SECTION 1 3-RMS-9
&
Epic MicroVersaTrip®
The RMS-9/Epic MicroVersaTrip® is a solid-state, di
rect-acting, self-powered trip device system. The RMS-9
system consists of the RMS-9 programmer, current sen
sors, and a flux shifter trip device. Fig. 97 shows a block
diag ram of the system.
1 3.1 PROGRAMMER UNIT
Fig. 98 shows a typical RMS-9/Epic M icroVersaTrip "'
programmer unit. Like the MicroVersaTrip®, the RMS-9
Epic MicroVersaTrip@ provides the comparison basis for
overcurrent detection and delivers the energy necessary
to trip the breaker. It contains a programmable micro
electronic processor which incorporates nine adjustable
time-current functions, three mechanical fault indicators
(local and remote), a long-time pickup LED indicator (local
and remote) and a, zone selective interlocking function. All
adjustable programmer functions are automatic and self
contained req uiring no external relaying , power supply or
accessories. See Table 1 5 for trip functions available and
Table 1 6 for trip function characteristics. A detailed
description of each trip function is given in publication
GEK97367.
70
XFMR
N
SWITCH
TO
+FLUX
SHIFTER
FIG. 97 - RMS-9 BLOCK DIAGRAM
1 3.1 .1 FAULT TRIP INDICATORS
The optional fault trip indicators are similar to the
MicroVersaTri p® indicators. They are mechanical pop
out type for identifying overload or short c i rcuit
over-currents faults when breakers are ordered without
integral g round fault protection. They are also available to
identify overload, short circuit and g round fault trips for
breakers supplied with integral ground fault protection.
Each target pops out when its associated trip element
operates to trip the breaker. After a trip, the popped target
must be reset by hand. However, neglecting to reset does
not affect normal operation of any trip element or prevent
the breaker from being closed.
FIG.
98 -
RMS-9 & EPIC
MICROVERSATRIP® PROGRAMMER
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