ABB ACQ810 - High-Output Motors and IP 23 Motors; HXR and AMA Motors; ABB Motors of Types Other than M2_, M3_, HX_ and am; Calculating the Rise Time and the Peak Line-To-Line Voltage

Planning the electrical installation 55
High-output motors and IP 23 motors
For motors with higher rated output than what is stated for the particular frame size in EN 50347 (2001) and for
IP23 motors, the requirements of ABB random-wound motor series (for example M3AA, M3AP, M3BP) are
given below. For non-ABB motor types, see the Requirements table above. Apply the requirements of range
100 kW < P
N
< 350 kW to motors with P
N
< 100 kW. Apply the requirements of range P
N
> 350 kW to motors
within the range 100 kW < P
N
< 350 kW. In other cases, consult the motor manufacturer.
HXR and AMA motors
All AMA machines (manufactured in Helsinki) for drive systems have form-wound windings. All HXR machines
manufactured in Helsinki starting 1.1.1998 have form-wound windings.
ABB motors of types other than M2_, M3_, HX_ and AM_
Use the selection criteria given for non-ABB motors.
Calculating the rise time and the peak line-to-line voltage
The peak line-to-line voltage at the motor terminals generated by the drive as well as the voltage rise time
depend on the cable length. The requirements for the motor insulation system given in the requirements table
are “worst case” requirements covering installations with 30 meter and longer cables. The rise time can be
calculated as follows: t = 0.8 · Û
LL
/(du/dt). Read Û
LL
and du/dt from the diagrams below. M ultiply the values
of the graph by the supply voltage
(U
N
) . In case of drives with resistor braking, the Û
LL
and du/dt values are
approximately 20% higher.
Motor
type
Nominal mains
voltage (AC line
voltage)
Requirement for
Motor
insulation
system
ABB du/dt filter, insulated N-end bearing and ABB common mode
filter
P
N
< 100 kW 100 kW < P
N
< 200 kW P
N
> 200 kW
P
N
< 140 hp 140 hp < P
N
< 268 hp P
N
> 268 hp
ABB motors
Random-
wound
U
N
< 500 V Standard - + N + N + CMF
500 V < U
N
< 600 V Standard + du/dt + du/dt + N + du/dt + N + CMF
or
Reinforced - + N + N + CMF
600 V < U
N
< 690 V Reinforced + du/dt + du/dt + N + du/dt + N + CMF
Û
LL
/U
N
Without du/dt filter
Cable length (m)
du/dt
U
N
-------------(1/μs)
1.0
2.0
5.0
4.0
3.0
1.5
2.5
3.5
4.5
100 200 300
100 200 300
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Cable length (m)
With du/dt filter
du/dt
U
N
-------------(1/μs)
Û
LL
/U
N
5.5