| Patents for H01F 29 - Variable transformers or inductances not covered by group (3,889) |
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| 08/10/2011 | CN102148095A Bar-shaped tapping switch for respective voltage regulation in conversion of two voltage classes by single control system |
| 08/10/2011 | CN102148094A Direct-current excitation controlled saturable reactor |
| 08/10/2011 | CN101506913B A resistor for electric high-voltage apparatus and a method of mounting a resistor |
| 08/10/2011 | CN101395555B A hybrid on-load tap changer and a method of operating the same |
| 08/04/2011 | DE102010006308A1 Laststufenschalter OLTC |
| 08/02/2011 | CA2376185C Charge transfer apparatus and method therefore |
| 07/27/2011 | CN102136355A Dual on-load tap changer |
| 07/27/2011 | CN102136354A Large-range on-load tap changer (OLTC) for testing |
| 07/27/2011 | CN101533707B Contact set for rotary-core voltage regulators |
| 07/20/2011 | EP2139089B1 Transformation device for automatically adjusting voltage of three-phase power supply |
| 07/20/2011 | CN101577174B MEMS adjustable inductor of static driving conductor thin film and manufacturing method thereof |
| 07/19/2011 | US7982442 Power system |
| 07/14/2011 | WO2011082528A1 Moving contact for oil-immersed load switch |
| 07/13/2011 | CN102122821A Method for inhibiting power frequency voltage from being raised after switch-on of ultrahigh and extra-high voltage no-load line |
| 07/06/2011 | CN201893280U On-off device for driving vacuum arc extinguish chamber by radial cam |
| 07/06/2011 | CN201893228U Resistor holder capable of being positioned in cylindrical insulating tube |
| 07/06/2011 | CN1967745B Reactance device |
| 07/06/2011 | CN102117694A High-voltage 10KV and 20KV convertible underground transformer |
| 07/06/2011 | CN101477885B Non-exciting shunting switch convenient for shifting |
| 06/30/2011 | WO2011076309A1 Step switch comprising a polarity switch for a variable transformer |
| 06/29/2011 | EP1864305B1 On-load tap changer |
| 06/29/2011 | CN201886894U Adjustable low-voltage current transformer |
| 06/29/2011 | CN201886884U Control indication mechanism for tap switch |
| 06/23/2011 | WO2011073771A1 Transformer |
| 06/23/2011 | WO2011072460A1 Alternating-current stepped controllable paralleling single/three-phase reactor |
| 06/15/2011 | CN201868181U Dual-voltage power transformer |
| 06/15/2011 | CN102097246A Rotational structure of vacuum on-load tap changer (OLTC) |
| 06/15/2011 | CN102097230A Self-locking device for off-circuit tap-changer hand operation mechanism |
| 06/15/2011 | CN101697312B Low-voltage dual-voltage on-load-tap-changing auto-transformer |
| 06/15/2011 | CN101697310B Winding connection structure for double-active-part on-load-tap-changing auto-transformer |
| 06/14/2011 | US7961071 Multiphase inductor and filter assemblies using bundled bus bars with magnetic core material rings |
| 06/09/2011 | WO2011068044A1 Voltage transformer |
| 06/09/2011 | DE202011005058U1 Transformator mit Stellvorrichtung Transformer with locking device |
| 06/08/2011 | CN201859757U Energy-saving on-load capacity regulating amorphous alloy transformer |
| 06/08/2011 | CN201859756U Shielding structure of drum-shaped excitation-free tap switch insulating cylinder |
| 06/08/2011 | CN101651029B Vacuum vessel switching core used by on-load tap-changer |
| 05/26/2011 | WO2011060779A1 Continuously adjustable transformer |
| 05/25/2011 | CN201845670U Crank rocker type quick mechanism |
| 05/25/2011 | CN201845649U Oil-immersed dual-voltage on-load voltage regulating transformer |
| 05/25/2011 | CN1790562B Magnetic core comprising a bond magnet including magnetic powder whose particle's surface is coated with oxidation-resistant metal |
| 05/25/2011 | CN102077306A Method for switching without any interruption between winding taps on a tap-changing transformer |
| 05/25/2011 | CN102077305A Tap switch with semiconductor switching elements |
| 05/24/2011 | US7948350 Coil component |
| 05/19/2011 | DE102009044571A1 Stufenloser Stelltransformator Infinitely variable transformer |
| 05/18/2011 | CN201838448U On-load voltage regulation device of power transformer |
| 05/18/2011 | CN201838447U Transformer module with multiple protection mechanisms |
| 05/18/2011 | CN102064013A Adjustable low-voltage current transformer |
| 05/12/2011 | DE102009060132B3 Stufenschalter mit Polungsschalter an einem Regeltransformator Step switch with polarity to a control transformer |
| 05/11/2011 | EP2319059A1 Tap switch with semiconductor switching elements |
