JPS5660367A - Trip time automatic test circuit dependent upon eddy current - Google Patents
Trip time automatic test circuit dependent upon eddy currentInfo
- Publication number
- JPS5660367A JPS5660367A JP13527179A JP13527179A JPS5660367A JP S5660367 A JPS5660367 A JP S5660367A JP 13527179 A JP13527179 A JP 13527179A JP 13527179 A JP13527179 A JP 13527179A JP S5660367 A JPS5660367 A JP S5660367A
- Authority
- JP
- Japan
- Prior art keywords
- tested
- trip time
- contact
- time
- circuit
- 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 reduce noise and vibration and suppress power loss and make a circuit small-size, by providing the current transformer of a high current ratio correspondingly to a material to be tested and by detecting the trip time when the primary-side contact for short-circuit and the voltage detecting circuit are operated simultaneously.
CONSTITUTION: At a test time, the contact of material 16 to be tested is closed previously, and constant-current device 11 is adjusted to flow a prescribed excessive current to material 16 to be tested. If material 16 to be tested is normal, the contact of material 16 to be tested is opened and the secondary-side voltage of current transformer 13 is increased rapidly after a prescribed time. This voltage is detected by detecting circuit 15 connected to the primary side of current transformer 13, and parallel contact 14 is closed, and the primary side is short-circuited. Consequently, the time for operating of detecting circuit 15 becomes the trip time.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13527179A JPS5660367A (en) | 1979-10-22 | 1979-10-22 | Trip time automatic test circuit dependent upon eddy current |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13527179A JPS5660367A (en) | 1979-10-22 | 1979-10-22 | Trip time automatic test circuit dependent upon eddy current |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5660367A true JPS5660367A (en) | 1981-05-25 |
Family
ID=15147793
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13527179A Pending JPS5660367A (en) | 1979-10-22 | 1979-10-22 | Trip time automatic test circuit dependent upon eddy current |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5660367A (en) |
-
1979
- 1979-10-22 JP JP13527179A patent/JPS5660367A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB2017434A (en) | Earth leakage protection | |
JPS5660367A (en) | Trip time automatic test circuit dependent upon eddy current | |
GB2012127A (en) | Fault-current circuit breaker | |
JPS5612560A (en) | Circuit for detecting open and closed state of contact | |
JPS55116276A (en) | Insulation resistance measuring device for power transmission line | |
JPS547141A (en) | Earthing detector | |
JPS5347902A (en) | Over heat protection device of revolving electric machine | |
JPS51129643A (en) | Load-current/phase-lack detecting circuit for three-phase circuit | |
GB2001215A (en) | Fuse status sensor | |
JPS5563600A (en) | Car generator | |
JPS5454253A (en) | Ratio differential relay device | |
JPS52129475A (en) | Load current detecting circuit | |
JPS5661658A (en) | Highly safe automatic withstanding voltage testing circuit | |
JPS5720668A (en) | Electric current measuring circuit using auxiliary current transformer | |
JPS55166059A (en) | Device for closing, synthesizing and testing breaker or the like | |
JPS57106308A (en) | Output device for engine electric vehicle | |
JPS55140172A (en) | Composite equivalent testing device of breaker | |
JPS5637566A (en) | Test unit for power application of fuse | |
JPS5693056A (en) | Detecting device of earth current | |
JPS5612563A (en) | Circuit for testing digital ic | |
JPS5236861A (en) | Remote control circuit for electric cleaner and the like | |
JPS5423946A (en) | Temperature protective device for power transformer | |
JPS54103525A (en) | Electrical route insulation resistance supervising device | |
JPS5482016A (en) | Prevention system from self-excitation in induction motor at power reception interruption | |
JPS5498947A (en) | Grounding detection device for electric power system |