Title:
BUS PROTECTIVE RELAY DEVICE
Document Type and Number:
Japanese Patent JP2001112165
Kind Code:
A
Abstract:
To properly provide a bus protective relay device which can perform zero-ampere control, even when the main contact and the sub contact of a breaker do not conform to each other, which is the control condition of a zero ampere control circuit.
When an opening command is outputted to the breaker connecting buses and moreover overcurrent relays provided severally in the bus connecting lines on both sides of the breaker are out of operation, AND circuits 5 and 6 materialize, and timers 7 and 8 output commands to turn the input currents to divided protective relays RY01 and RY02 to zero for protecting those buses to a zero-ampere control circuit 4.
Inventors:
KODAMA ICHIRO
SENBA TOSHIAKI
KONNO MASAHIRO
SENBA TOSHIAKI
KONNO MASAHIRO
Application Number:
JP28382199A
Publication Date:
April 20, 2001
Filing Date:
October 05, 1999
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
H02H3/28; H02H7/22; (IPC1-7): H02H7/22; H02H3/28
Attorney, Agent or Firm:
Kei Mitani (1 outside)
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