13
Instructional Booklet
IB022010EN
Effective July 2019
Revision #4
Instructions for installation, operation,
and maintenance of medium voltage
VC-W MR2 (integral racking)
EATON
www.eaton.com
Figure 16. MR2 – arc auxiliary pan assembly.
1.
VC-W MR2 motor/controller assembly .
2.
Manual crank safety permissive switch: disables the motor if an
operator were to insert a manual tool to rack the circuit breaker .
3.
“Disconnect” limit switch: activated when the auxiliary drawer is
in the disconnected position .
4.
“Connect” limit switch: activated when the auxiliary drawer is in
the connected position .
5.
Limit switch actuator .
6.
Lev-in lead screw .
Sequence of operations
Below is the basic sequence of operations to use the integrated
racking system . The operation steps are the same for each of the
control options (Pendant, I/O, and Modbus) .
If the enable button is present (
button must be held to operate the pendant .
For breaker pan assemblies WITHOUT test position
1.
Insert the breaker into the breaker cell .
a.
The breaker is now in the disconnect position .
b.
The solid green disconnect LED will be illuminated .
2.
The operator should then manually pull the secondary plug to
apply control power to breaker .
a.
At this time the breaker open and close operations can be
tested electrically .
b.
To proceed further and rack the breaker to the connected
position, the breaker must be open .
1.
Arc gear – the compartment door must be closed
and latched .
2.
Non-arc gear – it is recommended to close the door but
not mandatory if door safety switch is not included .
3.
Press the connect button .
4.
The green disconnect LED will turn off and the intermediate
LED will flash as the breaker is in motion .
5.
Once the breaker reaches the connect position, the solid red
connect LED will illuminate .
a.
The breaker is now in the connect position and can
be energized .
6.
To rack the breaker out, the breaker must be open .
a.
If the breaker is not open and the operator tries to press
the disconnect button, the operator will receive an open
permissive error “E5” .
b.
The operator should then open the breaker .
c.
After the breaker is open, the error can be cleared by
pressing the disconnect button .
7.
Once the error is cleared, the disconnect button can be pressed .
a.
It is not necessary to hold the button down .
8.
The red connect LED will turn off and the intermediate LED will
flash as the breaker is in motion .
9.
Once the breaker reaches the disconnect position, the solid
green disconnect LED will illuminate .
10.
At this time the secondary plugs will be disconnected and there
will not be any power on the breaker .
