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Sel -FT50 Manual

Sel -FT50 Manual

Fault transmitter and receiver system
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Accelerate Tripping, Speed Up Restoration,
Instruction Manual
SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System
and Improve Safety on Distribution Feeders
Major Features and Benefits
The SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System speeds up distribution-protection schemes by
detecting and transmitting distribution feeder fault information to recloser controls or relays. Install the SEL-FT50
Fault Transmitters on laterals, branches, and the main line to broadcast fault status to one or more SEL-FR12 Fault
Receivers. The SEL-FR12 communicates the fault data through M
recloser control within 6 ms.
Real-Time Distribution Fault Detection. Identify the faulted line segment with fault detection and low-
➤
latency communication while a fault is still active; for use in protection schemes.
Enhanced Protection. Make real-time changes to the protection strategy based on information from the faulted
➤
distribution-line segment.
Improved Selectivity. Trip a main feeder or branch recloser only when necessary. Avoid unnecessary entire-
➤
feeder outages.
Customized Reclosing Strategies. Block or enable reclosing for specific line segments.
➤
Improved Power Quality, Reduced System Stress, Limited Equipment Damage, and Enhanced Safety.
➤
Leverage faulted feeder status to better coordinate between protective elements, leading to faster trip times.
Easy Operation. Configure the fault transmitters and receiver without additional software.
➤
SEL-RP50 Fault Repeaters facilitate SEL-FT50 installations in locations where line-of-sight might be
➤
obscured by terrain, trees, or buildings.
No Batteries. Power the SEL-FT50 and SEL-RP50 directly from line current.
➤
Date Code 20210405
SEL-FT50/SEL-FR12
Fault Transmitter and Receiver System
SEL-RP50 not available in all regions
Instruction Manual
need new photo
®
B
communications to a relay or
IRRORED
ITS
SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System

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Summary of Contents for Sel SEL-FT50

  • Page 1 The SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System speeds up distribution-protection schemes by detecting and transmitting distribution feeder fault information to recloser controls or relays. Install the SEL-FT50 Fault Transmitters on laterals, branches, and the main line to broadcast fault status to one or more SEL-FR12 Fault ®...
  • Page 2 Functional Overview Easy Installation. Install the SEL-FT50 and SEL-RP50 on live lines by using familiar line tools and ➤ techniques. Flexible Integration. Install the SEL-FT50/SEL-FR12 system in an existing relay protection system. ➤ Functional Overview Figure 1 SEL-FT50, SEL-RP50, and SEL-FR12 System Overview...
  • Page 3 38 kV. The SEL-FR12 is mounted in a recloser control cabinet or in a substation control house. When one or more SEL-FT50 Fault Transmitters detect a fault, they send a wire- less signal to the SEL-FR12. The SEL-FR12 transfers the received signal to the recloser control or relay via M communications in as little as 6 ms.
  • Page 4 System Overview System Overview Figure 2 provides an overview of the SEL-FT50/SEL-FR12 system and illus- trates how to apply it across a distribution power system. Figure 2 SEL-FT50/SEL-FR12 System -- need updated drawing The SEL-FT50/SEL-FR12 system components are easy to use, and they contain many powerful and innovative features.
  • Page 5 SEL-FT50 and the SEL-FR12. The SEL-RP50 receives fault and link be installed in groups of three. Up to five SEL-RP50 (sites) may be used for each messages, modifies the message by SEL-FT50 with appropriate Repeater ID selections. See Technical Support on attaching identifier and diagnostic page 57 for details and examples on SEL-RP50 deployment.
  • Page 6 The SEL-FR12 collects wireless signals simultaneously from as many as 12 SEL-FT50 Fault Transmitters (enough for 4 three-phase installations). The SEL-FR12 reports faults to a relay or recloser control in less than 6 ms via . The SEL-FR12 HMI contains 29 LEDs and 1 pushbutton, as IRRORED shown in Figure 5.
  • Page 7 Figure 7 illustrates how this allows the recloser control to see faults on individual branches, including locations where it is not economically feasible to install a relay or recloser. Each SEL-FT50 label in Figure 7 represents three SEL-FT50 Fault Transmitters, one per phase.
  • Page 8 Each SEL-FT50 monitors line current and instantly transmits a wireless signal when an overcurrent (fault) condition occurs. The companion SEL-FR12 receives and aggregates fault data from as many as 12 SEL-FT50 Fault Transmitters. Upon detecting a fault indication signal, the SEL-FR12 communicates the fault...
