Lightning arrester system for underground loop distribution circ

Details Lightning arrester system for underground loop distribution circ Lightning arrester system for underground loop distribution circ

1986-07-21

1987-10-13

Scott, J. R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Transformer protection

361117, 439429, H02H 704

Patent

active

047002581

ABSTRACT:
A lightening arrestor system (30) for a pad mounted distribution transformer (18') incorporated in an underground loop distribution circuit has a lighting arrester (32) secured to the transformer parking stand (P) and attached to the pad ground connection. The arrester has a well (38) into which a cable elbow (A) formerly mounted upon a primary terminal bushing (H1B) is inserted. The arrester includes a varistor assembly including metal oxide disks (58). An elbow arrester (24') is mounted upon the terminal bushing which formerly mounted the cable elbow. The arrester obviates the employment of a feed-through device (28).

REFERENCES:
patent: 3141923 (1964-07-01), Henschke et al.
patent: 3825866 (1974-07-01), Piccione
patent: 4005341 (1977-01-01), Uptegraff, Jr. et al.
patent: 4621298 (1986-11-01), McMillen

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