S&C Instruction Sheet 768-550 19
Operation
Disconnect Operation
An integral hookstick-operated, three-pole dis connect is built
into every Scada-Mate Switching System to provide visible
air-gap isolation of switched-open circuits.
Follow these steps to open the disconnect:
STEP 1.
Place the LOCAL/REMOTE switch inside the
communication and control unit in
Local
mode.
Operation can only occur now by local control or
manually by using a hookstick.
STEP 2.
Open the interrupter contacts by pressing the
OPEN pushbutton.
STEP 3.
Open the disconnect by pulling on the disconnect
operating lever with a suitable hookstick. The
disconnect will not open unless the interrupter
contacts are in the
Open
posi tion.
Refer to Instruction Sheet 768-500, “S&C Scada-
Mate Switching Systems: Outdoor Distribution
(14.4 kV through 34.5 kV).”
STEP 4.
Provision for tagging the three-pole
dis connect are provided when the disconnect is in
the open position. Refer to Instruction Sheet 768-
500, “S&C Scada-Mate Switching Systems: Outdoor
Distribution (14.4 kV through 34.5 kV).”
Note:
For a Type CCU-SP, the DISCONNECT-NOT-LATCHED
indicator is lit when the dis connect is not fully closed. See
Figure 18. For a Type CCU-XP, the VISUAL-BREAK indicator
is lit when the disconnect is not fully closed. See Figure 19.
Figure 19. The Type CCU-XP VISUAL BREAK indicator is lit when
the disconnect is not fully closed.
Figure 18. The Type CCU-SP DISCONNECT NOT LATCHED indica-
tor is lit when the disconnect is not fully closed.
Visual break
indicator
