PowerTec Regenerative Brushless DC Motor Control 1000AR - Manual (Page 14)

Model 1000AR Installation and Operation Manual P AGE
13
OFFICIAL 6/4/2001
HO W DO I …
CONNECT AC POWER TO THE 1000AR DRIVE?
Standard Model 1000AR Brushless DC drives will not operate on
single phase AC power.
Model 1000AR drives require a three-phase main power source with
a KVA rating at least equal to the HorsePower rating of the drive. Power
is NOT returned to the power line during regeneration.
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 1000AR drives do not include a disconnecting switch for input
power. The user must supply a switch that meets the 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 need to change the voltage level.
In those cases, you will need a transformer 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 1000AR 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: AC LINE CURRENT OF THE BLDC DRIVE IS NOT
REPRESENTATIVE OF MOTOR LOAD CURRENT!
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
.
R+ R-