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7
See Figure 3. The handle of the SCO cutout can be rotated to any of three positions to allow different functions. Refer to Table 1
for the three positions of the SCO cutout.
Figure 3:
SCO Cutout Positions
Table 1:
SCO Cutout Positions
An activated interlock switch means that a connection exists between the wiper (W) (see Figure 3,
Working Diagrams
) and the
normally open (NO on Figure 3,
Working Diagrams
) contact. An interlock switch that is not activated means that there is no
connection between the wiper (W) and the normally open (NO) (see Figure 3,
Working Diagrams
) contact. The W and NO
contacts are used to interlock the CCR via the CCR’s remote control terminal block.
When the cover is removed, the interlock switch is not activated.
Position
Description
Operation
The regulator is connected to the series circuit and the interlock switch (if used) is activated.
Maintenance
The regulator and the series circuit are both shorted and grounded and the interlock switch
(if used) is not activated.
Test and
Measure
The regulator is shorted and grounded; the series circuit is shorted and connected to the measurement socket,
and the interlock switch (if used) is activated. In this position, the insulation resistance of the series circuit can
be measured. The regulator operation can be tested under short-circuited output conditions.
Series Circuit
Series Circuit
Series Circuit
OPERATION
MAINTENANCE
TEST AND
MEASURE
Microswitch
Microswitch
Microswitch
Measurement
Socket
NO
NC
NO
NC
NO
NC
ON
CCR
CCR
CCR
Ground
Ground
Ground
Interlock Switch
Interlock Switch
Interlock Switch
W
W
W
(Activated)
(Activated)
(Activated)
(Activated)
(Not Activated)
(Not Activated)
Cover Rotated to Change Function Positions
Working Diagrams
Operation
Symbol
Maintenance
Symbol
Test and
Measure
Symbol