JPS54125448A - Pilot wire protective relay device - Google Patents
Pilot wire protective relay deviceInfo
- Publication number
- JPS54125448A JPS54125448A JP3309578A JP3309578A JPS54125448A JP S54125448 A JPS54125448 A JP S54125448A JP 3309578 A JP3309578 A JP 3309578A JP 3309578 A JP3309578 A JP 3309578A JP S54125448 A JPS54125448 A JP S54125448A
- Authority
- JP
- Japan
- Prior art keywords
- switching
- pilot wire
- insulating
- danger
- high voltage
- 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
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE: To cut off the insulating current transformer to be excluded from pilot wire, by switching pilot wire with a switch through the insulating current transformer without danger of high voltage invasion.
CONSTITUTION: A switching device which is composed of contact points 53,54 for switcing to switch on and off pilot wire 20, relay 5 for switching to operate contact points for switching, and an insulating transformers 6, 7 for giving switching instruction to switching relay is provided, and selecting terminal to be stopped and terminal to be used, stopped condition or used condition is switched. Pilot wire with danger of high voltage invasion can be switched by pilot wire switching device through an insulating transformer without danger of high voltage invasion, and also, the insulating current transformer T to be excluded can be cut off from pilot wire. Still, switching condition can be maintained even at stoppage of electric source for switching.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3309578A JPS54125448A (en) | 1978-03-24 | 1978-03-24 | Pilot wire protective relay device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3309578A JPS54125448A (en) | 1978-03-24 | 1978-03-24 | Pilot wire protective relay device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54125448A true JPS54125448A (en) | 1979-09-28 |
Family
ID=12377096
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3309578A Pending JPS54125448A (en) | 1978-03-24 | 1978-03-24 | Pilot wire protective relay device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54125448A (en) |
-
1978
- 1978-03-24 JP JP3309578A patent/JPS54125448A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
BR8200555A (en) | ELECTRIC CIRCUIT SWITCH | |
ES2032840T3 (en) | ELECTRIC CIRCUIT BREAKER WITH SELF-EXPANSION AND WITH ROTATING ARC. | |
ATE63655T1 (en) | ARC FLUSHING DEVICE FOR ELECTRICAL SWITCHES. | |
ATE41263T1 (en) | SWITCHING DEVICE PROTECTED AGAINST SHORT-CIRCUIT CURRENT. | |
JPS54125448A (en) | Pilot wire protective relay device | |
SE8704180L (en) | circuit breaker | |
JPS5235569A (en) | Semiconductor switch device | |
DK0398213T3 (en) | Medium voltage switch for high rated current | |
JPS5395562A (en) | Switch | |
JPS5472439A (en) | Uniform-pressure underwater switchboard | |
JPS52149953A (en) | Transistor switch circuit | |
EP0212136A3 (en) | Earthing switch disposition for high-tension installations | |
HU185780B (en) | Method for switching off the short-circuit current of high-voltage apparatuses, furthermore apparatus for implementing thereof | |
JPS5310039A (en) | Leak breaker operation indicating device with protective lamp | |
JPS524036A (en) | Starting circuit of the stabilized converter | |
JPS5466271A (en) | Electric insect killer | |
JPS5436496A (en) | Electric source device for fusion unit | |
JPS52155041A (en) | Ac power relay circuit | |
JPS5317923A (en) | Electric current source opening device of direct current chopper | |
GB2048599A (en) | Control circuitry for gated diode switches | |
JPS54134347A (en) | Power circuit | |
ES470053A1 (en) | Protection system for arc welding machines (Machine-translation by Google Translate, not legally binding) | |
JPS5267745A (en) | Switching protective device | |
GB882004A (en) | Automatic breaking of arc in arc welding | |
GB1492369A (en) | Heated-tool welding device |