US4360849A — Power distribution system

Claim 1

Independent Claim 177 words

A power delivery system comprising a transformer module and a feeder module, said transformer module including a transformer tank, insulating oil in said tank and a transformer having primary and secondary windings immersed in said oil in said tank; means mounted on said tank for connecting said primary winding to a power source, said means including a primary bushing mounted on the sidewall of said tank, a circuit breaker mounted on the sidewall of said tank adjacent to said primary bushing, conductive means connecting said circuit breaker to said primary bushing, a lightning arrester mounted on the top of said tank in close proximity to said primary bushing and means connecting said lightning arrester to said circuit breaker on the power source side of said circuit breaker; and a number of secondary bushings mounted on said tank; said feeder module including a housing having a transition cubicle and a feeder cubicle, electrically conductive means connecting said secondary bushing to said transition cubicle, and electrically conductive insulated cable assembly means connecting said transition cubicle to said feeder cubicle.

Claim 2

Dependent Claim 177 words

A power delivery system comprising a transformer module and a feeder module, said transformer module including a transformer tank, insulating oil in said tank and a transformer having primary and secondary windings immersed in said oil in said tank; means mounted on said tank for connecting said primary winding to a power source, said means including a primary bushing mounted on the sidewall of said tank, a circuit breaker mounted on the sidewall of said tank adjacent to said primary bushing, conductive means connecting said circuit breaker to said primary bushing, a lightning arrester mounted on the top of said tank in close proximity to said primary bushing and means connecting said lightning arrester to said circuit breaker on the power source side of said circuit breaker; and a number of secondary bushings mounted on said tank; said feeder module including a housing having a transition cubicle and a feeder cubicle, electrically conductive means connecting said secondary bushing to said transition cubicle, and electrically conductive insulated cable assembly means connecting said transition cubicle to said feeder cubicle.

Claim 3

Dependent Claim 34 words

The system according to claim 1 wherein said primary bushing is mounted at an angle on the sidewall of said tank whereby said primary bushing is disposed in close proximity to said circuit breaker.

Claim 4

Dependent Claim 12 words

The system according to claim 2 wherein said angle is approximately 45°.

Claim 5

Dependent Claim 24 words

The system according to claim 1 wherein said cable assembly means includes an insulated shielded cable having a visible break terminator at each end.

Claim 6

Dependent Claim 143 words

The system according to claim 1 wherein said transition cubicle includes a panel dividing said cubicle into a cable compartment and a circuit breaker compartment, an input bushing mounted on said transition cubicle and projecting into said breaker compartment, said input bushing being connected to said electrically conductive means, a feed through bushing extending through said panel, an electrically conductive member connecting said input bushing to said feed through bushing, said feeder cubicle including a front panel, a back panel and a top panel, said panels defining a cable chamber, a feeder breaker chamber and a plenum chamber within said feeder cubicle, a bushing junction mounted on said front panel, said bushing junction including at least two bushings, said insulated cable assembly means including a visible break terminator at each end for connecting said feed through bushing to one of said junction bushings.

Claim 7

Dependent Claim 62 words

The system according to claim 5 wherein said feeder cubicle includes a circuit breaker in said feeder breaker chamber and a pair of circuit breaker bushings mounted in said front panel; said circuit breaker bushings being operatively connected to said circuit breaker, and a second insulated cable assembly means connecting one of said junction bushings to one of said circuit breaker bushings.

Claim 8

Dependent Claim 58 words

The system according to claim 6 wherein said circuit breaker bushings are twist lock type bushings said second cable assembly means includes a shielded cable having a twist lock type terminator for connecting said second assembly to said breaker bushing and a visible break terminator at the other end for connecting said second assembly to said junction bushing.

Claim 9

Dependent Claim 28 words

The system according to claim 5 including one way valve means in said top panel of said feeder cubicle for connecting said breaker compartment to said plenum chamber.

Claim 10

Dependent Claim 15 words

The system according to claim 8 including means for venting said plenum chamber to atmosphere.

Claim 11

Dependent Claim 38 words

The system according to claim 1, 2, 4, 5, or 8 wherein said feeder module and transformer module are preassembled for delivery as complete units whereby said modules can be fully tested after assembly and prior to delivery.

Claim 12

Dependent Claim 182 words

A transformer module for a distribution substation, said transformer module comprising a tank having sidewalls, end walls, a top wall and a floor, insulating oil in said tank, a transformer having primary and secondary windings immersed in the oil in said tank, a radiator connected to said tank and means for circulating oil from said tank through said radiator, a primary bushing mounted on an angle on one of the sidewalls of said tank, a secondary bushing mounted on the top of said tank, means for connecting the primary bushing to said primary winding, a primary circuit breaker, means mounting said primary circuit breaker on the same sidewall of said tank as said primary bushing, a lightning arrester mounted on the top wall of said tank in close proximity to said primary bushing, means connecting the primary bushing, circuit breaker and lightning arrester to a high voltage power source, said lightning arrester being connected to said circuit breaker on the power source side, whereby said lightning arrester protects both the circuit breaker and transformer from fault conditions on the power source side.

Claim 13

Dependent Claim 182 words

A transformer module for a distribution substation, said transformer module comprising a tank having sidewalls, end walls, a top wall and a floor, insulating oil in said tank, a transformer having primary and secondary windings immersed in the oil in said tank, a radiator connected to said tank and means for circulating oil from said tank through said radiator, a primary bushing mounted on an angle on one of the sidewalls of said tank, a secondary bushing mounted on the top of said tank, means for connecting the primary bushing to said primary winding, a primary circuit breaker, means mounting said primary circuit breaker on the same sidewall of said tank as said primary bushing, a lightning arrester mounted on the top wall of said tank in close proximity to said primary bushing, means connecting the primary bushing, circuit breaker and lightning arrester to a high voltage power source, said lightning arrester being connected to said circuit breaker on the power source side, whereby said lightning arrester protects both the circuit breaker and transformer from fault conditions on the power source side.

