ABB
ACS 6000 Maintenance Manual
3BHS202077 ZAB E01 Rev. C
2-1 (6)
Chapter 2 - Checking IGCTs and Diodes
IGCTs and diodes of phase modules can only be tested after the converter
has been deenergized and grounded.
Danger: The ACS 6000 is a high violtage device.
Make sure that the drive has been completely deenergized and that power
cannot be applied by accident.
Failure to do so may result in injury or death.
2.2.1
Required Tools and Accessories
To test IGCTs the following is needed:
•
Fiber optic cable (approx. 2 m long)
•
Multimeter
2.2.2
Test Procedure
The IGCT to be tested can stay in the phase module. The test is carried
out in two steps:
Step 1
1
Deenergize and ground the ACS 6000 but leave the power supply for
the gate units on.
2
Check the IGCT for burned components. In this case the whole IGCT
must be replaced. Check that both LEDs are on. See
Figure 2-1
(
Figure 2-1 depicts the horizontal fitting position of IGCTs as applied
in 7/9 MVA phase modules).
Figure 2-1
IGCT
2.1
Safety
2.2
Checking IGCTs
LEDs
Fiber optic cable
