22
Section 4
Start Up
Pre-start Procedure
1. Input power to unit must be OFF and
locked out per OSHA requirements. Do not
rely on panel disconnect switches.
H
IGH
V
OLTAGE
!
I
F INPUT AND OUTPUT CONNECTIONS HAVE BEEN CONNECTED
IMPROPERLY
,
THERE IS POTENTIAL FOR HIGH VOLTAGE ON THESE
TERMINALS
. I
F POWER LEADS FOR MULTIPLE MOTORS ARE
IMPROPERLY RUN IN SAME CONDUIT
,
THERE IS POTENTIAL FOR
LEAKAGE CURRENT TO CHARGE CAPACITORS WITHIN OPTION PANEL
,
EVEN WHEN DISCONNECTED FROM LINE INPUT
. F
OR INITIAL START
UP
,
MAKE NO ASSUMPTIONS ABOUT POWER COMPONENTS
. F
OLLOW
PRE
-
START PROCEDURES DESCRIBED BELOW
. F
AILURE TO FOLLOW
PRE
-
START PROCEDURES DESCRIBED BELOW COULD RESULT IN
PERSONAL INJURY OR DAMAGE TO EQUIPMENT
.
2. Use AC voltmeter to verify there is no
voltage on input terminals L1, L2, and L3,
phase-to-phase and phase-to-ground, and
output terminals T1, T2, and T3, phase-to-
phase and phase-to-ground.
3. Use ohmmeter to confirm continuity of
motor by measuring T1-T2, T2-T3, and
T3-T1.
4. Use ohmmeter to confirm open on input by
measuring L1-L2, L2-L3, and L3-L1. Note
that if an isolation transformer is between the
power source and panel, continuity will be
present. In this case, visually confirm that
motor and power leads are not reversed.
5. Inspect the panel for loose connections on
terminals.
6. Check for proper ground: option panel to
main building distribution ground, and
option panel to motor ground. See label
inside panel cover for proper wire size.
WARNING
!
7. Confirm control connections terminated
per connection diagrams supplied with the
equipment.
8. Check for external devices between drive
option panel output and motor. It is
recommended that no devices be installed
between motor and drive.
9. Record motor nameplate data; hp, voltage,
full load amps (FLA), and RPM. It will be
needed to match motor and drive later on.
10. Confirm that incoming power voltage
matches drive label voltage and motor
nameplate voltage.
11. For multiple winding motors, motor must
be wired on run winding, not start winding.
CAUTION
E
QUIPMENT
D
AMAGE
!
I
F MOTOR
FLA (
FULL LOAD AMPERAGE
)
IS GREATER THAN UNIT
MAXIMUM AMPS
,
DRIVE AND OPTION PANEL MUST BE REPLACED
WITH ONE OF APPROPRIATE RATING
. D
O NOT ATTEMPT TO RUN
UNIT
. F
AILURE TO MATCH
FLA
TO UNIT MAXIMUM AMP RATING MAY
RESULT IN EQUIPMENT DAMAGE
.
12. Confirm motor FLA is equal to or less than
maximum option panel output current.
Some motors have higher then normal
NEMA currents.
13. Check that overload relay(s) is set for FLA
of connected motor. Service factor is built
into overload relay.
14. For drive start up procedures, see drive
instruction manual.
