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Overtemperature ∆ϑ
31
Limit temperatures of coil insulating
materials
Rated voltage U
N
Rated current I
B
Rated power P
N
Rated power at 20°C winding temperature P
difference between the temperature of the electromagnetic device or a
part thereof and the ambient temperature
in accordance with DIN VDE 0580. The individual insulating materials
are classified by insulation classes to DIN IEC 60085.
supply voltage specified by the manufacturer for voltage windings to
identify the device or component
amperage determined by the manufacturer for the specified operating
conditions. Unless otherwise specified, the rated current refers to the
rated voltage, 20°C winding temperature and to the rated frequency for
a given operating mode of voltage windings.
power value to identify the device or component
determined from the rated current of voltage-controlled devices and
B
components and the R
20
Operating Instructions BA 77 600..A00 // Last updated: 13/03/2020 // Page 28 of 33
resistance at 20°C winding temperature
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