Manually Operated Mechanism - ABB K-Line 225A Installation & Maintenance Instructions Manual

ABB
6. Open the breaker with the manual trip button.
7. Resume slow closing with steps #2, #3, and #4.
Referring to the previous warning, reset the charging
cranks for normal electrical operation as follows:
8. Repeat previous steps #5 and #6.
9. Lift manual close lever to close the contacts.
10. Push the manual trip button to open the contacts.
The closing springs are now discharged with the
charging cranks reset. Restore power to the charging
motor with the MDS in the ON position. The
mechanism is ready for electrical operation.

Manually Operated Mechanism

1. On 1600 and 2000 ampere breakers, at each of
the two spring guards, loosely install 1/4" diameter
pins or machine screws as shown in Figure 4 (not
necessary for 800 A and under frame sizes).
2. Insert a screwdriver through the hole in the
escutcheon box and
assembly (right-hand side when facing the front of
the circuit breaker.)
3. Using the top of the hole as the fulcrum and a
screwdriver or rod as a lever, depress the hold-up
latch. At the same time, pull the operating handle
forward enough to engage the slow-close latching,
then work the handle in one stroke to move the
contacts through the open-to-close range.
WARNING
Keep a firm grip of the handle, which is loaded with the energy
of the mechanism when slow closing.
4. Remove the two 1/4" diameter pins or machine
screws installed in step #1 after the slow-close
operation is complete, else the mechanism cannot
be charged and closed in the normal operating
mode.
Note: The step #1 operation, as illustrated in Figure
4, is not necessary for adjusting the simultaneous-
make. However, without the temporary pins, the
breaker will not latch closed.
Courtesy of NationalSwitchgear.com
mechanism housing
IB 6.1.12.1-1C
Figure 3. Slow-close Lever on EO
breakers. Located on the escutcheon box
right-side. Depress lever with a screwdriver.
Figure 4. Temporary Screws. Installed for
slow-close latching 1600 and 2000 frame
size MO breakers.
Figure 5. Slow-close Lever on MO
breakers. Located on the escutcheon box
right-side. Depress lever with a screwdriver.
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