For more information visit: www.EatonElectrical.com
Instructions for VR-Series
Replacement Breakers for
Westinghouse Type B20B/B22B
IB01301018E
I.B. 94A1994R01
Page 30
Effective: April 2005
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Figure 6-6 Status Indicators (“A” shows the contact status
indication and “B” shows the spring indication.)
Figure 6-7 Wrapping Tape Around Cam
the closing mechanism of the circuit breaker. If this load is
excessive, it can prevent the circuit breaker from closing fully. In
such a case, it is important to determine that the circuit breaker will
close fully. The CloSure
TM
Test provides this assurance.
General Information: The CloSure
TM
Test can be performed on the
VCP-W, VCP-WR, VCPW-ND, DHP-VR, W-VACR, and W-VAC lines
of vacuum circuit breakers. Refer to Table 6-4 for a list of circuit
breakers. If the CloSure
TM
travel obtained is as specified, the
mechanism performance is satisfactory. If the CloSure
TM
travel does
not conform as shown in Figure 6-16, contact Eaton’s Electrical
Services & Systems for further information. (See Step 13).
DO NOT ATTEMPT TO INSTALL OR PERFORM MAINTENANCE
OR TESTS ON THE EQUIPMENT WHILE IT IS ENERGIZED.
NEVER PUT YOUR HANDS NEAR THE MECHANISM WHEN THE
CIRCUIT BREAKER IS IN THE CHARGED OR CLOSED POSITION.
DEATH OR SEVERE PERSONAL INJURY CAN RESULT FROM
CONTACT WITH ENERGIZED EQUIPMENT. ALWAYS VERIFY THAT
NO VOLTAGE IS PRESENT BEFORE PROCEEDING WITH THE
TASK, AND ALWAYS FOLLOW GENERALLY ACCEPTED SAFETY
PROCEDURES.
Safety Precautions: Read and understand these instructions
before attempting any maintenance, repair or testing on the breaker.
The user is cautioned to observe all recommendations, warnings
and cautions relating to the safety of personnel and equipment.
The recommendations and information contained herein are based
on Eaton Electrical experience and judgment, but should not be
considered to be all-inclusive or covering every application or
circumstance which may arise. If further information is required,
you should consult Eaton’s Electrical Services & Systems.
Testing Procedures: Assuming that the breaker is safely pulled out
to the Test/Disconnect position in the enclosure or placed on the
workbench, follow this procedure to perform the CloSure
TM
Test. For
further instructions on the disconnecting the circuit breaker consult
section 4 of this manual. If the enclosure is equipped with the MOC
operating in the test position also, make certain that the MOC is
connected to operate.
Step 1 - On the front cover identify the status indicators. Make
sure the closing spring status indicates “DISCHARGED” and
the main contact indicator shows “OPEN” (Figure 6-6).
Step 2 - Remove the circuit breaker front cover. Be sure to save
the original fasteners for reassembly.
Step 3 - Cut a piece of one inch wide drafting/masking tape
approximately 8 to 10 inches long.
Step 4 - Place the tape around the cam starting from the bottom
up. Make certain that the tape adheres well to the cam surface.
(See Figure 6-7).
Step 5 - Mount the transparent CloSure
TM
Test Tool with two bolts
and washers. Refer to Figure 6-8 and Table 6.2 for appropriate
mounting holes. Hand tighten the bolts (Figure 6-8).
Step 6 - A Sanford
®
Sharpie
®
black fine point permanent marker,
item no. 30001, is recommended for this next step. Place the
marker tip in the proper hole (“C”). Make a heavy mark on the tape
as shown in Figure 6-10.
Step 7 - Charge the closing springs with the maintenance tool.
Continue charging the closing springs until a “click” is heard and the
status indicator shows “CHARGED” (Figure 6-9).
Step 8 - While holding the marker tip on the tape, close the breaker
(Figure 6-11).
Step 9 - Move the marker back and forth horizontally approximately
15
o
in both directions to create a line on the tape that identifies the
closed rest position (Figures 6-12 and 6-13).
Step 10 - Remove the marker from hole “C”.
WARNING
