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