Patents
Patents for H01H 81 - Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting (367)
03/2003
03/20/2003US20030052756 Switching method for an electromagnetic switching device and an electromagnetic switching device corresponding thereto
02/2003
02/25/2003US6525640 Resistive thermostat for electrical motors protection
02/20/2003WO2003015115A1 Current-limiting device with liquid metal
01/2003
01/08/2003CN1389888A Overload protection device, electric compressor and refrigerating air-conditioner apparatus
01/02/2003EP1269597A1 Switching method for an electromagnetic switching device and an electromagnetic switching device corresponding thereto
01/02/2003EP1190428B1 Operating mechanism for autorecloser with series disconnector
10/2002
10/31/2002US20020158746 Hermetic single phase motor protector
10/17/2002DE10116894A1 Current limiting contact device for mechanically-operated electric switch, uses contact elements loosely packed together in housing with assisted contact pressure between them
09/2002
09/11/2002CN2510989Y Electric current controller
08/2002
08/13/2002US6433975 Motor protector apparatus
07/2002
07/10/2002CN1087481C Apparatus and method for controlling electric motor
07/03/2002CN1357152A Operating mechanism for autorecloser with series disconnector
06/2002
06/05/2002EP1211708A2 Hermetic single phase motor protector
05/2002
05/22/2002CN2492956Y Safety socket
03/2002
03/27/2002EP1190428A1 Operating mechanism for autorecloser with series disconnector
02/2002
02/21/2002WO2002015357A1 Protective circuit for protecting an electric circuit from excessive currents or voltages
01/2002
01/31/2002US20020011915 Thermal Protector
01/31/2002US20020011908 Circuit breaker with electro-magnetic trip apparatus
01/02/2002CN2469548Y High-speed current-limiting protector for resistance variety
12/2001
12/26/2001CN1328372A Cable fixed zero-power miniaturized over-current relay
12/12/2001CN2465437Y Gas discharging switch
12/06/2001WO2001093290A1 Circuit breaker with electro-magnetic trip apparatus
10/2001
10/24/2001CN2456303Y Overload protecting switch
10/18/2001WO2001078210A1 Switching method for an electromagnetic switching device and an electromagnetic switching device corresponding thereto
10/17/2001CN2454893Y Delayed over-heat protector
10/17/2001CN2454892Y Intelligent high-precision current-limiting knife switch
09/2001
09/26/2001CN2450780Y Electronic current-limiting adjustable circuit breaker
08/2001
08/15/2001CN2443485Y Heat protector for compressor
05/2001
05/23/2001CN2431640Y Temp current double-function protector
05/09/2001CN2429938Y Temperature controlling protector for electric power plug
05/09/2001CN2429937Y Temperature controlling protector for power supply socket
04/2001
04/18/2001CN2427014Y Overload protecting device for earth leakage protective device
01/2001
01/03/2001CN2413381Y Safety thermal protector for multiple electrical equipment
12/2000
12/07/2000WO2000074095A1 Operating mechanism for autorecloser with series disconnector
12/07/2000CA2373539A1 Operating mechanism for autorecloser with series disconnector
11/2000
11/15/2000CN2406331Y Fire-retardant general power-supply switch
08/2000
08/23/2000CN2393248Y Multi-function fully-automatic resetting safety device
08/23/2000CN1264150A Method and device for presetting actuation current value of electromagnetic short-circuit protector for miner's lamp
08/02/2000CN1055177C Safety fire-proof energy-saving switch circuit
07/2000
07/18/2000US6091316 Switch having a temperature-dependent switching mechanism
03/2000
03/08/2000CN1050218C Self-restoring fuse tube
01/2000
01/26/2000EP0974997A2 Fault current tolerable contactor
01/26/2000CN1242586A Fault current tolerable contactor
01/12/2000CN2358551Y Safety overcurrent superheat protector
12/1999
12/22/1999CN2355425Y Thermal relays with contact plates
11/1999
11/03/1999CN2347266Y 电器保护器 Electrical protection
10/1999
10/06/1999CN1230816A Motor protector apparatus
09/1999
09/28/1999US5959517 Fault current tolerable contactor
08/1999
08/18/1999CN2334093Y Short-circuit protection
08/04/1999CN2332065Y Lurrent temp. thermal protector
