Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) Commissioning - ForGe Control - Manual (Page 53)

Rockwell Automation Publication 7000-IN012B-EN-P - June 2014 53
Commissioning the Drive Chapter 4
Figure 38 - SCR snubber circuit connections
SCR Resistance Measurement Measured Resistance
Inverter Rectifier (SCR only)
SCR Anode-Cathode Resistance (heat sink to
heat sink) k-
Ω
(Lowest) (Highest) (Lowest) (Highest)
SCR Gate-Cathode Resistance (across SCR
Phoenix Connector)
Ω
Snubber Resistance (Test point: Heat sink
above)
Ω
(Lowest) (Highest) (Lowest) (Highest)
Snubber Capacitance (Test Point – heat sink
on Right) μF
(Lowest) (Highest) (Lowest) (Highest)
Sharing Resistance (Red wire from snubber
Phoenix connector—heat sink on left) k-
Ω
(Lowest) (Highest) (Lowest) (Highest)
Heatsink Heatsink
To Gate Driver Board
Heatsink Heatsink
Snubber
Resistor
Snubber
Capacitor
Sharing Resistor
Test Point