IB 6.2.11.1-1C
Page 3
ABB
INTRODUCTION
The KP-8 through KP-20 circuit breakers are low
voltage AC power circuit breakers featuring draw-out
construction and the MPSC-2000 microprocessor-
based trip system with RMS sensing. These circuit
breakers can be furnished with either electrically
operated (EO) or manually operated (MO)
mechanisms. On EO models, various control power
combinations are available, and numerous options are
available for both mechanism styles.
These instructions apply to the non-fused, ANSI-rated
“KP” series (KP-8, KP-16, KP-20), the non-fused
extended-rated “KPE” series(KPE-8, KPE-16, KPE-20),
and the fused “KDP” series(KDP-8 and KDP-16). Refer
to the Quick Reference section below for general
instructions on circuit breaker uncrating, inspection,
and installation.
Complete details on K-Line Plus features, operation,
and adjustments follow the Quick Reference section.
The circuit breaker continuous current rating (in
hundreds of amps) is given by the number which
follows the type designation (e.g., KP-8 = 800A). Some
of these breakers can be fitted with lower ampere
current sensors and trip systems, which provide
tripping below the actual continuous current rating of
the frame size.
Exceeding the continuous current rating of the circuit
breaker for extended periods may raise the
temperature of the circuit breaker beyond the limits set
forth in ANSI C37.13 thus affecting the life of the circuit
breaker insulating materials. The MPSC-2000 trip
system has a tolerance band on long time of minus
zero, plus ten percent (-0, +10%) which will allow the
circuit breaker to carry its rated continuous current but
will provide tripping above that value. Additionally, root
mean square (RMS) current calculation on the long
time trip element can provide tripping based on the true
heating value of the current passing through the circuit
breaker.
QUICK REFERENCE FOR UNCRATING,
INSPECTION, AND INSTALLATION
The following Quick Reference is provided to serve as
a checklist for uncrating, inspecting, and installing K-
Line Plus low voltage power circuit breakers. It is not
intended to provide all of the information necessary to
describe the features of the circuit breaker. That
information can be found in the later sections of this
instruction bulletin.
1. Inspect the circuit breakers immediately upon
receipt. Examine shipping cartons to determine if any
damage or loss was sustained during transit. When
such damage is evident, file a damage claim with the
carrier and notify your ABB sales office. ABB is not
responsible for damage of goods after delivery to the
carrier, but will assist when notified of claims. The
period of time after shipment that claims can be filed is
short so act immediately.
2. Uncrate carefully. Remove and retain these
instructions and other shipping papers. Remove
shipping brackets and remove the breaker from the
pallet, supporting as needed, to prevent dropping.
Check the contents of each carton against the packing
list before discarding the packing material. Should
there be discrepancies, notify your ABB sales office
furnishing purchase order and carton number
information.
3. Install circuit breakers in their permanent location as
soon as possible. If the circuit breakers are not to be
placed in service for some time, it is necessary that
adequate means of protection be provided. This may
be done by keeping the circuit breaker in its original
shipping carton in an upright position and storing
indoors in warm (approximately 15°C), dry (50% max.
humidity) and uncontaminated atmosphere. Standard
domestic packaging is not suitable for outdoor storage.
If the circuit breaker cannot be stored properly due to
abnormal circumstances, it must be thoroughly
inspected and repaired as necessary before placing in
service to insure that it is without damage and
uncontaminated. Failure to properly store the circuit
breaker may void the warranty and lead to extensive
refurbishing.
4. Inspect and/or check calibration after uncrating when
site procedures require. It will be necessary to rack the
circuit breaker to the TEST or CONNECTED position
before the breaker can be closed. Springs must be
charged on EO models using the proper control power
applied to secondary disconnect points (A1) and (A7)
or by using maintenance handle 716648-A00. Manual
close and trip operators on the front escutcheon can be
used to operate the breaker.
5. Rack the circuit breaker using crank 711706-K03 to
the fully DISCONNECTED position (fully counter-
clockwise). This will position the racking cams properly
to engage cubicle.
6. Match the circuit breaker to its switchgear cubicle.
Interference blocking is provided to prevent inserting
breakers of differing current ratings or short circuit
capabilities into cubicles for which they are not
intended.
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