GE Industrial Solutions AF-600 FP High Power (460V_575V 150HP and above) - Manual (Page 73)

6.2 Static Test Procedures
All tests should be made with a meter capable of testing diodes. Use a digital volt/ohmmeter (VOM) set on the diode scale or an analog ohmmeter set on Rx100
scale. Before making any checks disconnect all input, motor and brake resistor connections.
Illustration 6-3 Power Card PCA Connector Identification is provided as a reference for finding the appropriate connectors described in the test procedures in this
section. Some connectors are optional and not on all frequency converter configurations.
NB!
For best troubleshooting results, it is recommended that static test procedures described in this section be performed in the order presented.
Diode Drop
A diode drop reading will vary depending on the model of ohmmeter. Whatever the ohmmeter displays as a typical forward bias diode is defined as a diode
drop in these procedures. With a typical DVM, the voltage drop across most components will be around .300 to .500. The opposite reading is referred to as infinity
and most DMVs will display the value OL for overload.
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130BX172.10
Illustration 6.5: Power Card, and Mounting Plate
380–480V: Yellow tape on the main SMPS transformer in the upper right corner.
525–690V: White tape on the main SMPS transformer in the upper right corner.
1 Power card PCA3 9 MK106
2 Mounting plate 10 MK100
3 MK110 11 MK109
4 MK102 12 FK102
5 MK104 13 MK112 terminals 4, 5, 6
6 MK105 14 MK112 terminals 1, 2, 3
7 MK107 15 Scaling card
8 FK103 16 Scaling card standoff
AF-650 GP and AF-600 FP High Power Service Manual
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