Title:
OPERATION CHECKER FOR EARTH LEAKAGE BREAKER WITH OPEN-PHASE PROTECTIVE FUNCTION FOR SINGLE PHASE AND THREE-PHASE
Document Type and Number:
Japanese Patent JP2549981
Kind Code:
B2
Abstract:
PURPOSE: To provide an operation checker for open-phase protection ELB in which the open-phase protective function can be checked easily at site.
CONSTITUTION: Power supply terminals 3, 4 are connected through a power supply switch 6, a fuse 7, and a current limit resistor 8 with the fixed terminals 9a, 9b of a variable resistor 9 whereas a detection terminal 2 is connected through a detection switch 5 with the sliding terminal 9c of the variable resistor 9. The power supply terminals 3, 4 are also connected with the load side voltage line terminals 54, 56 of an ELB 50 and the detection terminal 2 is connected with the overvoltage detection lead wire 69 removed from the load side neutral. When the dial of the variable resistor 9 is turned from an intermediate position, the voltage between any one of terminals 54, 56 and the lead wire 69 increases and the ELB 50 is opened when a predetermined voltage is exceeded.
Inventors:
TAKEMOTO MINORU
OKUDAIRA TATSUO
MISE KENJI
OKUDAIRA TATSUO
MISE KENJI
Application Number:
JP25999193A
Publication Date:
October 30, 1996
Filing Date:
October 18, 1993
Export Citation:
Assignee:
KANSAI ELECTRIC POWER CO
International Classes:
H02H3/353; G01R31/327; G01R31/333; (IPC1-7): H02H3/353; G01R31/327; G01R31/333
Domestic Patent References:
| JP4133234A |
Attorney, Agent or Firm:
Fukami Hisaro (2 outside)