GE Industrial Solutions Power Break II Motor Operator - Manual (Page 8)

Power Break® II Motor Operator Mechanism
Installation in 2500–4000 A Draw-Out Breaker
8
Installation in 2500–4000 A Draw-Out
Breaker
W W W W A A A A R R R R N N N N IIIIN N N N G G G G :::: Before installing any accessories, turn the
breaker off, disconnect it from all voltage sources, and
discharge the closing springs.
A A A AV V V VE E E ER R R RT T T TIIIISSS SSSS SE E E EM M M ME E E EN N N NT T T T:::: Avant d’installer tout accessoire,
mettre le disjoncteur en position OFF, le déconnecter de
toute tension d’alimentation, et décharger les ressorts
d’armement.
Use the following procedure to install the Motor Operator
Mechanism onto a 2500–4000 A draw-out circuit breaker.
1 1 1 1 .... Verify that the rating on the Motor Operator
Mechanism identification plate matches the
voltage rating required for the application, as
listed in Table 1.
2 2 2 2 .... Check that the package contains all the parts listed
in Table 2. If any components are missing, contact
the ED&C Customer Support Center at 800-843-
3742. Note that the Remote Close and Shunt Trip
accessories are not included with the Motor
Operator Mechanism; they must be ordered
separately.
3 3 3 3 .... Verify that the charge arms of the Motor Operator
Mechanism are in the discharged position, as
illustrated in Figure 2.
4 4 4 4 .... Turn the breaker off and discharge the closing
spring by depressing the OFF and ON buttons in
the sequence OFF-ON-OFF. Verify that the breaker
OFF-ON indicator shows OFF on a green
background and that the charge indicator shows
DISCHARGED on a white background.
5 5 5 5 .... Engage the 1 ⁄ 2 -inch square end of the racking
shaft with the supplied wrench, catalog number
TDORT, as illustrated in Figure 8, and rotate the
shaft counter-clockwise to withdraw the breaker to
the DISCONNECTED position.
6 6 6 6 .... Attach a Lifting Bar, catalog number TDOLB, by
locating the hooks on the bar beneath the shoulder
studs on the breaker, as illustrated in Figure 11.
7 7 7 7 .... Remove the breaker from the draw-out substructure
and place it on a suitable work surface. Place the
breaker on supports so that the weight of the
breaker is not supported by the side plates, as
shown in Figure 17.
8 8 8 8 .... Loosen the four #8-32 screws on the trim-plate
assembly, if so equipped, and remove the trim
plate. If stand-offs are also installed, remove those
as well.
9 9 9 9 .... Loosen the four screws at the corners of the breaker
cover. Crank the operating handle one time and
hold it extended to remove the cover from the
breaker face, as illustrated in Figure 3. The Motor
Operator can be safely installed with such a
partially charged mechanism.
Figure 17. 2500–4000 A draw-out breaker side panel, showing the wire
ties, bolts, and clip to be removed.
1 1 1 1 0 0 0 0 .... Remove the retaining screw and snap ring (using
an appropriate snap ring pliers) that hold the
chain guard in place on the rear of the breaker, as
shown in Figure 12, then remove the guard. Be
careful not to lose the white nylon interlock
plunger that may fall out of the back of the
breaker, as it must be reinstalled when the breaker
is reassembled.
1 1 1 1 1 1 1 1 .... Rotate the chain until the removable link, shown in
Figure 18, is accessible on the chain drive
sprocket. Slide a screwdriver blade into the
retaining clip and pry one side up, as shown, then
remove the clip by sliding the clip off the pins.
Remove the two parts of the link, then remove the
chain from the drive sprocket.
1 1 1 1 2 2 2 2 .... Remove the wire ties that hold the wire bundle
connected from the secondary disconnect to the
breaker side plate, shown in Figure 17. Remove the
screw and clip, also shown in Figure 17. Remove
the two
3 ⁄ 8 -16 bolts directly above and below the
chain drive sprocket.
1 1 1 1 3 3 3 3 .... Remove the two screws in the secondary disconnect
mounting bar indicated in Figure 17, then slide
the secondary disconnect and the two rods toward
the front of the breaker and lift them out and away
from the side plate.
Secondary
Disconnect Screws
Wire
Ties
Side
Clip
Upper Mounting
Tab (Under Clip)
Side Plate
Bolts
Lower
Mounting Tab