Instruction Manual

35
Date Code 20210405 Instruction Manual SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System
Device Installation
If only one repeater site is installed for a Trio, any repeater ID can be used. A
smaller value provides the lowest latency, so using repeater ID = 1 keeps it
simple.
A special Repeater ID = Legacy is provided when using SEL-FT50s manufac-
tured before May 2021. These older SEL-FT50s are not compatible with the
numeric Repeater ID selections, and only one repeater site can be used. Do not
use the Legacy selection with newer SEL-FT50s.
Repeater IDs may be skipped, but cannot be reversed. For example, with three
repeater sites, working away from the SEL-FT50 towards the SEL-FR12, it is
permissible to use Repeater IDs 2, 4, and 5, but not 2, 5, 4.
See Appendix D: SEL-RP50 Fault Repeater Detailed Implementation on page 54
for more examples of settings the Repeater ID.
Do not use the Repeater ID switch configurations marked N/A.
SEL-FT50 and SEL-RP50 Field Installation
Physical Installation
Install the SEL-FT50 or SEL-RP50 on a distribution line by using an industry-
standard shotgun stick.
Step 1. Use a shotgun stick to grasp the hook eye on the side of the
SEL-FT50/SEL-RP50, and place the device on the line so that the
opening hangs over the line.
Step 2. Apply slight downward and sideways pressure until the device is
closed around the line.
The spring mechanism should be pushed in so that it wraps around
the line.
NOTE: Each SEL-RP50 repeater ID
adds approximately 1 ms latency to
the fault response at the SEL-FR12
Figure 23 Positioning the SEL-FT50/SEL-RP50