Troubleshooting 10-5 – Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE User Manual

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TROUBLESHOOTING

10-5

1557-UM050F-EN-P – June 2013

BULLETIN 1557 LINE SIDE (DCB2) and MACHINE SIDE (DCB1) CONTROL BOARD

OSCILLOSCOPE MONITORING TEST POINTS

CONNECTION

LINE SIDE CONTROL BOARD

MACHINE SIDE CONTROL BOARD

V12 / TP1

LINE VOLTAGE, VAB

MOTOR VOLTAGE, VAB

V23 / TP2

LINE VOLTAGE,VBC

MOTOR VOLTAGE, VBC

V31 / TP3

LINE VOLTAGE, VCA

MOTOR VOLTAGE, VCA

VDC / TP4

DC LINK VOLTAGE

F12 / TP5

RECONSTRUCTED LINE VOLTAGE

MOTOR FLUX

F23 / TP6

RECONSTRUCTED LINE VOLTAGE

MOTOR FLUX

F31 / TP7

RECONSTRUCTED LINE VOLTAGE

MOTOR FLUX

FLX / TP8

RECTIFIED LINE VOLTAGE

RECTIFIED MOTOR FLUX

I1 / TP9

LINE CURRENT, Phase A

MOTOR CURRENT, Phase A

I2 / TP10

LINE CURRENT, Phase B

MOTOR CURRENT, Phase B

I3 / TP11

LINE CURRENT, Phase C

MOTOR CURRENT, Phase C

IDC / TP12

DC LINK CURRENT

RECTIFIED MOTOR CURRENT

VNG / TP13

LINE NEUTRAL TO GRD VOLTAGE

MOTOR NEUTRAL TO GRD VOLTAGE

AO1 / TP14

ASSIGNABLE ANALOG OUTPUT

AO2 / TP15

ASSIGNABLE ANALOG OUTPUT

AO3 / TP16

ASSIGNABLE ANALOG OUTPUT

AO4 / TP17

ASSIGNABLE ANALOG OUTPUT

COM / TP18

ANALOG COMMON

NOTE: All test points are referenced to ground, the scope common must be connected to cabinet ground.

V12 / TP1, V23 / TP2, V31 / TP3, VNG / TP13

Approximately 5 volts RMS nominal

VDC / TP4

Approximately 6.75 volts nominal

F12 / TP5, F23 / TP6, F31 / TP7

Approximately 5.32 volts RMS nominal

FLX / TP8

Approximately 7.53 volts peak nominal

I1 / TP9, I2 / TP10, I3 / TP11, IDC / TP12

Approximately 5 volts peak nominal