Non-contaminating transformer oil pump, static arrester, and con

Details Non-contaminating transformer oil pump, static arrester, and con Non-contaminating transformer oil pump, static arrester, and con

1982-07-19

1984-02-28

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

361 1, 308 1A, 340682, 310 68B, 116208, 200 614, H02H 708

Patent

active

044344481

ABSTRACT:
A transformer motor pump unit for circulating a fluid in a transformer characterized by a rotating pump shaft mounted in non-electrically conductive bearings, means for detecting shaft displacement due to bearing wear, and a static arrester grounding the pump shaft and all rotating parts for preventing static electricity buildup on the shaft and subsequent discharge from the shaft to the bearing area. Power circuit means for operating the pump includes the static arrester as a control circuit for tripping the pump out of operation should mechanical failure occur.

REFERENCES:
patent: 3108264 (1963-10-01), Heinoo
patent: 3508241 (1970-04-01), Potter
patent: 3897116 (1975-07-01), Carpenter
patent: 4057365 (1977-11-01), Colmer
patent: 4320431 (1982-03-01), Bell
patent: 4379291 (1983-04-01), Hubbard et al.

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