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GEH-203f)
delay contacts. They provide an advantage over relays with passing (non-maintained) contacts when applied
on three terminal transmission lines.
Figures 4 and 5 are typic,al external connection diagrams for the RPMllD and RPMllH relays when used
with GCX51 and GCY51 distance relays respectively. The RPM11A relay is identical to the RPM11D relay
except that it has a passing second zone contact. Thus Figures 4 and
5
also apply to the RPMIIA relay.
The RPM14A, RPM14B and RPM14D relays have continuously rated coil circuits. Aside from this they
are functionally equivalent to the RPM11A. RPM11H and RPM11D respectively. While the internal connections
of the RPM14A, RPM14B and RPM11D are somewhat different from the internal connections of the RPM11A, RPM11H
and RPMIID relays. the stud arrangements are such that these relays are electrically interchangeable. It
is possible to substitute anyone for the other using the same relay case by simply removing one relay
from its case and substituting the other. However. such a procedure is suggested only if these relays are
employed in a standard application such as illustrated in Figures 4 and 5. Note that if different internal
connections are visualized for the RPM14A. RPM14B and RPM14D relays. Figures 4 and 5 may be also used for
the external connections to these relays.
The RPM118, RPM11E and RPM11J are similar to each other except for the differences noted in Table 1.
These three types all have the same internal connec.tions. which are somewhat different from the internal
conn~ctions
of the RPM11A, RPMIID and RPMIIH relays.
It is in this sense only that they are somewhat
special. They are included in this book without any application guide Because they are available and may
suit the needs of
someone-~aving
a special relaying problem.
None of the relays covered by these instructions contain seal-in units. The seal-in units of the
associated distance relays are used to seal-in around the RPM contacts.
OPERATING CHARACTERISTICS
THREE SECOND RELAYS
The minimum time setting of these relays is 0.15 seconds. The minimum difference in time between the
TU2 and the TU3 contact settings is between 0.084-0.117 second. The average dwell time at 0.75 second set-
ting is 0.15 second. At the three second setting the average d\'/ell time is 0.25 second.
ONE SECOND RELAYS
The minimum time setting for these relays is six cycles (60-cycle basis). The minimum difference in
time between the TU2 and TU3 contact settings is two-four cycles. The average dwell time at the 15 cycle
setting is three cycles and at the 60-cycle setting is 4.5 cycles.
TX UNIT
The pickup time of the TX unit with rated voltage applied is approximately two cycles on a 60-cycle
basis. Pickup time is the time from the instant voltage is applied to the instant a normally closed con-
tact opens.
RATINGS
The RPI111A. RPM1l8, RPMllD, RPMllE. RPMllH and RPMllJ relays are available for intermittent (60
seconds) rating at standard DC control voltages from 24 to 250 volts. The RPMI4A, RPM148 and RPM14D
relays are continuously rated at standard DC control voltages from 24 to 250 volts.
TARGET RATINGS - AMPERES
RATING
CONT.
TRIP DUTY
RES. OHMS
0.2
0.5
5
7.360
0.6
1.5
20
0.73
1.0
2.5
30
0.346
2.0
4.0
30
0.120
4.0
8.0
30
0.020
4
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