GE Industrial Solutions MicroVersaTrip Plus and MicroVersaTrip PM AK-1-15, AK-1-25 - Manual (Page 4)

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SECTION 1. GENERAL INFORMATION
GE Conversion Kit installation is straightforward, but
does require careful workmanship and attention to
these instructions. Familiarity with the breaker is
highly desirable. The general approach is to first
remove the existing trip devices from the breaker,
then install the MicroVersaTrip Plus or MicroVersa-
Trip PM kit components. Following this procedure,
the converted breaker is performance tested before it
is returned to service.
The majority of trip unit kit installations do not
require any customized assembly work. However,
some conversions may involve unusual mounting
conditions or accessory combinations that require
minor modifications and/or relocation of compo-
nents. In most instances, this supplementary work
can be done on site.
In preparation for the conversion, the installer should
verify that the appropriate current sensors and trip
unit have been furnished. Whenever a ground-fault
trip element is installed on a breaker with a four-wire
system, an associated neutral sensor (CT) is required
for separate mounting in the equipment.
Ensure that retrofitted breakers are applied within
their short-circuit ratings. For example, if the previ-
ous trip unit provided long-time instantaneous pro-
tection, the short-time rating of the MicroVersaTrip
Plus or MicroVersaTrip PM Trip Unit will govern the
application.
As a service-related consideration, the installation of
a MicroVersaTrip Plus or MicroVersaTrip PM kit pro-
vides an excellent opportunity to perform normal
maintenance on the breaker. Such procedures are
described in the installation and maintenance manu-
als supplied with the breaker and equipment.
SECTION 2. BEFORE INSTALLATION
Before starting any work, turn off and lock out all
power sources leading to the breaker, both primary
and secondary. Remove the breaker to a clean, well-
lighted work area.
WARNING: Low-voltage power circuit breakers use
high-speed, stored-energy spring operating mecha-
nisms. The breakers and their enclosures contain
interlocks and safety features intended to provide
safe, proper operating sequences. For maximum
personnel protection during installation, operation,
and maintenance of these breakers, the following
procedures must be followed. Failure to follow
these procedures may result in personal injury or
property damage.
• Only qualified persons, as defined in the
National Electrical Code, who are familiar with
the installation and maintenance of low-voltage
power circuit breakers and switchgear
assemblies, should perform any work on these
breakers.
• Completely read and understand all instructions
before attempting any breaker installation,
operation, maintenance, or modification.
• Turn off and lock out the power source feeding
the breaker before attempting any installation,
maintenance, or modification. Follow all lock-
out and tag-out rules of the National Electrical
Code and all other applicable codes.
• Do not work on a closed breaker or a breaker
with the closing springs charged. Trip the
breaker OPEN and be sure the stored-energy
springs are discharged, thus removing the pos-
sibility that the breaker may trip open or the
closing springs discharge and cause injury.
• Trip the breaker OPEN, then remove the breaker
to a well-lighted work area before beginning
work.
• Do not perform any maintenance that includes
breaker charging, closing, tripping, or any other
function that could cause significant movement
of a draw-out breaker while it is on the draw-out
extension rails.
• Do not leave the breaker in an intermediate
position in the switchgear compartment. Always
leave it in the connected, test, or disconnected
position. Failure to do so could lead to improper
positioning of the breaker and flashback.
WARNING: Before installing the conversion kit, turn
the breaker OFF, disconnect it from all voltage
sources, and discharge the closing springs.