  • Page 9 (see Figure 8). For a fault on the main line, the recloser control delays tripping unnecessarily because there is no fuse present. Date Code 20210405 Instruction Manual SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System...
  • Page 10 With this information, if a fault occurs on the unfused line section, the recloser control can trip instantaneously instead of waiting for the fuse delay. In Figure 10, the unfused tap is monitored by a set of SEL-FT50 Fault Transmit- ters (one for each phase), one SEL-FR12, and one SEL-651R. The SEL-FR12 is connected to the SEL-651R via a serial port.
  • Page 11 In this switchover scheme, the SEL-FT50/SEL-FR12 system is used to indicate which line section contains a fault. However, the fuse-saving scheme is the default operating mode. When the SEL-FT50 declares that a fault is present on a candidate line section, the scheme enables fuse-blowing while the fault is in progress.
  • Page 12 In Figure 12, each feeder (A through D) is equipped with SEL-FT50 transmitters. An example fault F1 on Feeder D triggers one or more of the SEL-FT50 transmit- ters to transmit. The SEL-FR12 receives the transmission and immediately sends the fault status to the bus relay.
  • Page 13 SEL-FR12 Figure 13 Radial Distribution Line With Multiple Reclosers Fix this problem by using an SEL-FT50/SEL-FR12 system. In Figure 13, the SEL-FT50 detects the fault and immediately transmits the information to the SEL-FR12, which then sends this information to the recloser control at R1.
  • Page 14 Safety Information Safety Information Regulatory Information DANGER The SEL-FT50 and SEL-RP50 are approved for use only with specific output power configurations that have been tested and approved. Changes or modifica- Install fault transmitters and sensors in accordance with tions to the SEL-FT50, SEL-RP50, SEL-FR12, or the antenna system, and the...
  • Page 15 Date Code 20210405 Instruction Manual SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System...
  • Page 16 SEL equipment for service. pour travailler avec ce type de composants, contacter SEL afin de retourner l’appareil pour un service en usine. Network Deployment Overview The deployment process for the SEL-FT50 and SEL-FR12 networks consists of the following three phases: Research ➤...
  • Page 17 Network Deployment Overview Research The first step in the deployment process is to identify possible installation sites for both the SEL-FR12 and SEL-FT50 devices, and then determine if a reliable link can be established. Short-Range Network A short-range network will have the SEL-FT50 devices deployed within a short distance of the SEL-FR12.
  • Page 18 Use the SEL-RP50 receive sensitivity and EIRP values listed in Specifications. If you do not have a clear line of sight between the SEL-FT50 and the SEL-FR12, you may wish to set up a repeater at a high point between the trans- mitter and the receiver, where the SEL-FR12 is at the repeater site along with an SEL-3031, which can be used as a backhaul device.
  • Page 19 SEL provides radio path studies for as many as five SEL-FT50 links at no cost. For larger studies, SEL offers this service, as well as link planning and testing, for a fee through SEL Engineering Services, Inc.
  • Page 20 When SEL-RP50s are part of the system, and the line current during commis- sioning is less than 40 A, the appearance of LINK status at the SEL-FR12 may be delayed by 30 minutes. When more than one SEL-RP50 site is installed this delay grows by up to 30 minutes per additional site.
  • Page 21 If possible, turn on the SEL-FR12 and verify that the ENABLED LED illuminates. Turn it off before continuing. Connect the Serial Port Use a short cable, such as the SEL-C272, to connect the serial output of the SEL-FR12 to the recloser control or relay serial port that has been configured for operation.
  • Page 22 To avoid water intrusion, seal all connections with coax sealing tape and ensure that the lowest point on the feed line is not a connector into which water could ingress. SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System Instruction Manual Date Code 20210405...
  • Page 23 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.
  • Page 24 Network ID to recognize that message. However, the broadcast radio frequency (channel) selection is controlled by the Unit ID set- ting in each SEL-FT50. The Network ID selection does not affect the radio chan- nel.
  • Page 25 The SEL-FR12 allows you to set the internal gain of the device. The device can be set to either Low Gain or High Gain for each trio of SEL-FT50 devices. The purpose of Low Gain mode is to ensure that you do not overdrive the receiver (which would decrease point link reliability).
  • Page 26 Appendix D: SEL-RP50 Fault Repeater Detailed Implementation on page 54. Figure 20 Trio Attenuation Switch Selection Receive Signal Strength Indicator The SEL-FR12 has a built-in feature to determine the link quality for each of its NOTE: The RSSI feature was 12 SEL-FT50/SEL-FR12 links called Receive Signal Strength Indicator (RSSI) introduced in March 2018.
