23
Date Code 20210405
Instruction Manual
SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System
Device Installation
Antenna System Ground
Antenna system grounding is not included in the scope of this manual. Please
consult a radio systems engineer or other professional for advice on ground-sys-
tem design, and read SEL application guide
Radio System Lightning Protection
Best Practices
(AG2014-36), which can be found on the SEL website. A well-
designed system will minimize equipment damage and risk of electric shock to
personnel. SEL recommends that all installations include a properly grounded
external surge protector. SEL offers a Radio Surge Protector With N Female Con-
nectors (part number 200-2004) as an accessory to the SEL-FR12.
Commissioning the SEL-FR12
Setting Network ID
To enable multiple wireless fault transmitter and fault receiver systems to operate
in close proximity, both the SEL-FT50 and SEL-FR12 feature a Network ID
selection (1–16). See
Figure 17
for an example of two networks.
Each SEL-FT50 contain configuration switches to select one of 16 network iden-
tification numbers. The SEL-FR12 also has Network ID configuration switches
and will only accept received SEL-FT50 messages that have a matching Network
ID.
For example, if three distribution feeders emanate from one substation, each with
their own SEL-FT50/SEL-FR12 system, these systems operate independently if
they have unique Network IDs.
Once you have determined the Network ID to be used, set control switches to the
appropriate positions, as shown in
Figure 18
.
Figure 17
Two-Network Example
SEL-FR12
SEL-FR12
SEL-FT50
SEL-FT50
SEL-FT50
SEL-FT50
SEL-FT50
SEL-FT50
SEL-FT50
SEL-FT50
SEL-FT50
SEL-FT50
SEL-FT50
SEL-FT50
Network ID 01
Network ID 04
Network ID 01
Network ID 04
Unique Network IDs
isolate system operation
01
02
03
04
05
06
01
02
03
04
05
06
