Page 13
CONCERN
ACTION
If the angle is less than 90
°,
locate the open stop bolt at the base of the rotating
insulator (Left hand side). Loosen the jam nuts on the stop bolt and turn the bolt
inward until the 90
°
angle is obtained. Proper adjustment of the switch in the
open position is accomplished when the moving contact or "beavertail" is at a
90
°
+3
°/-0°.
If the angle is more than 90
°,
locate the open stop bolt at the base of the rotating
insulator (Left hand side). Loosen the jam nuts on the stop bolt and turn the bolt
inward until the 90
°
angle is obtained. Proper adjustment of the switch in the
open position is accomplished when the moving contact or "beavertail" is at a
90
°
+3
°/-0°.
Is it in the 3
phase
arrangement?
If so then:
If the switch does not fully open to 90
°
make sure that the outboard bearing
traveled the complete 190
°
. If not, loosen the stop bolts and turn inward until the
90° opening can be obtain. If the outboard bearing does travel 190
°
and the
bearing is "pulling" the switch open, lenghen the trail radius crank by 1/4" until
90
°
opening can be obtained. For pushing the switch open, lengthening the trail
radius would also be necessary. (pg. 8 & 9)
If the beavertail is under 0
°,
locate the closed stop bolt at the base of the rotating
insulator (right hand side). Loosen the jam nuts on the stop bolt and turn the bolt
inward until the 0
°
flatness is obtained. Proper adjustment of the switch in the
closed position is accomplished when the moving contact or "Beavertail" is at 0
°
+4
°
parallel with the switch base.
If the beavertail is more than 0°, locate the closed stop bolt at the base of the
rotating insulator (right hand side). Loosen the jam nuts on the stop bolt and turn
the bolt outward until the 90
°
angle is obtained. Proper adjustment of the switch
in the closed position is accomplished when the moving contact or "beavertail" is
at 0° +4° parallel with the switch base.
Is it in the 3
phase
arrangement?
If so then:
Manually operate the single pole, driven by the outboard bearing to the closed
position. Verify the moving contact or "beavertail" is at a 0
°
+4
°
parallel with
the switch base. If the outboard bearing is "pushing" the switch closed, then
lengthen the offset rod by using the vernier adjustment until the +4
°
closing can
be obtained. For pulling the switch closed shortening the offset rod should be
necessary. (pg. 8)
Blade is too high in the jaw, not in
the centerline of the contact
springs
If the height is more than the suggested 5/8" off of the stop, lengthen the
assembly by turning the clevis clockwise in 1/2 turn increments until the correct
height is achieved.
Blade is too low in the jaw, not in
the centerline of the contact
springs
If the blade is driving into the stop creating a binding situation, shorten the
assembly by the turning the clevis counter-clockwise in 1/2 turn increments until
the correct height is achieved.
Switch will completely open, but
not completely close
Check the degree of angle between the interphase crank and the multi-angle
crank on the drive phase. Set to the degree angle indicated on the Control
Drawing Plan View.
Switch will completely close but
not completely open
Check the degree of angle between the interphase crank and the multi-angle
crank on the drive phase. Set to the degree angle indicated on the Control
Drawing Plan View.
Outside phase(s) will not
completely turn flat.
Typically, it is better to over travel the moving contact on the drive phase to the
m4 to allow for any lost motion once the remaining phases are
connected. This will allow these phases to fall within the 0 to -4 tolerance.
All three phases are inconsistant,
not working together.
Manually operate the switch to open and verify adjustment needs. Fine-tuning of
the new phase can be accomplished by slightly shortening or lengthening the
interphase rod. Use the vernier adjustment on the center phase to lengthen or
shorten the interphase pipe, depending on whether you need more opening or
closing. (pg. 9)
Trouble Shooting Guide
Blade isn't completely flat when
closed
If so then:
Is this at the
single pole
assembly level?
If so then:
Is this at the
single pole
assmebly level?
Blade doesn't open to 90 degrees
