S&C Instruction Sheet 775-510
19
STEP 25.
Close the disconnect by pushing the operating
ring into the contact. See Figure 19. When the
blade contact latch is completely closed, the
operating ring will tilt backward into the blade
contact. Disengage the hookstick from the
operating ring. Repeat with the remaining two
disconnects. The switch can now be closed.
The disconnects are mechanically blocked
in the
Closed
position while the switch is in the
Closed
state.
Emergency Manual Operation
STEP 26.
Scada-Mate SD Switches are capable of manual
interrupter operation. In the event of electrical
power loss, a standard or extendible hookstick is
used to open and close the interrupters. If the
spring is fully discharged, pull on the operating
mechanism pull-ring with the hookstick seven to
nine times to effect a change of state. If the spring
is partially charged, a single pull will change the
interrupter position. See Figure 20.
Figure 19. Push the blade into contact.
Figure 20. Manual operation with a hookstick.
Operation—For Switches with Power Operator
Pull ring downward
Hookstick
Operating
ring
Push ring upward
Indicator in
Open position
