GE Industrial Solutions AF-600 FP High Power (460V_575V 150HP and above) - Manual (Page 150)

9 Special Test Equipment
9.1 Test Equipment
Test tools have been developed to aid in troubleshooting these products. It is highly recommended for repair and servicing this equipment that these tools be
available to the technician. Without them, some troubleshooting procedures described in this manual cannot be carried out. Although some test points can be
found inside the frequency converter to probe for similar signals, the test tools provide a safe and sure location for making necessary measurements. Test
equipment described in this section is available from GE.
Using the test cable allows powering the frequency converter without having to charge DC bus capacitors. Main input power is required and
all devices and power supplies connected to mains are energised at rated voltage. Use extreme caution when conducting tests on a powered
frequency converter. Contact with powered components could result in electrical shock and personal injury.
9.1.1 Test Cables and SCR Shorting Plug Kit p/n 6KAF6H8439
This tool provides the ability to power up the Switch Mode Power Supplies
(SMPS) and activate all the control functions of the frequency converter with-
out having the DC bus capacitors charged. It provides protection for trouble-
shooting gate drive signals and other important control signals within the
frequency converter.
The test kit includes the shorting plug and connector cables. The cable is
connected between the soft charge card and the power card. The SCR short-
ing plug shorts the gates of the SCRs to ensure they do not fire and add a
charge to the DC bus.
130BX64.10
Illustration 9.1: SCR Shorting Plug
Illustration 9.2: Two-pin 4x-frame Test Cable
Illustration 9.3: Three-pin 5x-frame Test Cable
AF-650 GP and AF-600 FP High Power Service Manual
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