  • Page 27 When the SEL-FR12 is receiving link messages, the RSSI indicated by the LINK LEDs updates every 15 seconds. If the SEL-FR12 misses a link message, the LINK LEDs that represent the RSSI will flash at the last measured value of a successful message.
  • Page 28 The TMB1–TMB6 entries in Table 9 and Table 10 indicate the required TMB states to select the Default Set or Command Set 2 or 3. Any other bit combina- tions force the SEL-FR12 to return all zeros and cause it to ignore TMB7 and TMB8 commands.
  • Page 29 SEL-FT50 Fault Transmitters that have not been installed or detected. For exam- ple, if SEL-FT50 Fault Transmitters with Unit IDs 4 and 5 are installed, but there is no Unit ID 6, LINK 6 never asserts. The equation for the Trio 2 LINK is reduced to LINK 4 AND LINK 5.
  • Page 30 Because the SEL-FR12 is set via control (DIP) switches on the rear of the device, NOTE: The SEL-FR12 automatically it may be difficult to read settings on the SEL-FR12 while it is installed in a cab- exits Read Settings mode after 30 minutes. To manually exit, press inet.
  • Page 31 To avoid collisions, select the Unit ID such that a single each SEL-FT50 transmits a Unit ID field as part of the message (the Unit ID is a fault is not likely to trip two SEL-FT50 number from 1 to 12).
  • Page 32 (e.g., recloser control) supervising the overcurrent pickup setting (expressed in primary amperes). Because the SEL-FT50 measurement accuracy is not as accurate as a relay, take care when choosing your fault pickup settings. The measurement accuracy for each trip threshold is spelled out in the specifications section.
  • Page 33 The SEL-RP50 retains some energy in storage and may take a couple of minutes to fully turn off. For an SEL-RP50 as part of the LINK to an SEL-FR12, the device is fully turned off when the LINK LED for that unit starts blinking.
  • Page 34 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.
  • Page 35 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.
  • Page 36 Step 3. Apply slight upward pressure until the device is secured around the line as shown in Figure 25. Figure 25 SEL-FT50/SEL-RP50 Secure on the Line Step 4. Use the shotgun stick to adjust the transmitter orientation so that it is directly vertical.
  • Page 37 SEL-FT50 5.58 [141.7] 4.49 [114.2] FRONT REAR RIGHT 6.97 [177.0] BOTTOM LEGEND [mm] i9373a Figure 26 SEL-FT50 Dimensions for FT50-0001/FT50-0003/FT50-0005/ FT50-0006 (U.S.A., Canada, Peru, Australia, New Zealand, and Brazil) Date Code 20210405 Instruction Manual SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System...
  • Page 38 Dimensions i9358a Figure 27 SEL-FT50 Dimensions for FT50-0004/FT50-0007 (Europe and Mexico) SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System Instruction Manual Date Code 20210405...
  • Page 39 Dimensions SEL-FT50 5.58 [141.7] 4.49 [114.2] FRONT RIGHT REAR 6.97 [177.0] BOTTOM LEGEND [mm] i9373a Figure 28 SEL-RP50 Dimensions for RP50-0001 (U.S.A., Canada) -- need updated drawing Date Code 20210405 Instruction Manual SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System...
  • Page 40 Dimensions Figure 29 SEL-FR12 Dimensions SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System Instruction Manual Date Code 20210405...
  • Page 41 6 ms typical, 16 ms maximum FT50-0004/FT50-0007: 7.6 mm to 27.9 mm (0.3 in to 1.1 in) From SEL-FT50 Sleep State: <100 ms for fault currents less than 400 A RP50-0001: 6.35 mm to 31.75 mm (0.25 in to <16 ms for fault currents greater than 1.25 in)
  • Page 42 As far as 0.8 km (0.5 miles) (line-of- sight) RP50-0001 to FR12-0001: As far as 0.8 km (0.5 miles) (line-of- sight) Communications Port EIA-232: One rear Port Data Rate Selections: 9600, 19200, 38400, 115200 bps SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System Instruction Manual Date Code 20210405...
  • Page 43 924.375 921.55 864.825 924.675 922.46 868.150 924.975 923.37 868.450 925.275 924.28 868.825 925.575 925.19 869.075 925.875 926.10 869.525 926.175 927.01 869.850 926.475 SEL-RP50 not available for Mexico and Brazil. Date Code 20210405 Instruction Manual SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System...
