Rockwell Automation Publication 1560F-UM001A-EN-P - June 2019 77
Commissioning Procedure Chapter 3
Power Supply Tests
1. Isolate incoming power.
2. Open the door(s) providing access to the SCR/heatsink assemblies. You
will be touching components which are connected to the high voltage
power circuit, so be sure to isolate power as stated above.
3. Apply rated control voltage to the control circuits from a separate control
source, or by plugging into the test source connector, and selecting the
TEST position of the control switch.
4. Check voltage on each gate driver board by connecting a DC voltmeter at
TP4(+) and TP3(-). (See Figure 38
.) The voltage should be 18…22V DC.
5. Locate the SMC-50 Interface board in the control section (see Figure 37
).
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. This starts a pulse generator to supply simulated
gate-pulse signals via fiber optic cables to the gate driver boards. A red
LED beside the switch, and the six yellow LEDs on the left side of the
Interface board should be lit in the following sequence: DS11 (A+) ->
DS12 (A-) ->DS5 (B+) -> DS6(B-) -> DS7 (C+) -> DS8(C-), and repeat
after 2 seconds. With the correct fiber optic connection to interface board,
the LEDs on Gate Driver Board should be lit in the same sequence. (Note:
They may appear dim, depending on ambient light conditions).
6. With the gate pulses on, check the voltage again on each gate driver board
as described in Step 4 above. The voltage should be 4…5V DC.
7. 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 38
).
ATTENTION: Servicing energized industrial control equipment can be
hazardous. Severe injury or death can result from electrical shock, burn, or
unintended actuation of controlled equipment. Before proceeding, ensure that
all sources of power are isolated and locked out. Verify that all circuits are
voltage free using a hot stick or appropriate voltage measuring device. Any
covers or barriers removed during this procedure must be replaced and securely
fastened before energizing equipment. Where appropriate, the case of test
equipment should be connected to ground.
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