Issue:
How to perform a Static Test on an Altivar Process drives.

Product Line:
Altivar Process Drive (ATV630, ATV930, ATV650, ATV950)

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

For Altivar Process Drive up to 25hp

• Range: ATV630...  ATV930....
  • U07M3 to D18M3 and U07N4 to D18N4
• Range: ATV650... ATV950...
  • U07N4 to D18N4
• 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
    • Repeat the entire procedure measuring from PC- instead of PA+.
    • Readings should be OL (should be above 1.0 and may continue to increase to OL if the meter is left connected long enough) 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
    • Repeat the entire procedure measuring from PC- instead of PA+
    • Readings should be OL in one direction and a low voltage reading the other way (Example 0.3v)
    • 

For Altivar Process Drive over 25hp

• Range: ATV630...  ATV930....
  • D22M3 to D75M3 and D22N4 to C31N4
• Range: ATV650... ATV950...
  • D22N4 to D90N4
• Drive uses SCRs on the positive input bridge and diodes on the negative. For the Output Bridge its all diodes.
• Instrument
  • Use Digit-Meter with an ohm and a diode scale
• Measurement
  • ​Locate PA+ and PC- input on drive power terminals (should be close to your power connection terminals)
  • To measure Input SCRs and diodes.
    • Set meter to diode scale
    • 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 1.0 - OL in both directions (should be above 1.0 and may continue to increase to OL if the meter is left connected long enough).
    • Set meter to diode scale
    • Place black on positive bus (PC-) 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 (PC-) 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 T2 ,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)

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