Claim 14

Dependent Claim 76 words

The combination with a transformer module according to claim 11 of a feeder module including a transition cubicle and a feeder cubicle, said transition cubicle including means connecting said feeder module to said transformer module, said feeder cubicle including a low voltage circuit breaker, and insulated cable assembly means connecting said transition cubicle to said feeder cubicle, said cable assembly means including, a shielded cable and a visible break terminator at each end of said cable.

Claim 15

Dependent Claim 15 words

The combination according to claim 12 wherein said feeder module includes a second feeder cubicle.

Claim 16

Dependent Claim 19 words

The combination according to claim 13 wherein said second feeder cubicle is positioned next to said first feeder cubicle.

Claim 17

Dependent Claim 44 words

The combination according to claim 14 including a second insulating cable assembly means connecting said first feeder cubicle to said second feeder cubicle, said second insulating cable assembly means including a shelded cable and a visible break terminator at each end of the cable.

Claim 18

Dependent Claim 26 words

The combination according to claim 13 wherein said second feeder cubicle is positioned next to said transition cubicle on the side opposite the first feeder cubicle.

Claim 19

Dependent Claim 41 words

The combination according to claim 16 including second insulated cable assembly means connecting said transition cubicle to said second feeder cubicle, said second insulating cable assembly includes a shielded cable and a visible break terminator at each end of said cable.

Claim 20

Dependent Claim 64 words

The terminator according to claim 16 wherein said engaging means comprises an axially extending slot in the end of the probe and an annular slot at the end of the axially extending slot whereby said probe may be locked to the bore contact by aligning the pin with the axial slot and twisting the conductive member to seat the pin in the annular slot.

Claim 21

Dependent Claim 79 words

A feeder module for a distribution substation, said feeder module comprising a housing having a transition cubicle and a feeder cubicle, said transition cubicle including means for connecting the transition cubicle to a low voltage source, said feeder cubicle including a low voltage circuit breaker, and shielded insulated cable assembly means connecting said transition cubicle to said feeder cubicle, said cable assembly means including a shielded cable and a visible break terminator at each end of said shielded cable.

Claim 22

Dependent Claim 79 words

A feeder module for a distribution substation, said feeder module comprising a housing having a transition cubicle and a feeder cubicle, said transition cubicle including means for connecting the transition cubicle to a low voltage source, said feeder cubicle including a low voltage circuit breaker, and shielded insulated cable assembly means connecting said transition cubicle to said feeder cubicle, said cable assembly means including a shielded cable and a visible break terminator at each end of said shielded cable.

Claim 23

Dependent Claim 44 words

The feeder module according to claim 19 wherein said low voltage connecting means includes an input bushing, a feed through bushing, and bus means connecting the input bushing to said feed through bushing, said cable assembly means being connected to said feed through bushing.

Claim 24

Dependent Claim 116 words

The feeder module according to claim 19 or 20 wherein said feeder cubicle includes a pair of feed through bushings connected to said circuit breaker and a bushing junction having three taps, said cable assembly means connecting said transition cubicle to one of said bushing junction taps, and including a second cable assembly means connecting one other of said bushing junction taps to one of said low voltage circuit breaker bushings, said second cable assembly means including a shielded cable having a visible break terminator at one end of said cable, and a twist lock terminator at the other end of said cable, said twist lock terminator being connected to said low voltage circuit breaker bushing.

Claim 25

Dependent Claim 24 words

The feeder module according to claim 21 wherein said first cable assembly means provides a dead break live disconnect from said bushing junction tap.

Claim 26

Dependent Claim 147 words

A twist-lock terminator for connecting a high voltage cable to a high voltage bushing, said bushing having a bore contact with a radially inwardly extending pin located a spaced distance from the open end of the contact, and a spring biased assembly within said bore contact, said terminator comprising a housing formed from an insulating material, an electrically conductive connector connected to said cable and positioned within said housing, a conductive member positioned in said housing, said member being in electrical communication with said connector and having a probe adapted to be inserted into the bore contact in said bushing and engaging means on said probe for engaging the pin in said bore contact to lock the terminator to the bushing, said probe compressing said spring biased assembly until the slot is aligned with the pin whereby said probe can be rotated into engagement with said pin.

Claim 27

Dependent Claim 147 words

A twist-lock terminator for connecting a high voltage cable to a high voltage bushing, said bushing having a bore contact with a radially inwardly extending pin located a spaced distance from the open end of the contact, and a spring biased assembly within said bore contact, said terminator comprising a housing formed from an insulating material, an electrically conductive connector connected to said cable and positioned within said housing, a conductive member positioned in said housing, said member being in electrical communication with said connector and having a probe adapted to be inserted into the bore contact in said bushing and engaging means on said probe for engaging the pin in said bore contact to lock the terminator to the bushing, said probe compressing said spring biased assembly until the slot is aligned with the pin whereby said probe can be rotated into engagement with said pin.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1985-11-22	1986-05-24	1986-11-23	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1989-11-22	1990-05-24	1990-11-23	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1993-11-22	1994-05-24	1994-11-23	$7700.00	Window Closed / Lapsed

Power distribution system

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