JPS54103528A - Motor protection relay device - Google Patents
Motor protection relay deviceInfo
- Publication number
- JPS54103528A JPS54103528A JP1071078A JP1071078A JPS54103528A JP S54103528 A JPS54103528 A JP S54103528A JP 1071078 A JP1071078 A JP 1071078A JP 1071078 A JP1071078 A JP 1071078A JP S54103528 A JPS54103528 A JP S54103528A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- becomes
- integral
- contact
- output
- 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
Abstract
PURPOSE: To protect a motor according to an output of an integral circuit by outputting an output proportional to a square of a load current from a primary delay circuit at a time of a motor load current being less than a rated current and by changing over the primary delay circuit to an integral circuit when a load current becomes more than a rated current.
CONSTITUTION: When a contact X of an over current detecting relay 9 of a thermal element detecting circuit becomes to be closed, one end of a variable resistance VR2 of a feed back circuit in an integral circuit 11 is grounded to zero potential by the contact X, therefore a feed back circuit becomes not to exist and it becomes a perfect integral circuit. An output of the integral circuit 11 begins from V1 and when this becomes to higher than a trip establishing level V2, a comparator circuit 12 reverses, a trip relay 14 is energized by a driver circuit 13, an electromagnetic switch 1 or a circuit breaker is made open by its contact Y and a motor 2 is protected.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53010710A JPS6043728B2 (en) | 1978-02-01 | 1978-02-01 | Protection relay device for 3-phase induction motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53010710A JPS6043728B2 (en) | 1978-02-01 | 1978-02-01 | Protection relay device for 3-phase induction motor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54103528A true JPS54103528A (en) | 1979-08-15 |
JPS6043728B2 JPS6043728B2 (en) | 1985-09-30 |
Family
ID=11757852
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53010710A Expired JPS6043728B2 (en) | 1978-02-01 | 1978-02-01 | Protection relay device for 3-phase induction motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6043728B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62143826U (en) * | 1986-03-06 | 1987-09-10 |
-
1978
- 1978-02-01 JP JP53010710A patent/JPS6043728B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6043728B2 (en) | 1985-09-30 |
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