/2013 | EP2569782A2 On-load tap changer |
| 03/20/2013 | EP2569781A2 On-load tap changer |
| 03/20/2013 | CN202816699U Self-positioning movable contact of excitation-free strip-type tap switch |
| 03/20/2013 | CN202816698U Series-parallel connection method on-load capacity-regulating series multi-break switch |
| 03/20/2013 | CN202816624U Screw contact type voltage regulator |
| 03/20/2013 | CN202816623U Feeder line automatic voltage regulation device |
| 03/20/2013 | CN202816622U Combination type insulation device |
| 03/20/2013 | CN202816621U Cylindrical coil structure for multi-stage capacity regulating transformer |
| 03/20/2013 | CN202816620U High-power high-frequency transformer |
| 03/20/2013 | CN202816619U Extra-high voltage transformer |
| 03/20/2013 | CN202816602U Layer coil structure applied to voltage regulation of 110kV transformer |
| 03/20/2013 | CN202816558U Novel on-load switch bracket of transformer |
| 03/20/2013 | CN102982985A Multi-tap composite excitation type controllable reactor |
| 03/20/2013 | CN102148095B Bar-shaped tapping switch for respective voltage regulation in conversion of two voltage classes by single control system |
| 03/20/2013 | CN101807475B Dual voltage switch |
| 03/13/2013 | CN202796522U Excitation-free tap switch shielding cover |
| 03/13/2013 | CN202796521U Off-circuit tap-changer shielding cover |
| 03/13/2013 | CN202796518U Load switching device for tap switch of adjustable transformer |
| 03/13/2013 | CN202796517U Load switching device for tap switch of staged transformer |
| 03/13/2013 | CN202796490U Non-excitation bar shaped tap switch |
| 03/13/2013 | CN202796489U Electroless on-load tap switch shifting structure |
| 03/13/2013 | CN202796396U On-load capacitance-adjusting voltage-adjusting tapping switch |
| 03/13/2013 | CN202796395U Load tap changer |
| 03/13/2013 | CN202796394U Load tap non-arc switch core |
| 03/13/2013 | CN202796393U Load tap changer |
| 03/13/2013 | CN202796392U Dual-purpose transformer |
| 03/13/2013 | CN202796391U Low voltage double-voltage transformer |
| 03/13/2013 | CN202796390U Compatible type fan testing transformer and double-fed fan transmission testing system and total power testing system of fluid coupling type double-fed fan |
| 03/13/2013 | CN202796370U Pin configuration of combined type on-load tap-changer |
| 03/13/2013 | CN202796329U Load tap changer oil conservator |
| 03/13/2013 | CN202794111U On-load tap changer monitor |
| 03/13/2013 | CN202793616U On-load tap switch temperature sensing device |
| 03/13/2013 | CN202793577U On-load tap switch oscillation detection device |
| 03/13/2013 | CN102360849B Double-high and low voltage on-load regulating transformer |
| 03/13/2013 | CN101572174B Unloading off-circuit tapping switch |
| 03/07/2013 | WO2013030571A1 Fault current limiter |
| 03/07/2013 | WO2013030139A1 Dry-type transformer |
| 03/07/2013 | WO2013029688A1 Current limiter |
| 03/07/2013 | US20130057248 On-load tap changer |
| 03/07/2013 | CA2847016A1 Fault current limiter |
| 03/06/2013 | EP2565881A1 Dry-type transformer |
| 03/06/2013 | CN202772578U Energy-saving type transformer capable of preventing electricity stealing |
| 03/06/2013 | CN202771971U Off-circuit tap changer structure |
| 03/06/2013 | CN202771936U Amorphous alloy transformer |
| 03/06/2013 | CN202771869U Transition resistor for on-load tap-changer |
| 02/28/2013 | WO2012028839A3 Improved apparatus & method in relation to voltage optimization |
| 02/27/2013 | EP2562772A2 Inductive unit |
| 02/27/2013 | CN202759249U Magnetic control parallel reactor |
| 02/27/2013 | CN202758723U De-icing transformer |
| 02/27/2013 | CN202758722U Three-phase on load tap changing transformer |
| 02/27/2013 | CN202758721U Converting device |
| 02/27/2013 | CN102947909A Tap changer |
| 02/27/2013 | CN102947902A On-load tap changer |
| 02/21/2013 | WO2013025701A1 A transformer tap projection and cover |
| 02/20/2013 | EP2560174A1 Three-phase electrical reactor with magnetic biasing |
| 02/20/2013 | CN202749252U Fast switch mechanism for on-load tap-changer |