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69x34.5KV Portable Substation Details 

·        Standard Tri-axle lowboy tractor trailer with grounding pads

·        69KV Primary Gang Operated Airbreak Switch with ground mat

·        69KV 80E SMD-2B Fuse Units with integral lightning arrestors.

·        6700KVA Power Transformer

o       69,000 x 34,500 V Primary – 7200Wye secondary  Taps + 2 ½%

o       External Fan Controls

o       Neutral Grounding Resistor 15A (277 Ohms) w/ PT backup GR protection

o       Main three phase metering with Multilin PQM Power Quality Meter

·        3-Circuit Vacuum switchgear complete with the following typical each circuit

o       Toshiba 630A electrically operated vacuum circuit breakers

o       350MCM Kerite feed

o       Visible Air break switch

o       Ammeter

o       ABB Circuit shield 51Y overcurrent relays

o       ABB Circuit shield 50D ground relay

o       Multi-tap Current Transformers

o       50:5 Ground fault Current Transformer

o       Pemco GM3 Ground monitor relay

o       Outgoing cable exits through trailer floor with cable bushings.

o       9KV lightning arrestors

o       Steel steps and guards

·        Miscellaneous convenience lighting and 120V receptacles


Telephone: 270/825-1437 Fax: 270/825-1485

3135 Grapevine Rd.

Madisonville, KY 42431