GE Industrial Solutions MicroVersaTrip Plus and MicroVersaTrip PM for Allis Chalmers, Siemens_Allis, and Siemens LA-600[F] and LA-1600[F] (Blue) - Manual (Page 3)

3
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 MicroVersaTrip
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 components.
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 previous trip unit provided long-
time instantaneous protection, 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 provides an
excellent opportunity to perform normal maintenance on the
breaker. Such procedures are described in the installation and
maintenance manuals 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 mechanisms. 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 possibility 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.