Rockwell Automation 7763 Medium Voltage OneGear SMC Flex Motor Controller (10-15 kV) - Manual (Page 55)

Rockwell Automation Publication 7760-UM001D-EN-P - October 2014 55
Commissioning Procedure Chapter 2
14. Locate the SMC Flex Interface board in the LV control. This circuit board
has the control module mounted on it. Locate the switch labeled SW2 at
the upper left corner of the board. Close the switch by sliding the toggle up
(see
Figure 29 ). This starts a pulse generator to supply simulated gate-pulse
signals via fibre optic cables to the gate driver boards. A red LED beside the
switch, and the three yellow LEDs on the left side of the interface board
should be lit. (Note: They may appear dim, depending on ambient light
conditions.)
Figure 30 - SCR Power Truck showing mechanical bolting, power and control connections
15. With the gate pulses on, check the voltage again on each gate-driver board
as described in step 13 above. The voltage should be 4…5V DC.
16. Locate the Portable Test Power Supply that was included with the
equipment, and verify that the rating corresponds to the available power
system (i.e., 110/120V AC or 220/240V AC). Plug the unit into the
power source, and plug the green connector into J1 on each of the gate
driver boards (see
Figure 28 )
17. The yellow LED on the upper right-hand side of the energized gate driver
circuit should be lit (it may appear dim, depending on ambient light
conditions). While the gate pulses are still on, check the voltage on each
gate driver board as described in
step 13 above. The voltage should be
10…12V DC. If the voltage is less than 5V, then you have a bad gate driver
board. Do not leave the Portable Test Power Supply connected to a bad
gate driver board. The power supply adapter will overheat if the gate driver
board is shorted.
18. A more detailed check is performed by verifying the actual gate pulses by
connecting an oscilloscope between TP1 and TP3(-)
Figure 28 . To check
gate pulses, the pulse generator must be enabled (i.e., SW2 toggled up) and
the Portable Test Power Supply should be connected to J1. The pulse
should appear as shown in
Figure 31 and Figure 32 .
Load Terminal
Power pole
Line Terminal
Flex braid