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Troubleshooting 10-13 – Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE User Manual

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TROUBLESHOOTING

10-13

1557-UM050F-EN-P – June 2013




Typical waveforms

16.67ms

0V

(13-20V)

(2.5V-3.5V)

(-0.5V)

5 volts/cm 2.5 µs/cm

SCR Gate to Cathode Voltage


(13V-18V)

(-0.5V)

(2.5V - 3.5V)

0V

Tau = 5us

5 volts/cm 2.5 µs/cm

SCR Gate to Cathode Firing Voltage