GE AKR-30 Series Maintenance Manual page 150

SECTION 1 3-RMS-9
The RMS-9/Epic M ic roVersaTri p® is a solid-state, d i ­
rect-acting, self-powered t r i p device system. The RMS-9
system consists of the RMS-9 programmer, current sen­
sors, and a flux shifter tri p device. Fig. 97 shows a b lock
d iagram of the system .
1 3.1 PROGRAMMER U N IT
Fig. 98 shows a typical RMS-9/Epic M icroVersaTrip®
programmer unit. Like the MicroVersaTri p®, the RMS-9
Epic MicroVersaTri p® provides the comparison basis for
overcurrent detection and del ivers the energy necessary
to trip the breaker. It contains a programmable m icro­
electronic processor which incorporates nine adjustable
time-current functions, three mechanical fault indicators
(local and remote) , a long-time picku p LED ind icator (local
and remote) and a ,zon e selective interlocking function. All
adjustable programmer fu nctions are automatic and self­
contained req u i ring no external relaying, power supply or
accessories. See Table 1 5 for trip functions available and
Table 1 6 for trip function characteristics.
d escri ption of each trip fu nction is given i n publi cation
GEK97367.
XFMR
N
08
SWITCH
FIG. 97 - R MS-9 BLOCK DIAGRAM
70
&
E p ic MicroVersaTri p ®
A detailed
flp
TO
FLUX
SHIFTER
1 3.1 .1 FAULT TRIP INDICATORS
The optional fault tri p indicators are similar to the
MicroVersaTrip® indicators. They are mechanical pop­
out type for i d entify i n g overload o r s h o rt c i rc u i t
over-currents faults when breakers are ordered without
integral g round fault protection. They are also available to
i dentify overload , short circuit and g round fault trips for
breakers supplied with i ntegral g round fault protection .
Each target pops out when its associated tri p 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 o peration of any trip element or prevent
the breaker from being closed .
98 -
FIG.
MICROVERSATRI P ® PROGRAMMER
RMS-9 & EPIC