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Class Information
Number: 361/37
Name: Electricity: electrical systems and devices > Safety and protection of systems and devices > Transformer protection > With temperature or pressure sensing means
Description: Subject matter including means responsive to an abnormal temperature or pressure caused by a fault condition.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8643984 Engine system in which transformer is arranged in independent ventilation path Feb. 4, 2014
8514528 Method of protection from over-temperature and corresponding arrangement Aug. 20, 2013
8502485 Motor drive circuitry Aug. 6, 2013
8491187 Temperature detection apparatus Jul. 23, 2013
8351169 System and method for preventing, protecting OLTC from fire and/or transformer from explosion Jan. 8, 2013
8274769 Apparatus and method for cooling power transformers Sep. 25, 2012
8264804 Device for preventing the explosion of an element of an electrical transformer Sep. 11, 2012
8044624 Load control apparatus and method for processing diagnosis signal for the same Oct. 25, 2011
7889463 Fused lead wire for ballast protection Feb. 15, 2011
7869167 Method and device for prevention and protection of electrical transformer against explosion and fire Jan. 11, 2011
7777994 Device for preventing the explosion of an element of an electrical transformer Aug. 17, 2010
7755868 Electrical equipment for distribution network Jul. 13, 2010
7723938 Control system for multiphase rotary electric machine May. 25, 2010
7597309 Constant-rate volatile material dispensing device Oct. 6, 2009
7558032 Protection system for medium-voltage potential transformers Jul. 7, 2009
7317598 Electric transformer explosion prevention device Jan. 8, 2008
6847187 Detection of loss of cooling air to traction motors Jan. 25, 2005
6804092 Device for prevention against explosion of electrical transformers Oct. 12, 2004
6714022 Apparatus and method for cooling power transformers Mar. 30, 2004
6662122 Method for the controlled proportioning of liquids while dislocating a gas cushion Dec. 9, 2003
6567249 Transformer with electrical isolation protection and power supply unit or voltage converter with a transformer of this type May. 20, 2003
6144160 Lamp with a temperature-controlled automatically protecting circuit Nov. 7, 2000
5949343 Supervisory apparatus for oil-filled electrical equipment Sep. 7, 1999
5946171 Method and device for prevention against explosion and fire of electrical transformers Aug. 31, 1999
5898556 Protection system for a three-phase distribution transformer insulated in a liquid dielectric Apr. 27, 1999
5717257 Thermal switch for electrical load Feb. 10, 1998
5625520 Device for preventing a high voltage transformer of a microwave oven from being overheated Apr. 29, 1997
5534853 Electronic apparatus for measuring the parameters of an oil transformer Jul. 9, 1996
5463522 Housing and mounting arrangement for thermal protector device Oct. 31, 1995
5436511 Apparatus for interrupting supply of power from power system to portion of consumer load in response to control signal from power system Jul. 25, 1995
5388451 High voltage transmission switching apparatus with gas monitoring device Feb. 14, 1995
5303160 Load controller with digitally modeled overload protection and analog tracking of heat state during power off Apr. 12, 1994
5078078 Transformer internal fault warning indicator Jan. 7, 1992
4951168 Transformers having overload protection Aug. 21, 1990
4903160 Sudden, pressure relay supervisory apparatus Feb. 20, 1990
4823224 Rapid pressure rise circuit Apr. 18, 1989
4799166 Apparatus for automatically analyzing gases in oil Jan. 17, 1989
4796143 Electric transformer for underground mining machine Jan. 3, 1989
4754405 Tri-phase electronic temperature controller Jun. 28, 1988
4745571 Modular electronic temperature controller May. 17, 1988
4737878 Overload switch Apr. 12, 1988
4709291 Protective device for preventing blowout of bushing in high-voltage switching installation Nov. 24, 1987
4658322 Arcing fault detector Apr. 14, 1987
4623265 Transformer hot-spot temperature monitor Nov. 18, 1986
4549817 Thermal monitoring apparatus for transformers or chokes Oct. 29, 1985
4550298 Trip assembly for a circuit breaker Oct. 29, 1985
4435690 Primary circuit breaker Mar. 6, 1984
4321421 Vaporization cooled transformer having a high voltage Mar. 23, 1982
4282422 Power control for appliance using multiple high inrush current elements Aug. 4, 1981
4249170 Annunciator Feb. 3, 1981

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