Rockwell-automation 6000 PowerFlex Medium Voltage Variable Frequency D Instrukcja Użytkownika Pobierz pdf (Strona 27)

Rockwell Automation Publication 6000-IN007A-EN-P - October 2014 27

Preparation and Inspection Chapter 2

10. Remove the Analog Interface board and disconnect all of the terminals

from the Control Unit.

Figure 9 - Back of Control Unit

Connect the Insulation Meter

1. Connect the red wire from the insulation meter to the U Phase and the

black wire to the grounding bus.

2. Use jumper wires to make the connections as shown in Figure 10

The jumper wires must be rated for greater than 5 kV or must maintain

sufficient clearance to any metal surface.

3. If the Megger has a lower voltage setting (normally 500V or 1000V), apply

that voltage for 5 seconds as a precursor for the higher voltage rating. This

may limit the damage if there is a problem. If the reading is very high, apply

the test voltage per Figure 10

4. Perform a Megger test with the insulation meter voltage set according to

the voltages shown in Table 7

for 1 minute and record the result.

The test should produce a reading greater than the minimum values listed

below. If the test results produced a value lower than these values start

segmenting the drive system down into smaller components and repeat the

test on each segment to identify the source of the ground fault.

Analog Interface Board

location on Control Unit

Control Unit terminals

ATTENTION: Verify the drive and any connected equipment is clear of

personnel and tools prior to commencing the Megger test. Barricade off

any open or exposed conductors. Conduct a walk-around inspection

before commencing the test.

ATTENTION: Discharge the Megger prior to disconnecting it from the

equipment.

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Rockwell-automation 6000 PowerFlex Medium Voltage Variable Frequency D Instrukcja Użytkownika Strona 27