JPS5480532A - Protector for motor - Google Patents

Protector for motor

Info

Publication number
JPS5480532A
JPS5480532A JP14777577A JP14777577A JPS5480532A JP S5480532 A JPS5480532 A JP S5480532A JP 14777577 A JP14777577 A JP 14777577A JP 14777577 A JP14777577 A JP 14777577A JP S5480532 A JPS5480532 A JP S5480532A
Authority
JP
Japan
Prior art keywords
current level
motor
level
time constant
response level
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
JP14777577A
Other languages
Japanese (ja)
Other versions
JPS6159044B2 (en
Inventor
Yasuhiro Takabayashi
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP14777577A priority Critical patent/JPS5480532A/en
Publication of JPS5480532A publication Critical patent/JPS5480532A/en
Publication of JPS6159044B2 publication Critical patent/JPS6159044B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Protection Of Generators And Motors (AREA)

Abstract

PURPOSE: To prevent a motor from burning, by surely separately detecting the current level under the overload and the relatively nearby current level under the locking of the motor.
CONSTITUTION: The protector comprises a long time limiter 2 having a long time constant and a relatively low response level having such an anti-time-limiting property that the current level is inversely proportional to the time constant, a short time limiter 3 having a short time constant and a response level of such a low magneification that the response level is several times higher than a rated current level, and a unit 4 which instantaneously operates at a high response level if necessary. The limiters 3, 4 are installed in parallel with each other and are surely operated in their operation ranges. Thereby, the entire load circuit including the power source is protected from an accident such as burning due to an overload or a short- circuit.
COPYRIGHT: (C)1979,JPO&Japio
JP14777577A 1977-12-09 1977-12-09 Protector for motor Granted JPS5480532A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14777577A JPS5480532A (en) 1977-12-09 1977-12-09 Protector for motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14777577A JPS5480532A (en) 1977-12-09 1977-12-09 Protector for motor

Publications (2)

Publication Number Publication Date
JPS5480532A true JPS5480532A (en) 1979-06-27
JPS6159044B2 JPS6159044B2 (en) 1986-12-15

Family

ID=15437889

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14777577A Granted JPS5480532A (en) 1977-12-09 1977-12-09 Protector for motor

Country Status (1)

Country Link
JP (1) JPS5480532A (en)

Also Published As

Publication number Publication date
JPS6159044B2 (en) 1986-12-15

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