Model
1000
Installation and Operation Manual
Page
11
OFFICIAL 6/1/2001
H
OW
D
O
I …
CONNECT AC POWER TO THE 1000 DRIVE?
Standard Model 1000 series Brushless DC drives will not operate on
single phase AC power.
Model 1000 series drives require a three-phase main power source with a
KVA rating
at least equal to the
HorsePower rating
of the drive.
However, the branch service rating (in KVA) supplying the drive must not
be more than 10 times the HP rating of the drive. If it is, you may need special
disconnecting means with a higher AC short-circuit current interrupting
capacity.
Model 1000 series drives do not include a disconnect for input power. The
user must supply a switch that meets applicable code requirements.
The maximum Interrupting Capacity (AIC) of the fuses is 5,000 amperes.
You will need a switch with a rating greater than 5,000 amperes if the short
circuit current on the service is greater.
You do not necessarily need an ISOLATION TRANSFORMER for
operation of the drive. You may want to use one, or you might need to meet
local code requirements. You may need to change the voltage level.
If you use a transformer, you will need one with a KVA rating at least as
large as the HP rating of the drive. If you use a transformer, we recommend a
delta/wye winding configuration. We also recommend that the transformer
have taps to raise or lower voltage.
The user protection supplied before the wires determines the sizes of the
power wires to the drive input. The table on the opposite page lists the full load
AC line currents of Model 1000 series drives.
The order of connection of the input phases is not important.
We size the main fuses to protect the semiconductor elements of the unit.
THEY MAY OR MAY NOT MEET THE REQUIREMENTS OF NATIONAL,
STATE AND/OR LOCAL ELECTRICAL CODES. The responsibility for meeting
the branch service protection and other code requirements and safety codes
belongs to the user.
NOTICE: THE AC LINE CURRENT OF THE BRUSHLESS DC DRIVE IS NOT
REPRESENTATIVE OF THE OUTPUT LOAD CURRENT TO THE
MOTOR!
The AC input current is directly proportional to the POWER output of the
motor. The only time the AC line current reaches its full value is when the
motor is operating at full speed with full load.
DO NOT ATTEMPT TO MEASURE MOTOR LOAD BY
MEASURING AC INPUT LINE CURRENT TO THE BLDC MOTOR
CONTROL.
TRANSFORMER
.
SEE FUSE
INPUT
BOARD
DRAWING
ON PAGE 8
L1
L2
L3
GND
MAIN
POWER
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