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4Start Up
1. Input power to the unit must be OFF and locked
out per OSHA requirements. Do not rely on panel
disconnect switches.
WARNING
HAZARDOUS VOLTAGE!
if input and output connections have been connected
improperly, there is potential for high voltage on these
terminals. If power leads for multiple motors are
improperly run in same conduit, there is potential for
leakage current to charge capacitors within the panel, even
when disconnected from line input. For initial start up,
make no assumptions about power components. Follow
pre-start procedures described below. Failure to do so
could result in death, serious 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 the 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. CheckTable 3.9 and Table 3.10 for proper ground
wire: panel to main building distribution ground,
and panel to motor ground.
7. Confirm control connections terminated per
connection diagrams supplied with the
equipment.
8. Check for external devices between drive panel
output and motor. It is recommended that no
devices be installed between the 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, the motor must be
wired on run winding, not start winding.
12. Confirm motor FLA is equal to or less than
maximum panel output current. Some motors
have higher than normal NEMA currents.
13. Check that the overload relay is set for FLA of
connected motor. Service factor is built into
overload relay. Relay trips at 120% of setting.
14. For drive start up procedures, see drive
instruction manual.
Start Up
BAS-SVX49A-EN 4-1