6
Instruction Booklet
IB182047EN
Effective February 2018
Arc flash limiter (AFL)
conversion system
EATON
www.eaton.com
•
Qualified field service technicians will install the VCP-TR breaker
and make all necessary wiring connections . Typically, the VCP-TR
breaker installation includes installing and mounting the breaker
to the new mounting brackets/platform and modifying the existing
door, if necessary .
If the existing door must be modified, the proper size opening will
be cut from the door and a new door escutcheon and gasket will
be installed to fit properly around the breaker when the door is
closed .
Figure 6. Typical VCP-TR breaker installed in the cell with the
door closed.
•
Qualified field service technicians will install a “snubber” (either a
standard Protec-Z or custom 3-phase assembly tuned specifically
to the installation) .
When a vacuum breaker is close coupled to a transformer, it
can introduce high frequency transients into the system when
the breaker is opened or closed . To negate the high frequency
transients, Eaton provides a “snubber” with each AFL conversion
system .
If a custom tuned snubber is supplied with the AFL conversion
system, it was designed based on the results of the optional
study of the customer’s existing original electrical system
performed by Eaton PSE .
Figure 7. Typical custom snubber.
•
Qualified field service technicians will install the control unit
either on the enclosure door or mounted remotely based on the
customer’s preference .
If a remotely mounted control unit is selected, the control unit
should be no farther then 25 cable feet (7 .62 m) from the switch-
gear enclosure . If a greater distance is required, contact Eaton
PSE .
Figure 8. Typical control unit.
For more information on the control unit and its operation, refer to
“4 . AFL conversion system control unit” later in this document .
otee:
N
Control unit requires 120 Vac or Vdc power (optional 24 or 48 Vdc avail-
able) . Routing and supply of the control power is up to the customer .
otee:
N
If control power is not available at the facility, Eaton can supply a
control power transformer (CPT) at additional cost . A CPT can usually be
mounted in the switchgear enclosure, but if not, it can be mounted in another
local location .
•
Qualified field service technicians will install two new AFL conver-
sion system nameplates in prominent positions on the switchgear
enclosure of door . One label identifies the AFL assembly and the
other states the AFL electrical ratings .
