SUBSTATIONS AND MEDIUM VOLTAGE SWITCHGEAR

ArcSine Engineering has experience in the design of substations and medium-voltage systems. Our work includes electrical design, switchgear layout, short-circuit calculations, design of ground grids, protective device strategy and coordination, and services during construction including startup assistance. Following is a partial list of ArcSine projects.

DI WATER PUMPING SUBSTATION

Designed 15-MVA substation including two new 8-MVA transformers, 13.8-kV and 4.16-kV switchgear, and replacement of 12-pole isolation switch in 13.8-kV feeder loop. Design included load calculations, short-circuit studies, and grounding design.

40 X 80/80 X 120-FOOT WIND TUNNEL

Designed reactor type, reduced-voltage start system for the 7200KVA, 6,900-V A1 machine. The design included short-circuit analysis, reactor impedance calculations, switchgear specifications, and drawing details defining interception of the original motor leads to insert the new equipment.

50-MVA SUBSTATION, NASA-AMES RESEARCH CENTER

John Salas, Principal Engineer, performed relay coordination study and designed an addition to a 50-MVA, 115,000- to 13,800-volt substation.

N243 VMS MODERNIZATION PROJECT POWER DISTRIBUTION DESIGN

Designed power distribution system for the VMS Modernization Project including 13.8KV switchgear, two 1500KVA transformers and two motor control centers. Design included layout, short circuit calculations, protective device calculations and design of system grounding.

CRYSTAL SPRINGS PUMPING STATION

Designed 2,400-volt power distribution system for approximately 4,000 horsepower of water pumping, including the owner's motor controller, switchgear, and grounding transformer. Coordinated with new 5,000-kVA utility substation.

COLLINS PINE COGENERATION PROJECT

Designed a 10-MVA, 60,000- to 13,800-volt substation as part of a facility expansion. Designed 13.8-kV underground distribution, and performed short-circuit calculations and protective device coordination. Assisted with startup.