Hobart 6T28-600CL Operation And Maintenance Manual page 46

OM-2244 / Operation and Maintenance Manual
DCS-600/ Series 500082 / Solid State Transformer-Rectifiers
Test Point Function
TP1 SCR Gate Pulse Phase 3
TP2 SCR Gate Pulse Phase 2
TP3 PC Board Common
TP4 +10.0 VDC Timer Voltage
TP5 +15 V Regulated Voltage
–15 V Regulated Voltage
TP6
TP7 +24 V Unregulated Voltage
TP8 SCR Gate Pulse Phase 1
TP13 Actual Output Voltage (28.5 or 14.25)
TP14 Null at zero output current: provides amplified
load amp reading for comparison with
overload limit (TP20) and starting amperage
limit (TP21) set by R13 control on front panel.
TP15 PC Board Common
TP17 Voltage Slope Test Point
TP19 Reference Volt Test Point
TP20 Overload Limit
TP21 Starting Current
TPD SCR Gate Timer Output Phase 3
TPE SCR Gate Timer Output Phase 2
TPF SCR Gate Timer Output Phase 1
TPL Overload Trip Summing Point
Table 1 GPU Circuit Board Test Points and Controls
December 15, 2014
Signal Controlled by:
R10
R9
R109 (-28.5 V) or
R110 (-14 V)
R38
R102
R101
R60
R13 (front panel)
Chapter 2-2
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