34
SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System
Instruction Manual
Date Code 20210405
Device Installation
Setting the Unit ID
When configuring one or more SEL-RP50 Fault Repeaters to forward wireless
messages from a single SEL-FT50, the Unit ID settings must match.
In a typical three-phase SEL-FT50 installation, the Unit IDs are selected from
one of four Trios, as shown in
Table 4
. For example, if the Trio 1 grouping is cho-
sen, the SEL-FT50 Unit IDs would be set to 1, 2, and 3.
If one repeater site is added to this system, the three SEL-RP50s must also be
configured for Trio 1. Thus, the internal switches must be set so there is an
SEL-RP50 on each unit ID 1, 2, and 3. Additionally, each SEL-RP50 at this
repeater site must be mounted on the same electrical phase as the SEL-FT50 that
has the same Unit ID.
If a second repeater site is added to this system (that only has the Trio 1
SEL-FT50s), this second set of SEL-RP50s must also be configured to cover Unit
IDs 1, 2, and 3, and mounted on the same electrical phase as its Unit ID peer.
If more than one Trio of SEL-FT50s is installed, and SEL-RP50s are needed for
the other trios, they too must be set to Unit IDs that match the SEL-FT50 Unit
IDs, and mounted on the same electrical phase.
See
Appendix D: SEL-RP50 Fault Repeater Detailed Implementation on page 54
for more information on setting the Unit IDs for multiple SEL-RP50 Fault
Repeater sites.
Setting the Network ID
Configure your SEL-RP50 Fault Repeaters to communicate on the same network
as the SEL-FT50s and SEL-FR12 by making the same Network ID selection on
all devices. Devices with different Network IDs cannot communicate.
Setting the Repeater ID
The Repeater ID selection is a number between 1 and 5. The numeric sequence is
important when more than one repeater site is used for a particular Trio. For
example, when a Trio uses the maximum of five SEL-RP50 sites, the Repeater
IDs must increase from 1 (nearest the SEL-FT50) to 5 (nearest the SEL-FR12).
Figure 22
SEL-RP50 Switch Selections Labels
Repeater ID
SW1-SW3
1
Legacy
N/A-
N/A
5
4
3
2
*SW4-SW8 are unused
NOTE:
Do not install the SEL-RP50s
with a reversed Repeater ID sequence.
Misconfiguration will delay the
wireless message transmission and
add latency to the SEL-FR12 fault
indication. The Link status signals may
also take longer to appear after
feeder power is restored.
