GE Industrial Solutions ASTAT-CD Plus Solid-State Starters - Manual (Page 29)

ASTAT-CD Plus Service Instructions
29
the metal gauge (8) can be easily moved.
NOTE: The tension bolts should not be
tightened beyond the point that the metal
gauge (8) can be easily moved. Never adjust
the preset nut (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.