Fans and Fan Controller
(WP-50)
The WP-50 breaker is provided with integrally mounted
cooling fans. Fan control is initiated by the trip unit which
signals a fan controller to turn the fans on and off when the
load current exceeds or drops below 4200 amperes. The fan
motors require 120Vac and the fan controller requires
24Vdc auxiliary power. Both the fans and the fan controller
are wired to the breaker secondary disconnect. The 24Vdc
source can be the POWER LEADER™ power supply used for
MicroVersaTrip PM™ trip units. 120Vac is normally provided
by the switchgear control power transformer. Power require-
ment for each fan is 0.2amps @ 120Vac (two fans installed).
Hidden-On Button and Push Button Covers
(Field installable kit available)
All electrically operated WavePro breakers are
provided with a manual close button on the
escutcheon. For applications where manual
closing is not desirable, the Hidden-On close
button can replace the standard manual close button. This
feature provides limited access to the mechanical close
mechanism. For emergency or supervised operation, a
0.100” diameter rod can be inserted through a hole in the
Hidden-On button to manually close the breaker. The
Hidden-On feature provides double insulation between the
operator and any live parts in the breaker. This feature is typ-
ically used on a breaker that is electrically interlocked with
other breakers, such as in an automatic transfer scheme.
Sealable covers can be provided for the CLOSE and OPEN
buttons on the breaker escutcheon. These covers help pre-
vent accidental manual operation of the circuit breaker.
Applications include supply breakers for fire pumps (to pre-
vent access to the OPEN button) or critical feeders where
accidental operation may have a serious impact on a
process. The push button covers can be applied to either
the CLOSE or OPEN buttons or both.
Table 8.1 Field installable kit catalog numbers
Lifting Tool
The lifting tool is the interface between
the breaker and the overhead breaker
lifting device or any other portable lift-
ing means that may be used for
installing and removing the WavePro draw-
out breakers. It attaches to the breaker to
provide stability when lifting the breaker from its drawout
rails. Pickup points on the breaker and lifting tool are
WP-08 / 16 / 20 / 32 / 40 / 50
Hidden-On Button
Sealable Push Button Covers (Qty 2)
WPHIDONKIT1
WPPBCVRKIT2
designed for center-of-gravity lifting so that the breaker is not
subject to excess movement when removed from the cubicle.
Table 8.2 WavePro Breaker Lifting Tools
OEM Substructure
All WavePro drawout circuit breakers are
integrated into switchgear or switchboard
equipment by way of a substructure. The
substructure includes the drawout rails, pri-
mary disconnects, and breaker rating rejec-
tion plate. Options for the substructure include shutters,
secondary disconnects, key interlocks, position switch, cur-
rent transformers, door interlock, and rail padlocking. For
detailed information (catalog numbers, dimensions, installa-
tion instructions) on substructures and accessories for OEM
applications, refer to the OEM handbook, DEB-011A Volume 3.
Open Fuse Lockout
(OFLO)
The open fuse lockout device is provided
with any fused breaker. The OFLO consists
of an individual trip solenoid for each pole,
connected directly across the fuse in that phase. When any
fuse blows, the solenoid is energized and trips the breaker to
prevent single-phasing. The breaker is mechanically locked
out and cannot be reclosed until the fuse is replaced and the
target indicator of the phase involved is reset.
When the fuses are mounted in a
separate fuse roll-out (used with
WPS-20, WPS-32, WPS-40, WPS-50)
the open fuse lockout is wired to
the fuses through secondary discon-
nects on the rollout and on the
breaker. The OFLO utilizes dedicated secondary disconnect
points, so no other breaker accessories are affected.
Operations Counter
(Field installable kit available)
The operations counter
mounts on the breaker
as a five-digit, non-resettable
counter actuated by the
breaker closing mechanism.
Table 8.3
Field Installable Operations Counter kit catalog numbers
WP-08 / 16 / 20
WP-32 / 40 / 50
WPCTRSFKIT1
WPCTRLFKIT1
Fuse Roll-out
Fuse Roll-out
WP-08 / 16 / 20
WP-32 / 40
WP-50
2000 / 3200 / 4000A
5000A
Lifting
0324B4551G001
0247B8961G001
0247B8961G003
0247B8961G004
0247B8961G005
Tool
8
Accessories for Drawout Breakers
(cont.)
