Earthed circuit for an electric railway car

Details Earthed circuit for an electric railway car Earthed circuit for an electric railway car

1986-10-06

1988-12-20

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural load circuit systems

Common conductor or return type

307 10R, 307 9, 361212, 361217, 105 49, H02J 734

Patent

active

047927038

ABSTRACT:
An earthed circuit for an electric railway car which is equipped with an electric circuit including an electrical apparatus for which a switching operation is performed by use of a power semiconductor device includes a first brush attached to one of the axles of the car for connecting a return circuit for the electric circuit to the ground and a second brush attached to the same axle to which the first brush is attached for connecting the car body and a box for holding the electrical apparatus to the ground. The noise current caused by the switching operation of the power semiconductor device can be effectively prevented from flowing into the rails on which the car is running.

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