Guideform Specifications
39
General specifications
Circuit breakers shall be individually mounted, drawout, low voltage
power circuit breakers. They shall meet the requirements of ANSI
C37.13, C37.16, C37.17, C37.50, and shall be listed and labeled to UL-
1066.
Circuit breakers shall be manually or electrically operated, with fea-
tures and accessories described in this specification. Breakers shall
have a maximum voltage rating of 635 Vac (600 Vac for integrally
fused breakers) and shall be rated to carry 100% of the current rating
of the breaker continuously. Breakers shall have minimum interrupt-
ing ratings as shown on the drawings.
Circuit breakers shall be metal frame construction. The interrupting
mechanism shall contain arc chutes constructed to suppress arcs and
cool vented gases. Interphase barriers of insulating material shall be
provided to isolate each pole of the breaker.
Circuit breakers shall have true 30 cycle withstand capability equal to
its short time interrupting rating to help assure selectivity with down-
stream devices and minimize nuisance tripping when closing into
high inrush loads. The breaker shall not use a hidden instantaneous
or making current release to achieve its short time withstand ratings.
Breakers shall contain a true two-step stored energy mechanism pro-
viding quick-make, quick-break operation capable of charging-after-
close operation. It shall be possible to discharge the closing springs
without closing the main contacts. Maximum closing time shall be 5
cycles at nominal control voltage.
Each breaker shall include a flush-mounted, retractable charging han-
dle and close / open pushbuttons. The manual charging handle shall
be able to be used to complete charging of an electrically operated
breaker in the event control power is lost during the charging opera-
tion. All manual control operators (charge / close / open) for the
breaker shall be accessible from the front of the breaker when it is
installed in a cubicle, with the cubicle door closed. Complete breaker
operating status shall be available at the front of the breaker.
Indicators in the breaker escutcheon shall provide closing spring sta-
tus (charge / discharge), breaker main contact status (open / closed)
and breaker drawout position (connect / test / disconnect). Each
breaker shall have standard padlocking provisions, on the front of the
breaker, to lock the breaker open and mechanically trip-free. The
padlock provision shall accept up to three padlocks with 1/4 to 3/8”
diameter shank.
The breaker trip unit shall be front mounted and shall allow full
access to all trip unit information including trip status, pickup and
delay settings, trip targets, and metering (where applicable) without
opening the breaker cubicle door. A removable, sealable cover shall
be provided over the trip unit to limit access to the trip unit. Trip set-
tings, metering information and trip target information shall be acces-
sible with the sealable cover installed. Trip unit settings cannot be
changed unless the sealable cover is removed.
Each drawout breaker shall have provisions for up to 72 dedicated
secondary disconnect points. All breaker control circuits as well as
inputs and outputs for the trip unit shall be wired through the sec-
ondary disconnects. Secondary disconnect points shall be self-aligning
and automatically couple with mating points in the breaker cubicle
when the breaker is in the “test” or “connect” position.
Circuit breakers shall employ a rejection system that will only allow
breakers of the correct ampere rating to be installed in the cubicle.
A breaker with a higher short circuit interrupting rating shall be
allowed to be mounted in the cubicle provided it has the same frame
rating. Integrally fused breakers shall not be allowed to be mounted
in a cubicle intended for an unfused breaker. Breakers shall be
equipped with a rugged guide bar that will ensure alignment of the
primary and secondary disconnects as the breaker is being racked
into the test and connect positions. Drawout breakers shall be
equipped with wheels that will allow the breaker to be rolled into
cubicle once it is installed on the drawout rails.
Standard mechanical interlocks shall be provided to prevent moving
the breaker from the connect, test, or disconnect position unless the
breaker main contacts are open. The breaker shall be prevented from
being closed during any racking operation and shall remain trip-free
except when it is in the test or connect positions. A mechanical inter-
lock shall discharge any energy stored in the closing springs before
the breaker can be withdrawn from its cubicle. A test position shall be
provided to permit operating the breaker while it is disconnected
from power circuit.
Detailed specifications
This specification covers GE WavePro™ low voltage power circuit
breakers, types WPS, WPH, WPX, WPF
The continuous current frame ratings shall be 800, 1600, 2000, 3200,
4000, 5000 amperes.
Circuit breakers shall be manually or electrically operated as shown
on the drawings.
Control voltage for electrically operated breakers shall be
___________volts <ac> <dc>
System voltage ______volts ac
<50> <60> Hz
3Ph <3W> <4W>
Circuit breaker RMS symmetrical interrupting rating __kA at ___volts
Circuit breakers shall be equipped with the following accessories:
• Auxiliary switch <3NO/3NC>, <6NO/6NC> contacts
• Shunt trip, voltage ________.
• 2nd shunt trip, voltage _______.
• Undervoltage release, voltage ________. <with time delay>
• Electric lockout device to disable manual closing, voltage
_________.
• Bell alarm <with> <without> lockout, two-SPDT contacts and
mechanical target, resettable from the front of the breaker
• Non-resettable operations counter
• Remote charge indicator contact (1-NO)
• “Hidden-on” (limited access) close button
• Sealable covers over TRIP/CLOSE push buttons
• Remote close accessory for manually operated breakers, voltage
_________.
• Circuit breakers equipped with non-communicating trip
units (Power+™ or MicroVersaTrip Plus™) shall be “power
management ready” to accept easy upgrade to
MicroVersaTrip PM™ trip unit without modifications to the
circuit breaker.
• A maintenance video tape shall be available for use as a
supplement to the breaker installation and maintenance
manuals. The video shall cover acceptance, installation and
operation of the breakers, safety features, accessory removal
and replacement, arc chute removal/replacement and contact
inspection and maintenance.
