JPS5480532A - Protector for motor - Google Patents
Protector for motorInfo
- 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
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
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) |
-
1977
- 1977-12-09 JP JP14777577A patent/JPS5480532A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6159044B2 (en) | 1986-12-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5480532A (en) | Protector for motor | |
JPS54127548A (en) | Apparatus for protecting motor from impact load | |
EP0001003A3 (en) | Apparatus and method for operating a dynamo-eletric machine | |
JPS54111647A (en) | Protective relay apparatus for transformer | |
JPS53117727A (en) | Power converter protector | |
JPS5450944A (en) | Protective device for synchronous motor | |
JPS5320549A (en) | Circuit breaker | |
JPS5410402A (en) | Protection device for recycling pump | |
JPS5321733A (en) | Protective device for inverter | |
JPS52150537A (en) | Step-out detector | |
JPS5317948A (en) | Protective circuit for overcurrent | |
JPS5285353A (en) | Ac voltage control apparatus | |
JPS5248034A (en) | Protection circuit device | |
JPS52135033A (en) | Generator protective device | |
JPS5355757A (en) | Power line protection | |
JPS54115724A (en) | Current limiting method for motor | |
JPS55103073A (en) | Thyristor switch | |
JPS5288753A (en) | Static type voltage regulating system | |
JPS5321731A (en) | Inverter device | |
JPS548845A (en) | Phase-lack protection device | |
JPS52120353A (en) | Protective device for dc power transmission system | |
JPS6412815A (en) | Overload protection in parallel operation of diesel generator | |
JPS54730A (en) | Overcurrent protective equipment for inverter | |
JPS5357445A (en) | Control and protection process for dc power | |
JPS53139131A (en) | Thyristor overvoltage protection |