Explosion resistant overload and relay mounting for explosion re

Details Explosion resistant overload and relay mounting for explosion re Explosion resistant overload and relay mounting for explosion re

1978-03-17

1980-05-27

Budd, Mark O.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 71, 310 88, H02K 1100

Patent

active

042052467

ABSTRACT:
An explosion resistant motor has a metal casing with a cluster of electrical terminals extending from a wall thereof and sealed thereto. A section of metal pipe has one end welded to the casing wall and surrounds the terminal cluster. A metal clip mounts an inherent thermal overload device in the open end of the pipe. A positive temperature coefficient resistance starting relay in the pipe is coupled between one motor terminal and one overload terminal. Electrical leads are connected to another motor terminal and another overload terminal and extend out of the pipe through a conduit welded to the wall thereof. A pipe cap is threaded on the open end of the pipe to complete an explosion resistant enclosure for the overload and starting relay, and also to secure the overload in place.

REFERENCES:
patent: 2318076 (1943-05-01), Johns
patent: 2368492 (1945-01-01), Ralston
patent: 2523059 (1950-09-01), Richert et al.
patent: 2590559 (1952-03-01), Miller

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