5 |
P a g e
Fig. 10 MO-10 Motor Operator
4.
If all stops at switch elevation have been set,
including the offset bearing, then it is safe to
reinstall the position indicators on the worm
gear mechanism. These indicators should
not quite touch the raised boss on the worm
gear housing in either the open or closed
position. There is a possibility of damage to
the indicators or the coupling if this is not
observed
Motor Operator
For remote operation, a motor operator is
supplied and it should be installed per the
instructions supplied with it.
Step 7—Arcing Horn Installation
Arcing horns are furnished only when horn
gap switches are ordered. When arcing
horns are used, they should be installed and
adjusted after the switches are mounted and
adjusted.
The arcing horn should be adjusted to make
very light contact when the switch is
operated, the main switch contacts should
separate before the arcing horns disengage.
Refer to arcing horn assembly drawing
supplied with the order for detailed
information.
Step 8—Final Checks
The completed 3-pole installation should be
checked for the following:
1.
In the open position, the blades should be
between 90° to 93°.
2.
In closing, blades should make central entry
into their jaws at approximately the same
time.
3.
In the closed position, all blades must be in
full contact with jaws.
4.
All bolts are tight and all cotter pins are bent
adequately.
5.
The single poles are held against or nearly
against their individual rotor bearing stops in
both the open and closed positions and also
the stops on the offset bearings are engaged.
6.
Operating effort required to operate the
switch is not excessive.
Fig. 9 Geared Mechanism
