Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C-Frame) - ForGe Control - Manual (Page 294)

294 Rockwell Automation Publication 7000L-UM301D-EN-P - June 2014
Chapter 5 Component Definition and Maintenance
Figure 243 - Replacing the SGCT
The SGCT and associated control board are a single component. There will
never be a time when the device or the circuit board will be changed individually.
There are 4 LEDs on the SGCT, and the following table describes their
functions:
1. Ensure there is no power to the equipment.
2. Note the position of the fiber optic cables for assembly.
3. To remove the SGCT, it is necessary to remove the gate driver power cable
and fiber optic cables. Exceeding the minimum bend radius (50 mm
[2 in.]) of the fiber optic cables may result in damage.
Adjusting Nut
DO NOT ADJUST calibration nut.
SGCT
Retaining
Screws
Indicating Washer
LED 4 Green Solid Green indicates that the Power
Supply to the Card is OK
LED 3 Green Solid Green indicates that the Gate-
Cathode resistance is OK
LED 2 Yellow LED ON indicates the gate is ON, and
Flashes alternately with LED 4 while
gating
LED 1 Red LED ON indicates the gate is OFF, and
Flashes alternately with LED 3 while
gating
ATTENTION: To prevent electrical shock, ensure the main power has
been disconnected before working on the drive. Verify that all circuits
are voltage free using a hot stick or appropriate voltage-measuring
device. Failure to do so may result in injury or death.