S&C Mark VI Instructions For Installation Manual page 44

WIRING AND ADJUSTING THE SWITCH OPERATOR
c. Determine which "a1" contacts are not in the closed posi-
tion. A contact is closed if its roller is disengaged from a
cam, and is open if its roller is engaged by a cam.
d. For the "a1" contacts that are not in the closed posi-
tion, raise (or lower) the corresponding cam toward its
adjacent spring until the cam is separated from the teeth
of the inner gear. Rotate the cam so that when lowered
(or raised) it will be disengaged from the roller. Lower
(or raise) the cam making sure that the teeth mesh with
the inner gear and that the cam is disengaged from the
roller.
e. Reinsert the motor-circuit fuseholder.
f. Operate the switch operator to the fully open position.
Remove the motor-circuit fuseholder and, if necessary,
adjust the cams as described in (d) above until all "b1"
contacts are in the closed position.
g. Reinsert the motor-circuit fuseholder and operate the
disconnect. Both sets of contacts should now be correctly
Set screws (loosen to
adjust switch operator
position indicators)
Travel-limit switch
"a1" contacts
closed
"b1" contacts
open
"a1" contacts
closed
"b1" contacts
open
Switch operator in
fully closed position
Figure 61. Travel limit and auxiliary switches.
712-502
degree increments, any "a1" contact can be changed to a
"b1" contact, or vice-versa. Because of the many positions
to which the cams can be adjusted, various rollers can
be engaged or disengaged to open or close their contacts
either simultaneously, sequentially, randomly, or in various
combinations. Adjustment of the auxiliary switch for other
than the "standard" contact configuration is left to the user.
The motor-circuit fuseholder should be removed when
adjusting these contacts. (Switch operators furnished with
the Catalog Number Suffix "-Q" option are equipped with an
extra auxiliary switch, Terminals 27 through 34, having four
contacts—two "a1" and two "b1"—which may be adjusted
as described in (a) through (g) above.
Opening-stroke
travel-limit disc
Closing-stroke
travel-limit disc
Auxiliary switch,
8-PST
Extra auxiliary
switch, 4-PST
(Catalog Number
Suffi x "-Q")
44
positioned for both the open and closed position of the
disconnect. Suffi cient adjustment is available to provide
correct positioning of both sets of contacts.
Since each cam can be individually adjusted in 4.5-
Travel-limit switch
"a1" contacts
open
"b1" contacts
closed
"a1" contacts
open
"b1" contacts
closed
Switch operator in
fully open position
Auxiliary switch,
8-PST
Extra auxiliary
switch, 4-PST
(Catalog Number
Suffi x "-Q")