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Patapsco Waste Water Treatment Plant Arc Flash Improvements

(Baltimore, MD)

Design, supply, programming and management of
medium voltage switchgear upgrades at Patapsco WWTP.
BDE LLC was involved in assisting Sidhu, the electrical
engineer, to design the remote breaker control cabinets.
BDE, LLC also complted the systems study of the entire
facility to find out the arc incident energy of the equipment.
We removed (12) existing Eaton DC relays and
replaced them with (12) Eaton FP-5000 Arc Mitigating
relays. In installing the relays, (12) Eaton VacClad
switchgear cells were modified to accept the new relay
and terminations were made to external remote
breaker control panels. 34kV ABB Type V pedestal
breakers were also modified to have arc mitigation
protection and a remote breaker control cabinet.
BDE, LLC also added remote racking to SqD
PZ3 style switchgear. We trained the facility
on the usage of this racking.

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