Eaton W-VAC Series, Instructions For Installation, Operation And Maintenance

Instruction Book

Page 43

IB131009EN 

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 per- 

formed on the VCP-W, VCP-WR, VCPW-ND, DHP-VR, W- 
VACR, W-VAC, and W-VACW lines of vacuum circuit 
breakers Refer to Table 

6.3 

for a list of circuit breakers.  If 

the CloSure

TM   

travel  obtained is as specified, the mecha- 

nism performance is satisfactory.  If the CloSure

TM   

travel 

does not conform as shown in Figure 

6-15

, contact 

Eaton 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 CIR- 
CUIT 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 experience and judgment, but 
should not be considered to be all-inclusive or cov- 
ering every application or circumstance which may 
arise.  If further information is required, you should 
consult Eaton. 

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 proce- 
dure to perform the CloSure

TM 

Test. For further instruc- 

tions on 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 INDI- 
CATES 

“Discharged” 

AND THE MAIN CONTACT 

INDICATOR SHOWS 

“Open” 

(Figure 

6-9

). 

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 Figures 

6-9, 6-10 

and 

6-11

). 

Step 5 - 

Mount the transparent CloSure

TM  

Test Tool with 

two bolts and washers.  Refer to Figures 

6-22, 6-23 

and 

Table 

6.3 

for appropriate mounting holes

. 

Hand tighten 

the bolts (Figures 

6-12, 6-13, 6-22 

and 

6-23

). 

Step 6 - 

A Sanford

® 

Sharpie

® 

black fine point perma- 

nent marker, item no. 30001, is recommended for this 
next step. Place the marker tip in the proper hole (

“C”

). 

Refer to Figure 

6-22 

and make a heavy mark on the 

tape as shown in Figure 

6-15

. 

Step 7 - 

Charge the closing springs with the mainte- 

nance tool.  Continue charging the closing springs 
until a “click” is heard and the status indicator shows 

“Charged” 

(Figure 

6-14

). 

Step 8 - 

While holding the marker tip on the tape, close 

the breaker (Figure 

6-15

). 

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 

6-16, 6-22 

and 

6-18

). 

Step 10 - 

Remove the marker from hole 

“C”

. 

Step 11 - 

Push the “push to open” clapper to open the 

circuit breaker. 

Step 12 - 

Inspect the circuit breaker to assure it is in the 

open position and the closing springs are discharged. 
Remove the transparent CloSure

TM 

Tool. Remove the 

tape from the cam and stick the tape on the front right 
side sheet of the circuit breaker.  Record the date of the 
test and the operations counter reading on the tape 
(Figures 

6-19 

and 

6-20 

and 

6-21

). 

Step 13 - 

Evaluate the CloSure

TM”  

performance by com- 

paring the test tape with the illustrations in Figure 

6-21

. 

If the marking is similar to 

6-21A 

measure the over trav- 

el “x”:  If “x” is greater than or equal to 0.6 inches, the 
circuit breaker performance is satisfactory. If “x” is less 
than 0.6 inches or if the marking is similar to 

6-21B 

or 

6-21C

, immediately contact your Eaton Rep. 

Step 14 - 

Remove the CloSure

TM 

Tool. Reassemble the 

front cover onto the circuit breaker. Return the circuit 
breaker to it’s original configuration and setup. 

WARNING