Msc-3 Power Wiring For Single Phase Supply - Zener MSC-3 Instruction Manual

MSC-3 Power wiring for Single Phase Supply

MSC-3
L1 L2 L3
L1 L2
Single Phase Supply
SD08298A
Any model MSC-3 can be operated from a single phase AC supply. In addition to the electrical
installation information on pages 9 and 10, the following additional constraints apply to operation
on a single phase power supply:
• The single-phase supply voltage must be within the 3 phase supply voltage limits for the MSC-3
model to be used. For example, use an MSC-3Lxx model for a 240VAC single-phase supply or a
MSC-3Rxx model for a 480VAC single phase supply.
• A standard 3-phase motor of a voltage rating appropriate to the MSC-3 model should be used.
See the specifications section of this manual for
output voltages.
• Fuses or circuit breakers for the AC supply should be
according to the table on page 10.
• The MSC-3 is unsuitable for use with single-phase
motors.
• The DC Bus Choke option is mandatory for operation
from a single-phase supply.
• The continuous output current rating is reduced
from the values stated for 3-phase supply operation
according to the graph on the right.
• The maximum available output voltage will
decrease to 95% of the RMS input voltage. This is a
consequence operating from a single phase supply
and means that the available motor torque at full speed will be reduced to approximately 90% of
the motor rated torque. De-rating can be avoided if the single phase input voltage is at least 1.05
times the rated motor voltage.
E M1 M2 M3
MOTOR
IM00120 IM00120
MSC-3 Instruction Manual
i
The D09 1 Phase Input Supply
feature on page 80 must be
enabled for single phase supply
operation
CAUTION
Be sure to review the information
on the following pages concerning
electrical installation issues.
See Installation practices for
Electromagnetic compatibility
(EMC) compliance on page 13
and specific information for
the EMC compliant installation
of each chassis size on pages
14 - 18 BEFORE selecting
or installing motor cables and
glands.
The screened motor cable should
only contain the phase and earth
(PE) conductors of one inverter
and the associated motor. Do not
include other conductors inside
the screen.
Output Current Rating for
Single Phase AC Supply
100%
50%
0 %
0 % Speed 100%
11