  • Page 44 ➤ 20190214 Updated Table 2: SEL-FR12 Orderable Antennas. ➤ 20181213 Updated SEL-FT50 graphics to show the revised upper housing and clamp and revised current transformer for ➤ FT50-0001/FT50-0003. Added Implement a Low-Cost Fast Bus-Tripping Scheme to Application Examples. ➤ Added FT50-0007 part number (new designation for Mexico).
  • Page 45 Added Appendix C: Link Budget Analysis. ➤ 20180308 Updated Table 2: SEL-FR12 Orderable Antennas. ➤ Added Caution note to Settings and Configuration in System Installation > SEL-FT50. ➤ Updated Compliance and Radio System in Specifications. ➤ Added EU to Table 13: Certifications by Country.
  • Page 46 Branch A is 200 A, and the load current of Branch B is 100 A. The 51 element pickup of the SEL-651R is set above 200 percent of the load current. In this example, the fuse size is 140 T, the SEL-651R 51 element pickup is 550 A, and the settings from Table 16 apply.
  • Page 47 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.
  • Page 48 Transmitted and Radiated Power Requirements FCC and IC regulations for 900 MHz ISM (industrial, scientific, and medical) band radios such as those used by the SEL-FT50 place limits of +30 dBm on maximum radio transmit power and +36 dBm on maximum Effective Isotropic Radiated Power (EIRP).
  • Page 49 The SEL-FR12 must be connected to an external antenna, but because the SEL-FR12 is not a transmitter, you may attach any size antenna to the device. Keep in mind that larger antennas will amplify the desired signal, but also inter- ference in the band.
  • Page 50 Fresnel zone, especially for longer links. You must keep in mind the above principles when planning your links. The best rule of thumb is that if you can see the SEL-FT50 from the SEL-FR12 antenna, the link is likely to work.
  • Page 51 Appendix C: Link Budget Analysis Antenna Polarization Loss While hanging on the line, the SEL-FT50 has a vertically polarized antenna. The SEL-FR12 should use a vertically polarized antenna to match. Antenna polariza- tion refers to the orientation of the e-field in the radiated RF signal. The omnidi- rectional antennas listed in Table 20 are all vertically polarized.
  • Page 52 Equation 7 Link Budget Calculation Example The SEL-FR12 antenna is mounted half-way up a utility pole and the SEL-FT50 is located 1.61 km (1 mi) away. There is approximately 40 percent obstruction within the Fresnel zone. There is also another 900 MHz radio nearby that has moderate interference.
  • Page 53 Link Margin (dB) = 6.7 (dB) A link margin of 6.7 dB is likely to provide insufficient coverage for this applica- tion. Consider increasing the SEL-FR12 antenna gain, and changing the location of the SEL-FT50 to avoid obstructions. Date Code 20210405...
  • Page 54 SEL-FR12 antenna. The other SEL-FT50 Trio (lower right part of diagram) is obscured by terrain, and there is no line-of-sight path. A set of three SEL-RP50s installed on the same branch in a location with a good line-of-sight to both the SEL-FT50s and the SEL-FR12 antenna will enable the signals from this SEL-FT50 trio to get around the obstacle.
  • Page 55 Figure 34 Selection of Unit ID, Net ID, and Repeater ID Figure 35 shows a feeder one-line diagram on a plan view of an idealized geo- graphic area. There are 4 SEL-FT50 Trios, but three of them do not have line-of- sight back the SEL-FR12 antenna.
  • Page 56 SEL-FT50 with shared unit ID, it will not experience the same load and fault current. If the SEL-RP50 is in the Off State or Sleep State, it will not be able to wake up to hear receive any fault messages. This is why it is important to install the SEL-RP50s on the same phase as the SEL-FT50 (with matching Unit ID).
  • Page 57 Technical Support Link Message repeating: When a feeder is powered up to a low load condition, the SEL-RP50 ➤ wireless repeaters are in a sleep state and do not continually operate. In this state they periodically turn on the radio to listen for Link sig- nals, and then go back to sleep to save energy.
  • Page 58 2350 NE Hopkins Court • Pullman, WA 99163-5603 U.S.A. trademark of their respective holders. No SEL trademarks may be used without written Tel: +1.509.332.1890 • Fax: +1.509.332.7990 permission. SEL products appearing in this document may be covered by U.S. and For- selinc.com • info@selinc.com eign patents.

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