Electrical transmission or interconnection systems – Switching systems – Plural switches
Patent
1983-10-24
1985-12-31
Pellinen, A. D.
Electrical transmission or interconnection systems
Switching systems
Plural switches
307115, 307147, 361189, 361191, H01H 4700
Patent
active
045623597
ABSTRACT:
In a protective circuit layout for a high voltage switchgear installation the switching position of the high voltage switches is detected by position signal contacts (for example Q81NCR, Q81NCS, Q81NCT). The status signals emitted by the position signal contacts of a group of switches (Q81, Q82, Q83, Q0) serve in a logic combination to monitor the command path of a switch (Q91) not belonging to the group. Each of the switches (for example Q91) is provided with a modularizable release unit with an inlet part (FEQ91) and an outlet part (FAQ91) arranged in the command path. At the inlet part (FEQ91) the status signals required for the monitoring of the command path of the associated switch (Q91) are present. At the outlet part (for example FAQ91) the signal emitted by the associated switch (Q91) to the release units of other switches of the switchgear installation may be obtained. In the release unit the status signals effecting the blocking or release of the switch (Q91) to be monitored are processed.
REFERENCES:
patent: 3748540 (1973-07-01), Eggenberger et al.
patent: 4480193 (1984-10-01), Blahous et al.
patent: 4507703 (1985-03-01), Blau et al.
BBC Brown Boveri & Company Limited
Jennings Derek S.
Pellinen A. D.
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