MY130576A - Earth fault circuit breaker - Google Patents
Earth fault circuit breakerInfo
- Publication number
- MY130576A MY130576A MYPI9501180A MY130576A MY 130576 A MY130576 A MY 130576A MY PI9501180 A MYPI9501180 A MY PI9501180A MY 130576 A MY130576 A MY 130576A
- Authority
- MY
- Malaysia
- Prior art keywords
- load
- voltage
- circuit breaker
- transformers
- current
- Prior art date
Links
Landscapes
- Protection Of Transformers (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
AN EARTH FAULT CIRCUIT BREAKER (10) FOR USE IN A CIRCUIT INCLUDING AN AC POWER SUPPLY AND A LOAD (11), WHICH CIRCUIT BREAKER COMPRISES A CURRENT-TO-VOLTAGE CONVERTER (12) HAVING TWO TRANSFORMERS FOR MONITORING THE CURRENT BEFORE AND AFTER FLOWING THROUGH THE LOAD, A LEAKAGE CURRENT/VOLTAGE DETECTOR (13A) FOR PROCESSING THE OUTPUTS (E1 & E2) OF THE TRANSFORMERS TO PRODUCE A RESULTANT VOLTAGE, A VOLTAGE COMPARATOR (16) FOR COMPARING THE SAID RESULTANT VOLTAGE WITH A PREDETERMINED REFERENCE VOLTAGE TO DETERMINE IF THERE IS A DIFFERENCE BETWEEN THE TWO TRANSFORMER OUTPUTS, WHICH IS CAUSED BY AN EARTH FAULT APPEARING AT THE LOAD, AND A SWITCHING DRIVER (14) FOR DISCONNECTING THE LOAD FROM THE POWER SUPPLY IN RESPONSE TO SUCH A DIFFERENCE BETWEEN THE TWO TRANSFORMER OUTPUTS EXCEEDING THE PREDETERMINED REFERENCE VOLTAGE, WHEREIN EACH TRANSFORMER HAS FIRST AND SECOND PRIMARY WINDINGS (P1 & P2) ARRANGED TO BE CONNECTED TO OPPOSITE SIDES OF THE LOAD AND THE TWO TRANSFORMERS ARE ARRANGED TO PROVIDE OUTPUTS AT THEIR RESPECTIVE SECONDARY WINDINGS (S),CORRESPONDING TO THE NORMAL LOAD CURRENT (I2), IN A SUBSTANTIALLY ANTI-PHASE RELATIONSHIP.THE CIRCUIT BREAKER (10) MAY OPTIONALLY INCLUDE ANOTHER VOLTAGE COMPARATOR (21) TO DETECT OVERLOAD CURRENT BY MONITORING THE OUTPUT OF EITHER ONE OF THE TRANSFORMERS.(FIG 1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MYPI9501180 MY130576A (en) | 1995-05-04 | 1995-05-04 | Earth fault circuit breaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MYPI9501180 MY130576A (en) | 1995-05-04 | 1995-05-04 | Earth fault circuit breaker |
Publications (1)
Publication Number | Publication Date |
---|---|
MY130576A true MY130576A (en) | 2007-06-29 |
Family
ID=47289957
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MYPI9501180 MY130576A (en) | 1995-05-04 | 1995-05-04 | Earth fault circuit breaker |
Country Status (1)
Country | Link |
---|---|
MY (1) | MY130576A (en) |
-
1995
- 1995-05-04 MY MYPI9501180 patent/MY130576A/en unknown
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