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| Insulation board for plaza deck construction |
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Power distribution system
| Details |
Inventors: Harris, David L.; Elwing, Daniel T.; Jones, Howard T.;
Assignee: RTE-ASEA Corporation (Waukesha, WI)
Primary Examiner: Eisenzopf; Reinhard J.
Assistant Examiner:
Attorney, Agent or Firm: Barry; Ronald E.
A distribution substation including a transformer module and a feeder module. The transformer module including a tank, a transformer having primary and secondary windings immersed in insulating oil within the tank, a radiator connected to the tank for cooling the oil in the tank, a primary bushing mounted on one of the side walls of the tank at an angle and being connected to the primary of the transformer, a secondary bushing mounted on the top of the tank connected to the secondary winding of the transformer, a primary circuit breaker mounted on the tank in close proximity to the primary bushing, a lightning arrester mounted on the top of the tank in close proximity to the primary bushing. The feeder module including a transition cubicle and a feeder cubicle. The transition cubicle including an input bushing and a feed-through bushing connected to the input bushing, the input bushing being connected to the secondary bushing of the transformer module and a secondary circuit breaker in the feeder cubicle, a bushing junction in the feeder cubicle connected to the feed-through bushing in the transition cubicle by an insulated cable assembly having visible break terminators at each end, a pair of bushings in the feeder cubicle connected to the low voltage circuit breaker and an insulated cable assembly connecting the bushing junction to one of the pair of bushings in the feeder cubicle. The cable assembly including a Visi-break terminator at one end and a twist-lock terminator at the other end. |
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DETAILED DESCRIPTION OF THE INVENTION The power delivery system generally includes a transformer module 12 and a feeder module 14.
The transformer module 12 includes a transformer 16, primary bushings 18, secondary bushings 20, primary lightning arresters 22 and primary circuit breakers 24 as well as a radiator bank 26 all mounted directly on a transformer tank or housing 28 having sidewalls 30, end walls 32, a top 34 and a floor or base 36.
These components are arranged on the housing 28 in a unique configuration which provides a low profile, increased safety, improved accessability and reliability as well as an increase in the overall efficiency of operation of the module.
The feeder module 14 includes the feeder breakers 38, secondary lightning arresters 40, fuses 42 and potential or voltage meter transformers 44 fuses.
These components are arranged in a feeder housing 46 which is formed by a transition compartment or cubicle 48 and a number of feeder compartments or cubicles 50.
Electrical connection means in the form of shielded elastomeric insulated cable assemblies 52 are provided within the feeder module to connect the transition cubicle 48 to the feeder cubicle 50.
The cable assemblies 52 eliminate the bare bus bars commonly used in switch gear providing a further improvement in safety for the linemen.
THE TRANSFORMER MODULE As seen in FIGS.
1 and 2, the transformer 16 is mounted within the housing 28 with the primary bushing 18 connected to the primary winding of the transformer by means of a primary conductive line 54 and the secondary windings of the transformer connected to the secondary bushings 20 by means of secondary conductive lines 56.
The transformer 16 is immersed in oil 58 provided in the tank or housing 28.
A three-phase, two- or three-winding transformer can be used in the system.
These transformers are of a multi-stepped core type to reduce no-load and load losses and are rated at maximum current available on the secondary for a given voltage.
Current ratings for the transformers range from 200 through 3000 amps at 100 amp increments
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