ABB ACS 600 Hardware Manual page 12

Safety Instructions
Motor Type
ABB Motors
(manufactured
from beginning of
1998)
Random-wound
Motors
Form-wound
Motors
viii
The voltage of the pulses can be almost double at the motor terminals,
depending on the length of cable between the drive and the motor. This
in turn can cause additional stress to the motor insulation. The motor
manufacturer should be consulted regarding the characteristics of the
motor insulation system. Failure of the motor to fulfill the following
requirements may shorten its life.
The following table lists the insulation requirements for motors used
with ACx 600 AC drives.
Nominal
AC Line Voltage
< 500 V
V Standard insulation system
N
525 V < V ≤690 V
Standard insulation and dv/dt filter
N
or
special insulation system
≤420 V
V Motor insulation system must withstand V
N
420 V < V ≤500 V
If motor insulation system withstands V
N
µs rise time, a dv/dt filter is not needed.
With a dv/dt filter at the output of the ACx 600, motor
insulation system must withstand V
500 V < V ≤600 V
Motor insulation system must withstand V
N
dv/dt filter must be used at the output of the ACx 600.
600 V < V ≤690 V
Motor insulation system must withstand
N
V
PK
ACx 600.
≤690 V
V If motor insulation system withstands V
N
time 0.3 µs, no dv/dt filter is needed.
Symbol
V
N
V
PK
:
Rise time
= 0.8 · /(dv/dt)
t V
PK
Motor Insulation Requirement
= 1800 V. A dv/dt filter must be used at the output of the
Definition
nominal power line voltage
peak line to line voltage at motor terminals
Rise time is line to line voltage change rate
at motor terminals (the interval during
which the voltage changes from 10% to
90% of the whole voltage range)
V and
PK
the values of V
diagrams below.
= 1300 V.
PK
= 1600 V and 0.2
PK
= 1300 V.
PK
= 1600 V. A
PK
= 2000 V and rise
PK
t depend on cable length. Read
and dv/dt from the
PK
601/604/607 US Supplement