Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1996-01-11
1997-06-10
Mullen, Thomas
Communications: electrical
Condition responsive indicating system
Specific condition
340657, 340660, 340664, 361 93, 361 94, G08B 2100
Patent
active
056380518
ABSTRACT:
A method for monitoring an electrical drive, in particular a drive of an armature, having electric supply lines being extended through a switchgear plug-in unit associated with the drive and being connected at the plug-in unit to a measurement and evaluation unit, includes connecting at least one of the supply lines to the measurement and evaluation unit through a current transformer, and simultaneously operating and monitoring the drive with the plug-in unit. An apparatus for monitoring the electrical drive includes a switchgear plug-in unit associated with the drive. Electric supply lines of the drive extend through the plug-in unit. Voltage pickups and current pickups are disposed at the plug-in unit for a measurement and evaluation unit. Voltage measuring lines in the plug-in unit begin at the supply lines and end at the voltage pickups. Current transformers in the plug-in unit are associated with the supply lines without interrupting the supply lines. Current measuring lines connect the current transformers to the current pickups.
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Greenberg Laurence A.
Lefkowitz Edward
Lerner Herbert L.
Mullen Thomas
Siemens Aktiengesellschaft
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