ABB ACS 600 Hardware Manual page 8

Safety Instructions
Motor Connections
Motor Insulation
Requirement
Motor Type
ABB Motors
(manufactured from
beginning of 1998)
Shq‚€‚ˆqÃH‚‡‚…†
A‚…€‚ˆqÃH‚‡‚…†
vi ACx = ACS/ACC/ACP
WARNING! Operation is not allowed if the motor nominal voltage is
less than one half of (ACP: 0.4 times) the ACx 600 nominal input
voltage, or the motor nominal current is less than 1/6 of the ACx 600
nominal output current.
As with all frequency converters employing the most modern IGBT
inverter technology, the ACx 600 output comprises – regardless of
output frequency – pulses of approximately 1.35 times the mains
network voltage with a very short rise time.
The voltage of the pulses can be almost double at the motor terminals,
depending on the motor cable properties. This in turn can cause
additional stress to the motor insulation. The motor manufacturer
should be consulted regarding the construction of the motor insulation.
Failure of the motor to fulfil the following requirements may shorten its
life.
The requirement of motor insulation level in ACx 600 frequency
converter drive is given below.
Nominal Mains Voltage
< 500 V
U
N
525 V < U ≤ 690 V
N
≤ 420 V
U
N
420 V < U ≤ 500 V
N
500 V < U ≤ 600 V
N
600 V < U ≤ 690 V
N
≤ 690 V
U
N
Motor Insulation Requirement
T‡hqh…qÃv †ˆyh‡v‚Ã†’ †‡r€
T‡hqh…qÃv †ˆyh‡v‚ÃhqÃqˆq‡Ãsvy‡r…
‚…
†ƒrpvhyÃv †ˆyh‡v‚Ã†’†‡r€
H‚‡‚…Ãv†ˆy h‡v‚Ã†’ †‡r€Ã€ˆ†‡Ãv‡u†‡hqÃ
= 1300 V.
Ó
LL
D sÀ‚‡‚…Ãv†ˆyh‡v‚Ã†’ †‡r€Ãv‡u†‡hq†Ã
= 1600 V
Ó ÃhqÃ!Ã
LL
du/dt filter
Ãv†Ã‚‡ÃrrqrqÃ
With a du/dt filter at the output of the
ACx 600,
€‚‡‚…Ãv†ˆyh‡v ‚Ã†’ †‡r€Ã
= 1300 V.
v ‡u†‡hqÃÓ
LL
H‚‡‚…Ãv†ˆy h‡v‚Ã†’ †‡r€Ã€ˆ†‡Ãv‡u†‡hqÃ
//
Ó Ã2à %ÃWÃ6Ãqˆq‡Ãsv y‡r…Àˆ†‡ÃirÃ
ˆ†rqÃh‡Ã‡urˆ‡ƒˆ‡Ã‚sÇurÃ68‘Ã%
H‚‡‚…Ãv†ˆy h‡v‚Ã†’ †‡r€Ã€ˆ†‡Ãv‡u†‡hqÃ
= 1800 V. A du/dt filter must be
Ó
LL
used
h‡Ã‡urˆ‡ƒˆ‡Ã‚sÇurÃ68‘Ã%
D sÀ‚‡‚…Ãv†ˆyh‡v‚Ã†’ †‡r€Ãv‡u†‡hq†Ã
//
Ó
2Ã!ÃWÃhqÃ…v†rÇv€r "Ã
qˆq‡Ãsvy ‡r…Ãv†Ãrrqrq
ACS/ACC/ACP 604/607 Frequency Converters
µ
†Ã…v†rÇv€rÃhÃ
must
Ã
.
µ
†Á‚Ã