Local Breaker Back up Protection Sample Clauses

The Local Breaker Back up Protection clause establishes requirements for protective measures that activate if a local circuit breaker fails to operate during a fault or abnormal condition. In practice, this means that additional relays or backup systems are installed to detect faults and isolate affected sections of an electrical network if the primary breaker does not trip as intended. This clause ensures system reliability and safety by preventing prolonged faults, minimizing equipment damage, and reducing the risk of widespread outages due to a single point of failure.
Local Breaker Back up Protection. This shall be provided for each 400 kV circuit breakers and will be connected to de- energize the affected stuck breaker from both sides. 1. LBB and REF relays shall be provided separately from transformer differential relay. 2. LBB relay may also be provided as built-in protection function of distributed bus bar protection scheme; however, in such case separate LBB relay shall be provided for tie bays (in case of One and Half breaker scheme).
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Local Breaker Back up Protection. This shall be provided for each 765kV, 400kV and 220kV circuit breakers and will be connected to de-energize the affected stuck breaker from both sides. Notes: 1. LBB & REF relays shall be provided separately from transformer differential relay. 2. LBB relay may also be provided as built-in protection function of distributed bus bar protection scheme; however in such case separate LBB relay shall be provided for tie bays (in case of One and Half breaker scheme). 3. Over fluxing & overload protection can be provided as built-in feature of differential relay. 4. In 765kV & 400kV switchyard, if spare bay of half diameter is identified as future, Tie CB relay panel shall be provided with Auto-reclosure feature.
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Local Breaker Back up Protection. This shall be provided for each 400kVand 220kV circuit breakers and will be connected tode-energize the affected stuck breaker from both sides.
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Local Breaker Back up Protection. This shall be provided for each 400kV circuit breakers and will be connected to de- energize the affected stuck breaker from both sides. 1. LBB relay may also be provided as built-in protection function of distributed bus bar protection scheme; however in such case separate LBB relay shall be provided for tie bays (in case of One and Half breaker scheme). 2. Over fluxing & overload protection can be provided as built-in feature of differential relay. 3. In 400kV switchyard, if spare bay of half diameter is identified as future, Tie CB relay panel shall be with Auto-reclosure feature.
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Related to Local Breaker Back up Protection

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