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Page 21
4.2 FUSING AND SAFE OPERATION
CONTROL FUSE-
This fuse, a 1/4 A, is used to protect the control circuits. The fuse
holder is located in the upper left corner of the contactor door
opening or within the “S” Cabinet.
VALVE FUSES
-
These fuses, a 2AG 1 A, are used to protect the valve circuits. These
fuses are located on the TERMINAL STRIP PCB.
IGNITOR FUSES -
These fuses, BAF 6 A, two per contactor (supplied with ignitron tube
retrofit controls only), are used to protect the ignitor circuits of the
ignitron tubes. The fuse holders are located on the IGNITRON
FIRING BOARD MODULE, A/N 410318.
CAUTION
:
INSTALL PROPERLY SIZED FUSES IN SERVICE DISCONNECT SWITCH. CHECK
WELDING MACHINE MANUFACTURER'S RECOMMENDATIONS.
WARNING
:
VOLTAGES PRESENT IN THIS CONTROL CAN CAUSE SEVERE OR FATAL
INJURY. DO NOT SERVICE ANY COMPONENT WITH POWER “ON”.
USE ONLY THE FUSE TYPE SPECIFIED TO MAINTAIN SAFE OPERATION.
Observe the
WARNING,
DANGER
and
CAUTION
labels affixed to the control to
maintain safe operation. Some of them are shown on the Figure 4.2.
Figure 4.2 Warning, Danger and Caution Labels
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Содержание EN1000 series
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Страница 19: ...Page 17 Figure 3 6 External SCR Contactor connection S t o c k C h e c k c o m ...
Страница 120: ...Page 118 11 3 TROUBLESHOOTING GUIDE S t o c k C h e c k c o m ...
Страница 121: ...Page 119 S t o c k C h e c k c o m ...
Страница 122: ...Page 120 11 4 BLOCK DIAGRAM S t o c k C h e c k c o m ...