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General Engineering and Electrical ContractingOver 50 Years Combined ExperienceLet our expert staff show you what we can do! -
National High Voltage Services, Inc.High voltage electrical contractor located in Northern California -
National High Voltage Services, Inc.Performs their own Structural work, Bussing and Welding -
National High Voltage Services, Inc.Performs their own Civil Construction -
National High Voltage Services, Inc.Performs their own Underground Splicing and Testing
National High Voltage Services Inc. is a Northern California Electrical Contractor Serving clients in the Federal, State, Local and Private Utilities and Municipalities, Renewable energy sectors, General Industrial and Commercial market.
National High Voltage Services, Inc.
High voltage electrical contractor with capabilities in general engineering and electrical contracting.
Core Competencies
Recent Projects
Description of Work: Provided client with a complete package procurement and installation of 115kV- 12.47kV Substation, including but not limited to:
- Fabricated steel, welded busing, 115kV circuit breaker, two 115kV manually operated disconnect switches, one motor operated disconnect switch, CCVT, Metering Class CITs, relay/protection panels along with A/C-D/C power panels.
- Provided yard surfacing above and underground conduit, control cable installation and wiring.
- Worked with PG&E to perform pre-parallel testing to ensure provided protections would not affect grid reliability.
Description of Work: Replaced 2 individual outdated 4000Amp Open transition tiebreak Switchgear and Power Busway, with 2 new Arc Flash technology 4000Amp switchgears and new Busway, running to 4 existing transformers.
- Installed 1200 Amp temporary power system to keep plant operational during construction.
- Installed remote panels for each section of gear for maintenance operators, as well as PLC control wiring for Operations control.
- Provided Design of Interconnect and PLC wiring and respective cabling and connections, more than control terminations.
- Testing and Start-up. Unique features of the project.
- Cut 108” Tall by 96” wide concrete panels into the wall to gain access into the building and perform work.
- Replaced concrete panel openings with commercial doors for future access.
Description of Work: 12kV Electric Underground Cable Replacement Project 2016 installation of Single-Phase Dead Front & Duplex Pad Mount Transformers.
- Installed Box Pads for Pad Mounted Transformers.
- Located existing wet and dry utilities to avoid conflicts.
- Installation of primary, secondary cables, splices, terminations and connectors included trench, excavation, compaction, paving, and directional drilling.
- Removed existing equipment, cable and ancillary material.
- Replaced 12kV overhead pole lines and risers.
