Instruction Manual
Table Of Contents
- Major Features and Benefits
- Functional Overview
- System Overview
- Application Examples
- Collect Fault Information From Remote Branches
- Improve Fuse Coordination
- Fuse-Blowing Scheme Shortcomings
- Improve Fuse-Blowing Schemes With the Fault Transmitter and Receiver System
- Fuse-Saving Combined With Fuse-Blowing Schemes
- Improve Feeder Cable First-Span Protection
- Implement a Low-Cost Fast Bus-Tripping Scheme
- Tripping the Right Recloser Faster
- Safety Information
- Network Deployment Overview
- Device Installation
- Dimensions
- Specifications
- Appendix A: Manual Versions
- Appendix B: Two-Branch Application
- Appendix C: Link Budget Analysis
- Appendix D: SEL-RP50 Fault Repeater Detailed Implementation
- Technical Support
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Date Code 20210405 Instruction Manual SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System
Appendix B: Two-Branch Application
With these settings, Branch B operates using a fuse-blowing scheme where the
fuse clears faults on the branch, while Branch A operates separately, tripping
much faster because the protection does not wait for a fuse-coordination delay.
The required modifications for the SEL-651R Protection settings are not included
in this instruction manual. See SEL application guide Using the SEL-FT50/
SEL-FR12 System to Selectively Permit Accelerated Tripping in the SEL-651R
Recloser (AG2017-30), available at selinc.com.
Table 17 Settings for the SEL-FR12
Network ID BAUD RX_ADD TX_ADD Trio 1 Gain Trio 2 Gain Trio 3 Gain Trio 4 Gain
3—(0010) 38400 1 2 High Gain High Gain High Gain High Gain
Ta b l e 1 8 SE L- 6 5 1 R Se tt i n g s
PROTO SPEED TXID RXID
MB8A or MB8B 38400 1 2
Ta b l e 1 9 SE L-65 1 R Tra ns m i t M IRRORED BITS Settings
TMB1A TMB2A TMB3A TMB4A TMB5A TMB6A TMB7A TMB8A Comments
0000000TRGTRThe TARGET RESET pushbutton of the
SEL-651R resets the latched FAULT
LEDs of the SEL-FR12.