S&C Instruction Sheet 1045M-510
29
Installing the Reciprocating Switch Operator
NOTICE
The switch operator is designed to minimize problems caused by minor variations
in operator-switch geometry due to age and environmental effects. However, if it is
not securely fastened to the pole, excessive movement of the switch operator can
result in incomplete switch operation and potentially serious damage to the switch
mechanism.
Periodic inspection and maintenance of switch operator mountings and control
linkages is essential for identifying problems and patterns of problems
MANUAL OPERATING
HANDLE FITS HERE
OUTPUT
CRANK
LOCKOUT BRACKET
(MANUAL MODE ONLY)
MOUNTING CHANNEL
(BOLTED TO UTILITY
POLE)
DECOUPLING
MECHANISM
1 1/4 IPS THREADED
CLEVIS COUPLING
13/16
(21)
3 X
2.250
(57)
24
(610)
24 (610)
1
(25)
5
(127)
26 1/2 (673)
Ø
Ø
Ø
Figure 16. The reciprocating switch output crank mechanism, rear view, dimensions are
inches (mm).
STEP 5.
Install the operating rod guides. The switch manufacturer’s recommendations
should be followed for installation and spacing of operating rod guides. If
excessive flexing is observed during operational testing of 1-inch (25mm)
fiberglass or steel rods, additional and/or smaller diameter guides can be
installed. Standard
⅝
-inch galvanized eye nuts have been field proven to work
well as guides.
STEP 6.
Maximizing the fault-close capabilities (if applicable). When the 6801M Switch
Operator is applied at circuit locations where fault currents exceed 6-8 kA, S&C
recommends that additional steps be taken to maximize the fault close capability
of the switch and 6801M Switch Operator.
To obtain the maximum fault-close capability when the switch operator is
installed with an S&C Omni-Rupter Switch, using a 1-inch (25 mm) fiberglass
or steel operating rod, guides should have a maximum inside diameter of 1
½
inches (38 mm). In addition, the lowest and highest guides should be located
a maximum of 3 feet (914 mm) from the top of the switch operator and the
switch lever arms. All intermediate guides should have a maximum spacing of
4 feet (1219 mm). All operating rod guides should be aligned to minimize drag
during operation. The operating rod should be connected to the switch operator
output crank in Hole# 5 from the hinge point, next to the outermost hole. The
switch operator should also be configured to apply 200 ft-lbs of closing torque
on the operating rod. See Instruction Sheet 1045M-530, “S&C 6801M Automatic
Switch Operators:
Setup”
for more information.
