Issue:
Perform a Static Test on an Altivar 320

Product Line:
ATV320

Environment:
ATV320 all series

Cause:
Test needed to check for short.

Resolution:
Checking The Input and Output Diode Bridges
This test is done using a digital multi-meter in diode test mode to check that the transistors and diodes are not short-circuited.


ALL TESTS ARE TO BE PERFORMED WITH ALL SOURCES OF POWER REMOVED FROM THE DRIVE

Drive uses all diodes on the Input and Output Diode Bridge.

• Instrument
  • Use Digit-Meter with a diode scale
• Measurement
  • ​Locate PA+ and PC- input on drive power terminals (should be close to your power connection terminals)
  • Set meter to diode scale
  • To measure Input diodes
    • Place black on positive bus (PA+) and red on L1
    • Get readings and then move to L2, and then L3
    • When done swap red and black probes, and measure again between (PA+) to L1...L3
    • Readings should be OL in one direction and a low voltage reading the other way (Example 0.3v)
  • To measure Output diodes
    • Place black on positive bus (PA+) and red on T1
    • Get readings and then move to T,2  and then T3
    • When done swap red and black probes , and measure again between (PA+) to T1...T3
    • Readings should be OL in one direction and a low voltage reading the other way (Example 0.3v)