JPS5484231A - Protecting method of inverter device - Google Patents
Protecting method of inverter deviceInfo
- Publication number
- JPS5484231A JPS5484231A JP15208877A JP15208877A JPS5484231A JP S5484231 A JPS5484231 A JP S5484231A JP 15208877 A JP15208877 A JP 15208877A JP 15208877 A JP15208877 A JP 15208877A JP S5484231 A JPS5484231 A JP S5484231A
- Authority
- JP
- Japan
- Prior art keywords
- thyristors
- inverter device
- time
- set value
- specified
- 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.)
- Pending
Links
Landscapes
- Inverter Devices (AREA)
Abstract
PURPOSE: To intend to improve excess current detecting sensitivity of an inverter device at starting time, and improve protective capacity, by making the inverter device to start at a specified set value, and making set value to increase upto a specified value after elaspe of a constant value.
CONSTITUTION: When a starting switch 15 is made, Ic and Ip2 are input in a comparator 12, before a condenser 7 is charged in this state, thyristors 9, 10 are transmited, and when excess current is currented, detecting current Ic is increased, and a breaker 3 is opened at Ic>Ip2. Since breaking instruction is issued at smaller point of electric current by this operation, calorie which are generated at the thyristors 9, 10 can be remarkablly reduced. Next, elasping a specified time after starting, time delay relay 18 is operated, and set value is changed from Ip2 Ip1. From this, since detecting sensitivity of excess current at strating time, protection to failure of commutation of the thyristors can be rapidly done, before filter condenser is charged.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15208877A JPS5484231A (en) | 1977-12-16 | 1977-12-16 | Protecting method of inverter device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15208877A JPS5484231A (en) | 1977-12-16 | 1977-12-16 | Protecting method of inverter device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5484231A true JPS5484231A (en) | 1979-07-05 |
Family
ID=15532776
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15208877A Pending JPS5484231A (en) | 1977-12-16 | 1977-12-16 | Protecting method of inverter device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5484231A (en) |
-
1977
- 1977-12-16 JP JP15208877A patent/JPS5484231A/en active Pending
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