Page 14
I.B. 70A2580H02
Effective November 2012
4-8.2 OPERATION CHECK PERFORMANCE
Move the VCP-Wind circuit breaker to the TEST position
following the procedure described in Paragraph 4-8.1. As
soon as control power becomes available, the motor will
charge the closing springs with this condition indicated by
a Spring Charged/Discharged Indicator on the front of the
circuit breaker (Figure 3-4).
In addition, the status of the
main contacts, open or closed, is indicated on the front of
the circuit breaker.
Using the close and open buttons on the front of the
circuit breaker, close and trip the circuit breaker several
times to verify the closing and tripping operations.
Conclude the check by opening the circuit breaker.
4-9 BREAKER/STRUCTURE INTERFACING
Type VCP-Wind Vacuum Circuit Breakers are supplied
with a series of interlocks to insure safe and proper
interfacing between the circuit breaker and a compatible
structure compartment. The specific interlocks are
described in the next paragraph to provide the proper
familiarization. Once the interlocks are reviewed, an
interfacing check can be performed as described in
Paragraph 4-9.2.
4-9.1 INTERFACE INTERLOCKS
Each circuit breaker is supplied with the following inter-
locks to insure safe and proper operation.
Code Pins
Code pins are mounted at the bottom of the circuit
breaker to prevent the insertion of a circuit breaker into a
structure of higher power rating. A set of code pins on the
circuit breaker and a corresponding set in the
compartment form this interlock. See Tables 7.2 through
7.5 for MiniMod Code Pin locations.
NOTICE
Code Pins do not block out control voltage or
scheme incompatibility.
4-9.2 DRAWOUT BREAKER INTERFACING
CHECK
Keep in mind that an interfacing check will be made
with a compatible structure. As such, the instructions
provided with the assembly will suggest other
interfacing conditions that should be observed and/or
checked, such as primary shutter operation,
MOC/TOC operation and levering handle insertion. A
complete, coordinated inter-face check, therefore, will
be a blend of the circuit breaker instructions and
those provided with the structural assembly. Together
all required standards are met and the ultimate in
safety is achieved.
Reference the procedures outlined in Paragraph 4-
8.1 to complete the following interface checks.
When the secondary contacts are engaged in the
TEST position and the control power is available, the
motor will charge the closing springs. Close the circuit
breaker. Attempt to engage the levering crank to begin
moving the circuit breaker to the CONNECT position.
It will first be noticed that the levering crank cannot be
rotated with the breaker closed. The circuit breaker
must be OPEN in order to lever the breaker into the
structure.
Once in the CONNECT position, remove the levering
handle. Ensure that there is no spin-back of the
levering screw, or the breaker will not close (trip free).
Close the circuit breaker and the motor will begin
charging the closing springs if control power is
available.
Attempt to lever the circuit breaker toward the TEST
position. The levering screw should turn less than 1
turn and stop. Open the breaker and move it to the
TEST position.
Now move the circuit breaker to the DISCONNECT
position.
With the circuit breaker in the DISCONNECT
position charge the springs, using the maintenance
charging handle and close the breaker. Now charge
the springs once again. Next pull the shoot bolt
handles in, remove the circuit breaker. The circuit
breaker should open-close-open, discharging the
stored energy mechanism.
The suggested combination of interface checks
outlined in the circuit breaker manual and structural
assembly manual are intended to verify safe and
proper operation. If observed conditions are not as
described, contact Eaton for assistance.