![background image](http://html1.mh-extra.com/html/eaton/vcp-w-series/vcp-w-series_instructions-for-installation-operation-maintenance-servicing_3927554035.webp)
35
Instruction Booklet
IB131006EN
Effective March 2019
Instructions for installation,
operation, and maintenance of type
VCP-W vacuum circuit breakers
EATON
www.eaton.com
Figure 16. Pulling secondary disconnect cage to engage second-
aries in TEST position (old version shown). New version will
have BPI pan with automatic secondaries.
Figure 17. Engaging levering-in crank.
Levering interlock
If the breaker is closed in the TEST position, then as the levering-in
crank is pushed in to gain access to the hex drive nut on the levering
system the breaker will trip Open automatically.
If the circuit breaker is closed as the levering-in crank is engaged to
move the circuit breaker from the CONNECTED to the TEST posi-
tion, the circuit breaker will do one of the following.
1.
BPI pan assembly (Figure 12):
If the breaker is closed in the
CONNECTED position, then as levering-in crank is pushed in
to gain access to the hex drive nut on the levering system the
breaker will trip Open automatically.
2.
Non-BPI pan assembly (Figure 13):
If the breaker is closed in
the CONNECTED position, then access to the hex drive nut on
the levering system will be denied when pushing in the levering-
in crank. The breaker must be opened prior to the levering
operation being performed.
Automatic/manual hybrid secondary (optional - Figure 46):
It
will function the same as the Non-BPI pan assembly above.
Positive Interlock
BPI pan assembly (Figure 12):
The “L” shaped slider interlock
that enables tripping of a closed breaker by pushing in on the
slider (item 6) that protects the racking screw. If desired, the
customer can request the “Z” bracket to be added to the BPI
pan assembly if the switchgear design permits it.
Non-BPI pan assembly (Figure 13):
The “Z” shaped slider
interlock that prevents a closed breaker from being levered out of
the cell.
Automatic/manual hybrid secondary (optional - Figure 46):
It
will function the same as the Non-BPI pan assembly above due
to the replacement of the “L” bracket with the “Z” bracket.
Negative interlock
The negative interlock prevents the circuit breaker from closing
between the CONNECTED and TEST positions.
Position closing interlock
The circuit breaker is prevented from closing automatically when it
is moved from the TEST to the CONNECTED position if the closing
switch is maintained during the levering-in operation.
Position withdrawal interlock
This interlock prevents the circuit breaker from being withdrawn by
pulling unless it is in the DISCONNECT or DISCONNECT/TEST posi-
tion.
Extension rail interlock
The extension rail interlock prevents the circuit breaker from being
withdrawn out of its compartment unless the extension rails or the
breaker lifter are properly engaged to the fixed rails, or the lower cell
is configured for a direct roll-in-breaker.
Overall system interlock check
The correct operation of provided interlocks should be confirmed.
Keep in mind that an interfacing check is made with a compatible
structure. As such, the instructions provided here may overlap
with the instructions provided with the assembly. In any case, all
provided interlocks should be confirmed. Review paragraph 4 8.1
before proceeding if additional instructions are needed on insertion
and removal of a circuit breaker.
At the conclusion of the operations check as described in paragraph
4.8.2, the circuit breaker was closed in the TEST position with its
springs charged. Perform one of the following depending on the
slider interlock (also called positive interlock) style.
BPI pan assembly:
Engage the levering-in crank and the circuit breaker will automatically
trip and the MOC switches will operate if the circuit breaker cell is
equipped with MOC switches designed to operate in the TEST posi-
tion.
Lever the circuit breaker towards the CONNECTED position. As
the circuit breaker moves, protective compartment shutters will
automatically begin to open uncovering fixed primary contacts.