Self-powered sgct power supply - sps, Board calibration, Test points – Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - ForGe Control User Manual
Page 101: Board calibration test points
Rockwell Automation Publication 7000-UM202B-EN-P - June 2014
101
Component Definition and Maintenance
Chapter 3
Self-Powered SGCT Power
Supply - SPS
This board is a component in drives that does not use the IGDPS module to
power the rectifier SGCTs. The SPS board extracts energy from the associated
SGCT snubber circuitry to provide the 20V DC required to power the SGCT
device.
The SPS Board has two snubber connection inputs and two 20V DC connection
outputs. Snubber connection inputs are derived from opening the to SGCT
cathode connection and bringing these connections to the SPS board
(
).
Figure 90 - Snubber Circuit for SGCT module (with SPS board)
Board Calibration
This board requires no field calibration.
Test Points
The green LED (DS1) on the SPS board indicates that the 20V DC output is
within operating specification range.
TP4
300V DC bus
TP6
300V DC bus common
TP15
20V DC output
TP14
20V DC output common
Rsn-2
Rsn-1
Anode
Cs-1
Rsh
Cs-2
Snubber
Resistor
Test
Cathode
Heatsink
Heatsink
SPS Board
J1-1
J1-2
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