05/1999
05/12/1999EP0915491A2 Switch with a temperature sensitive switching mechanism
03/1999
03/10/1999CN1210354A Apparatus and method for controlling electric motor
02/1999
02/24/1999EP0898293A2 Apparatus and method for controlling an electric motor apparatus
01/1999
01/13/1999CN2304183Y Relay-type protector for refrigerator
12/1998
12/29/1998US5854584 Protective device against thermal overload for a small high-heat-load electric motor
11/1998
11/04/1998EP0714550B1 Electric switches
10/1998
10/27/1998US5828284 Circuit overload protective device
10/27/1998US5828196 Apparatus and method for controlling an electric motor
09/1998
09/09/1998CN1039754C Improvement relating to electric switches
08/1998
08/26/1998EP0860927A1 Protection circuit arrangement for surge arrester
08/18/1998US5796327 Thermally responsive electrical switches
08/05/1998CN2287339Y Protector for motor of refrigerating compressor
05/1998
05/26/1998US5757261 Temperature controller having a Bimetallic element and plural heating components
04/1998
04/28/1998US5745022 Bimetallic temperature controller having a resistor for self-locking function and a resistor for excess current protection
04/22/1998CN2279694Y Double-metal plate thermal relay
04/08/1998EP0782757B1 Power limiting device for electric installation
02/1998
02/18/1998CN1173729A Self-restoring fuse tube
02/11/1998CN1173034A Safety fireproof energy-saving switch circuit for lighting system
01/1998
01/14/1998EP0754347B1 Protective device against thermal overload for a small high-heat-load electric motor
12/1997
12/03/1997CN1166685A Supervoltage compensated arc-less limiting breaker
11/1997
11/04/1997US5684447 Failsafe bimetallic reed having bimetal with fusible link for a circuit protector
10/1997
10/22/1997EP0685107B1 Improvements relating to electric switches
10/08/1997CN2264413Y Multifunctional electronic a.c switch of color television
10/01/1997CN1036035C Overload protective apparatus utilizing a bimetal sheet
09/1997
09/24/1997CN2263397Y Bimetallic strip current temp. overheat protector
07/1997
07/09/1997EP0782757A1 Power limiting device for electric installation
06/1997
06/11/1997CN2256164Y Module assembled thermal protector
05/1997
05/06/1997US5627506 Overload protector
04/1997
04/16/1997CN2252404Y Multiple used safety tube
01/1997
01/29/1997EP0756302A2 Thermostat of modular construction
01/29/1997EP0756301A2 Thermostat
01/29/1997CN2246331Y Electromagnetic motor protector
09/1996
09/25/1996CN1132000A Improvements relating to electric switches
06/1996
06/19/1996CN2229717Y Protective unit thermal sensitive self-resetting device
06/05/1996EP0714550A1 Electric switches
03/1996
03/28/1996WO1996009634A1 Power limiting device for electric installation
03/05/1996US5497286 Overload protective apparatus utilizing a bimetal
12/1995
12/06/1995EP0685107A1 Improvements relating to electric switches.
10/1995
10/12/1995WO1995027302A1 Protective device against thermal overload for a small high-heat-load electric motor
10/12/1995DE4411712A1 Schutzeinrichtung gegen Wärmebelastung eines Elektrokleinmotors für hohe thermische Belastbarkeit Guard against heat load of a small electric motor for high thermal resistance
10/04/1995CN1109631A High frequency electron circuit over-current protective method and over-current protector
08/1995
08/16/1995CN2205593Y Marmen current limiting protector
07/1995
07/27/1995WO1995020234A1 Improved breaker or resettable fuse device
05/1995
05/30/1995US5420561 Breaker or resettable fuse device
04/1995
04/20/1995DE4335639A1 Thermostatic switch having a bimetallic snap-action disc and electrical/thermal prevention of the bimetallic snap-action disc snapping back automatically
03/1995
03/30/1995WO1995004364A3 Improvements relating to electric switches
02/1995
02/09/1995WO1995004364A2 Improvements relating to electric switches
11/1994
11/23/1994CN2183612Y Over-current protector for high-frequency electronic circuit
11/09/1994CN2182483Y Portector for electric machine
09/1994
09/14/1994CN2177288Y Over-current counter time limit delay relay
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