Rockwell Automation SA3000 High Power Modules - Manual (Page 52)

4-20 High Power SA3000 AC Power Modules
Step 13. Install the new capacitor bank assembly by performing steps 1 through 12 in
reverse order.
Step 14. Close the cabinet doors and reapply power to the SA3000 Power Module.
4.5 Replacing the Power Module Cabinet
Use the following procedure to replace the SA3000 Power Module cabinet:
Step 1. Turn off and lock out the AC input power to the DC bus supply control
cabinet.
Step 2. Wait ten minutes to allow the DC bus voltage to dissipate.
Step 3. Open the cabinet doors and check the voltage across the DC bus bars,
347 A,B,C (+ bus) and 345 A,B,C (- bus), with an external voltmeter to ensure
the DC bus capacitors are discharged before touching any internal
components. See figure 4.1.
Step 4. Disconnect the DC bus leads from terminals 45 (-) and 47 (+). Disconnect the
GND wire from the ground terminal. See figure 3.4.
Note that if an overhead DC bus assembly was supplied, disassembly of the
overhead assembly is required. The assembly may be remounted on the
replacement cabinet, if required.
Step 5. Disconnect the AC input line (two-wire 115 VAC with ground) from the L1 (L),
L2 (N), and GND terminals on the control power board. See figure 3.4.
Step 6. Disconnect the AC output leads (U, V, W) from the motor and the motor
ground wire(s) from the GND terminal(s). See figure 3.4.
Step 7. Remove the SA3000 Power Module cabinet.
Step 8. Install the replacement SA3000 Power Module cabinet by performing these
steps in reverse order.
!
ATTENTION: DC bus capacitors retain hazardous voltages after input
power has been disconnected. After disconnecting input power, wait ten
(10) minutes for the DC bus capacitors to discharge. Open the cabinet
doors and check the voltage across the DC bus bars, 347 A,B,C (+ bus)
and 345 A,B,C (- bus), with an external voltmeter to ensure the DC bus
capacitors are discharged before touching any internal components.
Failure to observe this precaution could result in severe bodily injury or
loss of life.