57
Instruction Booklet
IB131006EN
Effective March 2019
Instructions for installation,
operation, and maintenance of type
VCP-W vacuum circuit breakers
EATON
www.eaton.com
13. Evaluate the CloSure performance by comparing the test tape
with the illustrations in Figure 41. If the marking is similar to
42, detail A, measure the over travel “x”. If “x” is greater than
or equal to 0.6 in. (15.2 mm), the circuit breaker performance
is satisfactory. If “x” is less than 0.6 in. (15.2 mm) or if the
marking is similar to 42, detail B or 42, detail C, immediately
contact the Product Integrity Center for Technical Support at
(412) 787-6518.
14. Remove the CloSure tool. Reassemble the front cover onto the
circuit breaker. Return the circuit breaker to its original configura-
tion and setup.
6.11 Mechanism lubrication
For breakers built prior to 01/01/18
All parts that require lubrication have been lubricated during the
assembly with molybdenum disulfide grease (Eaton Material No.
53701 QB) which is no longer available. Over a period of time,
this lubricant may be pushed out of the way or degrade. Proper
lubrication at regular intervals is essential for maintaining the reliable
performance of the mechanism. Once a year or every 500 opera-
tions whichever comes first, the circuit breaker should be lubricated,
as shown in Figure 24, with a drop of mineral oil.
Table 26. Closure tool mounting/testing locations by circuit
breaker type.
Breaker line
Approximate
mechanism
cabinet
width (inch)
Upper
mounting
hole
Lower
mounting
hole
Marker
placement
hole
DHP-VR
20
29
A1
A1
B2
B1
C2
C5
VCPW-ND
20/21
A1
B2
C2
VCP-W,
29
33
A1
A2
B2
B2
C5
C6
VCP-WR
18
20
29
A1
A1
A1
B2
B2
B2
C1
C2
C5
W-VAC,
W-VACR
18
25
33
A1
A1
A2
B2
B1
B2
C1
C4
C6
After lubrication, operate the circuit breaker several times manually
and electrically.
Roller bearings are used on the pole shaft, the cam shaft, the
main link, and the motor eccentric. These bearings are packed at
the factory with a top grade grease, as specified by code, which
normally should be effective for many years. They should not be
disturbed unless there is definite evidence of sluggishness, dirt, or
parts are dismantled for some reason.
If it becomes necessary to disassemble the mechanism, the bear-
ings and related parts should be thoroughly cleaned. Remove old
grease in a good grease solvent.
Do not use carbon tetrachloride.
They should then be washed in light machine oil until the cleaner is
removed. After the oil has been drawn off, the bearings should be
packed with Eaton’s synthetic grease.
Eaton’s synthetic grease can be mixed with the molybdenum disul-
fide grease with no side effects.
For breakers built after 1/1/2018
All parts that require lubrication have been lubricated during the
assembly with Eaton’s new synthetic grease. Over a period of time,
this lubricant may be pushed out of the way or degrade. Proper
lubrication at regular intervals is essential for maintaining the reliable
performance of the mechanism. Every 500 operations or 10 years
whichever comes first, the circuit breaker should be lubricated.
Roller bearings are used on the pole shaft, the cam shaft, the main
link, and the motor eccentric. These bearings are packed at the
factory with a top grade synthetic grease which will be effective for
10 years. They should not be disturbed.
If it becomes necessary to disassemble the mechanism, the bear-
ings and related parts should be thoroughly cleaned. Remove old
grease in a good grease solvent.
Do not use carbon tetrachloride.
They should then be washed in light machine oil until the cleaner is
removed. After the oil has been drawn off, the bearings should be
packed with Eaton’s synthetic grease.
6.12 Finger clusters and switchgear stab lubrication
The breaker finger clusters are shipped with a lubricating blue wax
applied from the factory and the switchgear stabs are shipped with a
lubricating blue wax applied from the factory. The blue wax is used
instead of grease lubrication purposes for the following reasons:
1. The blue wax has a higher melting point and a lower viscosity
point then grease. So the blue wax will stay on warm contact
surfaces instead of dripping off like some greases.
2. Dust particles are less likely to stick to blue wax as opposed to
grease. Dirty grease can be a poor conductor.
3. The blue additive is added by Eaton to provide the ability to
perform visual checks of the breaker finger cluster engagement
on the switchgear stabs.
The breaker should never be levered into the cell when the blue wax
has been removed from the breaker finger clusters or the switchgear
stabs.
When routine maintenance is performed on the breaker or switch-
gear, the blue wax can be reapplied under de-energized conditions.
The blue wax can be purchased from Eaton by ordering material
code number 83342CE.
6.13 Main contacts to switchgear primary engagement
When the circuit breaker is in the complete and fully connected
position, the circuit breaker main contacts should be engaged on the
flat portion of the stationary primary contacts and not on the leading
radius.
6.14 How to determine the manufacturing date
The date code is located in the serial number - see the example:
Serial no. X X X X X X X XX
The first four characters provide the date information. The first two
characters are the year and the next two characters are the month.
The last five characters are the production unit identifier.
