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Appendix
Appendix
Appendix A: Operating Mechanism Installation
Manual and Motor Operated
These switches are designed to be opened and closed as a three-phase unit by a system of
pipes that translates the rotation movement of an operator on the ground - whether manual or
motor - to simultaneous rotation of the end insulator of each switch pole. Figure 1 shows
alternate operating mechanism designs, each of which is employed as being the simplest
arrangement for a given structure. In all cases, however, the operating principle re-mains the
same, and the methods of in-stallation and adjustment are virtually identical.
Refer to the Operating Mechanism Drawing provided with your switch and follow these steps:
1) Have all switch poles completely closed. Install all components shown on the Operating
Mechanism Drawing, including interphase pipe, vertical pipe, all brackets, bushings, etc.,
and the adjustable crank arm.
Figure 9: Alternate Operating Mechanism Designs
Figure 10: Operating Mechanism
The weight of the vertical pipe must be entirely supported by the pipe collar above
the vertical bearing. The housing of neither the manual gear operator nor the motor
operator was designed to support this weight. Additionally, if the vertical pipe is not
suspended at the dimension shown, the decoupler mechanism will jam. A gap of no
less than 1/4” gap is needed between the operator and the control coupling.
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