Rockwell Automation SA3100 Diag,Troublesht,Startup,Guide - Manual (Page 41)

Installation and Start-Up Guidelines 4-9
4.7.7 Testing DC Bus Supplies and DC Input Power Modules
DC bus power may be supplied to DC input Power Modules by a diode rectifier, a
phase controlled rectifier, a synchronous rectifier, or a more complex combination of
rectifiers that supply unregulated or regulated DC power to the Power Module’s DC
bus. In addition, the DC bus supply may also include snubber dissipation or
regenerative capability.
4.7.7.1 Checking the DC Bus Supply
Prior to applying power to any Power Module, operation of the DC bus supply should
be checked for proper connections, proper operation, correct voltage levels, and
correct polarity at termination points. Refer to the appropriate installation and setup
instructions for your system’s specific equipment.
Step 1. Check DC bus voltage and polarity prior to applying power to the Power
Module. The DC bus voltage should be approximately equal to 1.43 times the
maximum output voltage required from the Power Module.
4.7.7.2 Testing DC Input Power Modules with DC Power On
The following steps are required to test DC input Power Modules before they can be
put into service.
Step 1. Check DC power levels.
a. Verify that DC input power to the Power Module is off.
b. Connect a DC voltmeter to the DC+ and DC– terminals on terminal block
TB1. See Appendix I for terminal identification.
c. Apply power to the drive and verify the DC voltage level and polarity.
Step 2. If the motor uses 3-phase AC to power its blower motor, verify proper blower
motor rotation. Check to see that air is being forced into the motor. If air flow
is reversed (air is being pulled out of the motor), remove AC input power from
the blower motor and interchange any two AC line power wires feeding the
blower motor. Note that the blower motor must be wired to a fixed AC power
source and not to the drive.
!
ATTENTION:Only qualified personnel familiar with the construction and
operation of this equipment and the hazards involved should install,
adjust, operate, or service this equipment. Read and understand this
manual and other applicable manuals in their entirety before proceeding.
Failure to observe this precaution could result in severe bodily injury or
loss of life.
ATTENTION:These procedures are performed with power on. Exercise
extreme caution as hazardous voltage exists. Failure to observe this
precaution could result in severe bodily injury or loss of life.
ATTENTION:Before proceeding, make sure that you can quickly stop
the drive if necessary. If the input power disconnect and/or stop
push-button are out of your reach, have an associate stationed to operate
them in the event of drive malfunction during these initial power checks
and drive adjustment. Failure to observe this precaution could result in
damage to equipment and bodily injury.