GE Industrial Solutions ASTAT-CD Plus Solid-State Starters - Manual (Page 6)

ASTAT-CD Plus Service Instructions
6
Step 23. Reassemble Bus Bars and MOVs to SCR
Modules with torque of 26 in lbs.
Step 24. Reassemble Protection Board, Power Supply
Board, Logic Board, cover and terminal
connectors using Steps 17, 11, 5 and 6.
Light
+
+
- -
S2
S1
20 Ω
1W
(SCR)
Cathode
Anode
Gate
(~.15AMP to .20AMP LOAD)
5VDC
Figure STC
SCR Test Circuit
Remove all power from ASTAT-CD Plus
With S1 closed and S2 open, the lamp should be off.
If lamp is on, SCR is shorted.
With S1 closed and S2 closed, the lamp should turn on.
When S2 is opened, lamp should stay on. SCR is good.
SCR must be disconnected from ASTAT-CD Plus control (yellow and blue
leads disconnected from SCR) and no load connected to ASTAT-CD Plus.