GE Industrial Solutions WavePro Low-Voltage Power Circuit Breakers - Manual (Page 9)

MicroVersaTrip Plus™ and MicroVersaTrip PM™ Trip Units
Chapter 1. Introduction
1
1-1 Product Desription
The MicroVersaTrip Plus™ and MicroVersaTrip PM™
Trip Units described in this publication are used on
WavePro™ low-voltage power circuit breakers. A front view
of the MicroVersaTrip Plus Trip Unit is shown in Figure 1.
The Trip Unit has a 50-pin rear connector that provides
the Trip Unit’s main connections to the circuit breaker
frame and to the equipment control signals.
There is a recessed connector in the front panel to accept
interchangeable current rating plugs.
Figure 1. Front view of a MicroVersaTrip Plus Trip Unit.
CAUTION: Removal of a Trip Unit from its breaker must
be performed with the breaker in the
OPEN or TRIPPED
position. Draw-out breakers should be racked out first.
ATTENTION: Pour retirer déclencheur, le disjoncteur
doit être en position ouverte ou déclenchée. Les
disjoncteurs débrochables doivent ètre en position
débrochée.
CAUTION: Do not attempt to operate the breaker without
its assigned Trip Unit. Installation of an incorrect Trip
Unit may result in unsafe operation of the breaker.
ATTENTION: Ne pas utiliser le disjoncteur sans son
déclencheur. Une mauvaise installation du déclencheur
peut être dangereuse.
CAUTION: Removal of the rating plug while the breaker
is carrying current reduces the breaker’s current-carrying
capacity to approximately 25% of the current sensor rat-
ing. This may result in undesired tripping.
ATTENTION: Si le calibreur est retiré alors que le
disjoncteur est sous tension, le déclencheur se régle
automatiquement à approximativement 25% du calibre
du transformateur de courant. Ceci peut entrainer un
déclenchement indésirable.
NOTE: Trip Units as received may have settings that are
undesirable for the specific application. Ensure that set-
tings are appropriately adjusted before energizing.
NOTE: Les disjoncteurs sont livrés avec des réglages
standards qui peuvent être inadéquates pour certaines
applications. Vérifier ces réglages avant de mettre le
disjoncteur sous tension.
1-2 Trip Unit Functions
MicroVersaTrip Plus and MicroVersaTrip PM Trip Units
have specific standard and optional functions. All Trip
Units share a series of interchangeable rating plugs. The
standard functions for both types of Trip Unit are as fol-
lows:
• Protection
– Long-time protection
– Instantaneous protection
• Status
– Trip target (trip type)
– Trip information (magnitude and phase)
– Trip operations counters
• Metering display
– Phase current (selectable among phases)
The optional functions available on both types of Trip
Unit are as follows:
• Short-time protection, with or without I
2
T
• Ground-fault protection, with or without I 2 T