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Instructions for installation,
operation, and maintenance of type
VCP-W vacuum circuit breakers
2. Safe practices
2.1 Recommendations
Type VCP-W vacuum circuit breaker elements are equipped with high
speed, high energy operating mechanisms. They are designed with
several built-in interlocks and safety features to provide safe and
proper operating sequences.
m WARNING
TO PROTECT THE PERSONNEL ASSOCIATED WITH INSTALLATION,
OPERATION, AND MAINTENANCE OF THESE CIRCUIT BREAKER ELEMENTS,
THE FOLLOWING PRACTICES MUST BE FOLLOWED.
Only qualified persons as defined in section 6.2.1 and with
•
respect to the local electric code, who are familiar with the
installation and maintenance of medium voltage circuits and
equipment, should be permitted to work on these circuit breaker
elements.
Read these instructions carefully before attempting any installa-
•
tion, operation or maintenance of these breakers.
Always remove the breakers from the enclosure before perform-
•
ing any maintenance. Failure to do so could result in electrical
shock leading to death, severe personal injury, or property
damage.
BE EXTREMELY CAREFUL while the circuit breaker is on the
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extension rails. Use provided rail clamps to firmly hold the circuit
breaker on the extension rails while performing such activities
as charging, closing, and tripping. Carelessness could cause the
circuit breaker to fall from the rails resulting in personal injury to
those in the area.
Do not work on a closed breaker or a breaker with closing springs
•
charged. The closing spring should be discharged and the main
contacts open before working on the breaker. Failure to do so
could result in cutting or crushing injuries.
Do not use a circuit breaker by itself as the sole means of
•
isolating a high voltage circuit. Remove the breaker to the
DISCONNECT position and follow good lockout and tagging rules,
as well as all applicable codes, regulations, and work rules.
Do not leave the breaker in an intermediate position in the cell.
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Always have the breaker either in the TEST or CONNECTED
position. Failure to do so could result in a flash over and possible
death, personal injury, or property damage.
Always remove the maintenance tool from the breaker after charg-
•
ing the closing springs.
Breakers are equipped with safety interlocks. Do not defeat
•
them. This may result in death, bodily injury, or equipment
damage.
Instruction Booklet IB131006EN
3. Receiving, handling, and storage
3.1 General
Type VCP-W vacuum circuit breaker elements are subjected to
complete factory production tests and inspection before being
packed. They are shipped in packages designed to provide
maximum protection to the equipment during shipment and storage
and at the same time to provide convenient handling. Tools, such as
the maintenance tool, are shipped separately.
3.2 Receiving
If the circuit breaker element is not to be used immediately but is
to be placed in storage, maximum protection can be obtained by
keeping it packed as shipped.
Upon receipt of the equipment, inspect the containers for any signs
of damage or rough handling. Open the containers carefully to avoid
any damage to the contents. Use a nail puller rather than a crow bar
when required. When opening the containers, be careful to save
any loose items or hardware that may be otherwise discarded with
the packing material. Check the contents of each package against
the packing list.
Examine the circuit breaker element for any signs of shipping
damage such as broken, missing, or loose hardware, damaged or
deformed insulation, and other components. File claims immedi-
ately with the carrier if damage or loss is detected and notify the
nearest Eaton office.
3.3 Handling
m CAUTION
DO NOT USE ANY LIFTING DEVICE AS A PLATFORM FOR PERFORMING
MAINTENANCE, REPAIR, OR ADJUSTMENT OF THE BREAKER OR FOR
OPENING, CLOSING THE CONTACTS OR CHARGING THE SPRINGS. THE
CIRCUIT BREAKER ELEMENT MAY SLIP OR FALL CAUSING SEVERE
PERSONAL INJURY. ALWAYS PERFORM MAINTENANCE, REPAIR, AND
ADJUSTMENTS ON A SOLID WORK SURFACE CAPABLE OF SUPPORTING
THE BREAKER ELEMENT.
When a breaker element is ready for installation, a lifting yoke in
conjunction with an overhead lifter or portable floor lifter can be used
to move a breaker element. When a breaker element is to be lifted,
position the lifting yoke over the breaker element and insert lifters
into the breaker element side openings with the lifting hole toward
the interrupters. Once the lifting yoke is securely seated in the
holes, the breaker element can be carefully lifted and moved. Also,
a breaker lift pan in conjunction with the portable floor lifter can be
used to create a breaker lifter. The breaker can be placed or rolled
onto the lift pan with the conductors arms pointing away from the
lifter (see IB022015EN for more details).
3.4 Storage
If the circuit breaker element is to be placed in storage, maximum
protection can be obtained by keeping it packed as shipped. Before
placing it in storage, checks should be made to make sure that the
breaker element is free from shipping damage and is in satisfactory
operating condition.
The circuit breaker element is shipped with its contacts open and
closing springs discharged. The indicators on the front panel should
confirm this. Insert the maintenance tool in the manual charge
socket opening (Figure 5). Charge the closing springs by pumping
the handle up and down approximately 38 times until a crisp metallic
"click" is heard. This indicates that the closing springs are charged
and is shown by the closing spring "charged" (yellow) indicator.
Remove the maintenance tool. Operate the push-to-close button.
The breaker element will close as shown by the breaker contacts
"closed" (red) indicator. Operate the push-to-open button. The
breaker element will trip as shown by the breaker contacts "open"
(green) indicator. After completing this initial check, leave the closing
springs "discharged" and breaker contacts "open" .
Effective March 2019
EATON www.eaton.com
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