Apparatus for safely disconnecting an electrical load from an electrical DC voltage supply
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United States of America Patent
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-
Apr 2, 2002
Issued Date -
N/A
app pub date -
Nov 29, 2000
filing date -
May 29, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for disconnecting an electrical load from an input DC voltage includes first and second lines which carry the input DC voltage to the electrical load. A fuse is connected in series in the first line. The switching contact of a first relay is connected in series in the first line and is opened for a disconnection process. The switching contact of a second relay is connected in parallel between the first and the second line downstream of the first relay and, when a disconnection process takes place, is closed once the first relay has been opened. The apparatus has a high availability despite the use of commercially available relays.
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