| 05/11/2011 | EP2319058A1 Method for switching without any interruption between winding taps on a tap-changing transformer |
| 05/11/2011 | CN201829366U Tension-spring-type moving contact for on-load tapping switch |
| 05/11/2011 | CN102054600A High-low shifting column change-over switch |
| 05/11/2011 | CN101692394B Linked voltage regulation non-excitation tap switch |
| 05/11/2011 | CN101692392B Non-excitation cage-type positive and negative voltage regulation tap switch for transformer |
| 05/11/2011 | CN101661833B Excitation-free cage type tapping switch for transformer |
| 05/11/2011 | CN101640104B On-line oil filter device of on-load tap-changer |
| 05/05/2011 | US20110102118 Manual drive for a tap changer for tap-changing transformers |
| 05/04/2011 | CN201820621U Single core column and single coil adjustable reactor |
| 05/04/2011 | CN201820620U Small-capacity transformer |
| 05/04/2011 | CN201820619U Multi-voltage dry transformer used in explosive gas environment |
| 05/04/2011 | CN102044348A Polarity contact bridge apparatus and tap selector |
| 04/27/2011 | CN201812659U Parallel connection device for moving contact of OLTC |
| 04/27/2011 | CN201812658U Optical control electronic type intermediate voltage regulation on-load tap changer |
| 04/27/2011 | CN201812657U Air-core reactor |
| 04/27/2011 | CN102034595A Center tapped transformers for isolated power converters |
| 04/26/2011 | US7932802 Meander inductor and substrate structure with the same |
| 04/26/2011 | US7932800 Method and apparatus for three-dimensional integration of embedded power module |
| 04/20/2011 | EP2312596A2 SIP (symmetrical-in-parallel) induction coils for electromagnetic devices |
| 04/20/2011 | CN201804689U Equal stage differential type single body on-load voltage-regulating transformer |
| 04/20/2011 | CN201804688U Three-phase oil-immersed 110kV high-capacity straight step-down silicon carbide transformer coil |
| 04/20/2011 | CN201804687U 干式真空有载分接开关 Dry vacuum load tap changer |
| 04/20/2011 | CN201804686U Connecting structure of no-load regulating transformer and regulating transformer at irregular terrains |
| 04/20/2011 | CN201804685U Structure for connecting no-load regulating transformer and regulating transformer |
| 04/20/2011 | CN1971778B Single-phase self-coupling on-load voltage-regulating transformer |
| 04/20/2011 | CN1937116B On-line oil-filtering apparatus of loaded tap changer |
| 04/20/2011 | CN102024552A Large-rotating angle quick mechanism used for on-load tap-changer |
| 04/20/2011 | CN101477884B Non-exciting shunting switch for positive and negative voltage regulating |
| 04/20/2011 | CN101383221B Three phase reactor on-load tap-changer |
| 04/20/2011 | CN101286722B Step control device and control method for antiskid crosspiece of loaded pressure regulating switch of transformer |
| 04/14/2011 | WO2011042070A1 Tap changer |
| 04/14/2011 | DE102009048813A1 Stufenschalter Tap changer |
| 04/13/2011 | EP1562508B1 System for heating a biological site in a patient s body |
| 04/13/2011 | CN201796789U Limit device for manual control mechanism of off-circuit tap-changer |
| 04/13/2011 | CN201796713U Seal cover for tap switch of transformer |
| 04/13/2011 | CN201796712U 磁阀式可控电抗器 Magnetic valve controllable reactor |
| 04/13/2011 | CN201796711U Three-phase three-pole double-power amorphous alloy transformer |
| 04/13/2011 | CN201796710U Three-phase three-column dual-power amorphous-alloy dry-type transformer |
| 04/13/2011 | CN201796698U High-voltage five-range voltage-regulating tapping terminal structure |
| 04/13/2011 | CN101127273B Mechanical limit device of tapping switch electric device |
| 04/07/2011 | DE102009043171A1 Stufenschalter mit Vakuumschaltröhren Tap changer with vacuum interrupters |
| 04/06/2011 | CN201788838U Coupling for tap switch |
| 04/06/2011 | CN201788837U Tap selector for tap switch |
| 04/06/2011 | CN201788836U Moving contact for tap switch |
| 04/06/2011 | CN201788811U Manual operating device of non-excited tap switch |
| 04/06/2011 | CN201788810U Double-layer connected electric-conduction static contact applied to on load tap changer |
| 04/06/2011 | CN201788809U Connected electric-conduction static contact applied to on load tap changer |
| 04/05/2011 | CA2352070C Hybrid tap-changing transformer with full range of control and high resolution |
| 03/31/2011 | WO2011035394A1 A fault current limiter |
| 03/31/2011 | DE202011001893U1 Induktiver Lastschalter Inductive load switch |
| 03/31/2011 | CA2774994A1 A fault current limiter |