VAN NESS SUBSTATION – 138 KV DISCONNECT SWITCH, GROUND SWITCH, AND SURGE ARRESTER REPLACEMENT

Modernization of existing 138 kV disconnect equipment at an in- service urban Pepco substation
Replacement required a mix of motor-operated and manually operated equipment with associated surge protection
Integration of new equipment into existing physical layouts, grounding systems, and Protection & Control infrastructure
Verification of existing structures for reuse while meeting Pepco SDM and IEEE requirements
Coordination of civil, structural, electrical, and P&C engineering under phased submittal constraints

Provided complete multi-discipline engineering for disconnect switch and associated equipment replacement
Designed installation of a 138 kV Motor-Operated Disconnect (MOD) switch with associated control and wiring
Engineered replacement of 138 kV manual ground switches and 84 kV MCOV line arresters
Performed structural evaluations and PE-stamped calculations to confirm adequacy of existing steel structures
Developed demolition, fabrication, grounding, raceway, and equipment wiring drawings with BOMs
Produced P&C schematics, AC/DC elementary diagrams, and RTU/C30 status and control integration
Supported QA/QC reviews, constructability checks, and redline incorporation through IFC

Applied precise equipment scoping to avoid overstatement and ensure technical accuracy
Delivered coordinated engineering across all disciplines, reducing interface risk during construction
Enabled reliable MOD operation and monitoring through clean P&C and RTU integration
Minimized field rework through constructable, Pepco- compliant drawings and QA/QC oversight
Provided IFC and as-built documentation aligned with Pepco review and closeout standards

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