Disconnect

determined by the degree to which the springs are

5-17. Disconnect

compressed by the bolt and nut which hold the assembly

together.

a. General. The disconnects are attached to the

circuit breaker studs at the rear of the breaker. each

b. Disconnects Replacement. If for any reason the

disconnect assembly consists of four pairs of opposed c

disconnects must be replaced or removed, the position of

contact fingers. The contact fingers (fig.5-11) are secured

the nuts on the bolts should be carefully noted and the

to the breaker stud by two bolts which pass through the

number of turns of the nut must be counted This is

assembly and the stud of the enclosure. The disconnect

important because in reassembly the original amount of

fingers exert a set amount of force against the stationary

compression can be restored by replacing the nuts in

stud through the action of the compression springs.

their former position on the bolts.

The primary

Retainers and spacers hold the contact fingers in correct

disconnects should always be kept lubricated with a

alignment for engagement with the stud. The amount of

grease according to the l current Lubrication Order.

force which the fingers exert against the stud is

Figure 5-11. Circuit breaker. right rear oblique view.

and disengage.

5-18. Drawout Mechanism

b. Operation. The drawout mechanism is equipped

a General Drawout breakers are furnished with a

with a drawout trip interlock which prevents a racking

drawout mechanism which facilitates the inserting and

operation from being performed when the breaker is

withdrawing of the breaker from its c compartment It

closed. Inserting the breaker into the compartment

provides a suitable means of forcing the breaker through

causes the racking pins on

the part of inserting and withdrawal operations when the

stationary and movable halves of the disconnect engage

5-15