GE AKR-30 Series Maintenance Manual page 248

SECTION 1 3-RMS-9
The RMS-9/Epic MicroVersaTri p® is a sol id-state, di­
rect-acting, self-powered tri p d evice system. The RMS-9
system consists of the RM S-9 programmer, cu rrent sen­
sors, and a flux shifter trip device. Fig. 97 shows a block
diag ram 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 tri p the breaker. It contai ns a programmable micro­
electronic processor which incorporates nine adjustable
time-cu rrent functions, three mechanical fault indicators
(local and remote), a long-time picku p LED indicator (local
and remote) and a, zone selective interlocking function. All
adj ustable programmer functions are automatic and self­
contained req ui ring no external relaying , power supply or
accessories. See Table 1 5 for trip functions available and
Table 1 6 for trip function characteristics.
description of each trip function is given in publ ication
GEK97367.
XFMR
N
FIG. 97 - RMS-9 BLOCK DIAGRAM
70
&
E p ic MicroVersaTri p ®
A detailed
SWITCH
1 3.1 .1 FAULT TRIP I N DICATORS
The optional fau lt trip indicators are similar to the
MicroVersaTri p® indicators. They are mechan ical pop­
out type for i d e ntify i n g overload or s h o rt c i rc u i t
over-currents faults when breakers are ordered without
i ntegral 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.
TO
+FLUX
SHIFTER
FIG.
MICROVERSATRIP® PROGRAMMER
98 -
RMS-9 & EPIC