60 Guidelines for planning the electrical installation
Additional requirements for explosion-safe (EX) motors
If you use an explosion-safe (EX) motor, obey the rules in the requirements table above. In
addition, consult the motor manufacturer for any further requirements.
Additional requirements for ABB motors of types other than M2_, M3_, M4_, HX_
and AM_
Use the selection criteria given for non-ABB motors.
Additional requirements for the braking applications
When the motor brakes the machinery, the intermediate circuit DC voltage of the drive
increases, the effect being similar to increasing the motor supply voltage by up to
20 percent. Consider this voltage increase when you specify the motor insulation
requirements if the motor is braking a large part of its operation time.
Example:
Motor insulation requirement for a 400 V AC line voltage application must be
selected as if the drive were supplied with 480 V.
Additional requirements for ABB high-output and IP23 motors
The rated output power of high output motors is higher than what is stated for the particular
frame size in EN 50347:2001. This table shows the requirements for ABB random-wound
motor series (for example, M3AA, M3AP and M3BP).
Nominal AC supply
voltage
Requirement for
Motor insulation
system
ABB du/dt and common mode filters, insulated N-end
motor bearings
100 kW <
P
N
< 200 kW P
N
> 200 kW
140 hp <
P
N
< 268 hp P
N
> 268 hp
U
N
< 500 V Standard + N + N + CMF
1)
500 V < U
N
< 600 V Standard + du/dt + N + du/dt + N + CMF
or
Reinforced + N + N + CMF
1)
600 V < U
N
< 690 V Reinforced + du/dt + N + du/dt + N + CMF
1)
also du/dt filter is required at the output of the basic drive modules if the motor cable length is less
than 20 meters before connecting the motor cables together
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