SEW-Eurodrive EDR71, Быстрый старт, Страница: 7 / 16

1
Revision
Mechanical installation
Revision – EDR..71 – 315, EDRN80 – 315
7
Measuring the insulation resistance
The insulation resistance (see following figure) varies greatly depending on the tem-
perature.
If the measured resistance is within the range of the limit characteristic curve (depend-
ing on the ambient temperature), the insulation resistance is sufficient. If the value is
below the limit characteristic curve, dry the motor.
100
10
1
0,1
0 20 40 60 80
[ ˚C ]
[M ]
173323019
Drying the motor
Proceed as follows to dry the motor:
1. Heat up the motor, either using warm air or using an isolation transformer:
WARNING
Risk of crushing due to torque at the motor shaft.
Severe or fatal injuries.
• Only use warm air for drying DR.. motors with rotor designation "J".
• Do not use an isolation transformer for drying DR.. motors with rotor designation
"J".
With warm air
1. DR.. motors with rotor designation "J" may be dried with warm air only.
2. End the drying process when the minimum insulation resistance is exceeded.
With disconnection switch
1. Connect the windings in series.
2. Auxiliary AC voltage supply max. 10% of the nominal voltage with max. 20% of the
rated current
22127909/EN – 07/2018