Power loss
QUESTION:
How to calculate power loss of contactors which is generally required for thermal calculations of a switchboard.
ANSWER:
The power losses of contactors can be calculated as follows:
- with DC-operated contactors: Closed power consumption of magnet coil- with AC-operated contactors: Closed power consumption of magnet coil x cos phi
Note: The above coil power consumptions and power losses per current path
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Multimotor Applications
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Many applications require more than one motor. In some instances, one drive
can supply two or more motors. When this happens, the current rating of the
mot...
15 years ago
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