JPS642232A - Overload protection device - Google Patents

Overload protection device

Info

Publication number
JPS642232A
JPS642232A JP15544087A JP15544087A JPS642232A JP S642232 A JPS642232 A JP S642232A JP 15544087 A JP15544087 A JP 15544087A JP 15544087 A JP15544087 A JP 15544087A JP S642232 A JPS642232 A JP S642232A
Authority
JP
Japan
Prior art keywords
motor
fixed terminal
bimetal
heater
wire portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP15544087A
Other languages
Japanese (ja)
Other versions
JP2796294B2 (en
JPH012232A (en
Inventor
Hiroyasu Owada
Morio Kobayashi
Toshio Shimada
Kenji Kanai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP62155440A priority Critical patent/JP2796294B2/en
Publication of JPH012232A publication Critical patent/JPH012232A/en
Publication of JPS642232A publication Critical patent/JPS642232A/en
Application granted granted Critical
Publication of JP2796294B2 publication Critical patent/JP2796294B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Thermally Actuated Switches (AREA)
  • Fuses (AREA)

Abstract

PURPOSE: To prevent a motor coil from burning by providing a connecting part with a fuse between a 1st fixed terminal and a 2nd fixed terminal.
CONSTITUTION: A fine wire portion 13 of a small cross-sectional area as a fuse means is provided at a part of a heater wire 12 connecting a 1st fixed terminal 9 passed through and fixed at the bottom 1a of a case 1 to a heater terminal 11 of a 2nd fixed terminal. Consequently, if a large locked-rotor current caused by motor abnormality flows, self-generated heat in a bimetal 5 and the heater wire 12 increases, and finally the current to the motor is shut off. And if a contact point fusion occurs as a result of fatigue failure of the bimetal during repeated movements of action and reset, the bimetal 5 is continuously energized and also a large locked-rotor current flows through the heater wire 12. If the temperature to be reached at this time is set above the fusing temperature of the fine wire portion 13, the fine wire portion 13 first melts and breaks to shut off the power to the motor.
COPYRIGHT: (C)1989,JPO&Japio
JP62155440A 1987-06-24 1987-06-24 Overload protection device Expired - Fee Related JP2796294B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62155440A JP2796294B2 (en) 1987-06-24 1987-06-24 Overload protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62155440A JP2796294B2 (en) 1987-06-24 1987-06-24 Overload protection device

Publications (3)

Publication Number Publication Date
JPH012232A JPH012232A (en) 1989-01-06
JPS642232A true JPS642232A (en) 1989-01-06
JP2796294B2 JP2796294B2 (en) 1998-09-10

Family

ID=15606078

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62155440A Expired - Fee Related JP2796294B2 (en) 1987-06-24 1987-06-24 Overload protection device

Country Status (1)

Country Link
JP (1) JP2796294B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02227928A (en) * 1989-03-01 1990-09-11 Susumu Ubukata Thermal reaction switch
JPH03289020A (en) * 1990-04-06 1991-12-19 Hitachi Ltd Overload protecting device for motor
US5350336A (en) * 1993-04-23 1994-09-27 Industrial Technology Research Institute Building and method for manufacture of integrated semiconductor circuit devices
JP2013525981A (en) * 2010-04-29 2013-06-20 シェンゼェン ビーワイディー オート アールアンドディー カンパニー リミテッド fuse
CN104641443A (en) * 2012-10-17 2015-05-20 矢崎总业株式会社 Electrical wire fuse

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59105755U (en) * 1982-12-29 1984-07-16 松下電工株式会社 Protective devices for electrical equipment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59105755U (en) * 1982-12-29 1984-07-16 松下電工株式会社 Protective devices for electrical equipment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02227928A (en) * 1989-03-01 1990-09-11 Susumu Ubukata Thermal reaction switch
JPH03289020A (en) * 1990-04-06 1991-12-19 Hitachi Ltd Overload protecting device for motor
US5350336A (en) * 1993-04-23 1994-09-27 Industrial Technology Research Institute Building and method for manufacture of integrated semiconductor circuit devices
JP2013525981A (en) * 2010-04-29 2013-06-20 シェンゼェン ビーワイディー オート アールアンドディー カンパニー リミテッド fuse
CN104641443A (en) * 2012-10-17 2015-05-20 矢崎总业株式会社 Electrical wire fuse

Also Published As

Publication number Publication date
JP2796294B2 (en) 1998-09-10

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees