Four levels of phase instantaneous or definitetime elements are available for overcurrent. Sel751a feeder protection relay mhz electronics, inc. The sel751 feeder protection relay is ideal for directional overcurrent, fault location, arcflash detection, and highimpedance fault detection applications. Sel751a feeder protection relay major features and benefits the sel751a. When working on the relay with the front panel removed, work surfaces and personnel must be properly grounded or equipment damage may result. Sel 2bfr, 2bfr type sel 2bfr,2bfr breaker failure relay and monitor sel2bfr sel 151 type sel 151 phase overcurrent relay with voltage control. Sel 751feeder protection relaythe sel 751 is the right solution for industrial and utility feeder protection, with flexible io options, easy mounting, and f. Warranty all new schweitzer sel 751as come with the original manufacturers warranty.
Advanced communications integration with ethernet networks connect the sel 351 directly to a local network with the builtin ethernet interface or through an sel 3530 realtime. The p14x series of feeder protection relays, part of the micom p40 agile family of protection relays, provide an integrated solution for the complete protection, control and monitoring of overhead lines and underground cables. It is also available with a color touchscreen display. Express installation guide online library of manuals. If you are having trouble finding the instruction manual you are looking for then please reach out.
Sel 751 and sel 751a feeder protection relay improved safety reduce arcflash energy with fast detection and tripping. Instruction manual 20726 sel 710 relay motor protection relay instruction manual pm71001nb. Schweitzer engineering sel751a feeder protection relay. The sel751a feeder protection relay provides an excep. View online or download sel 751a instruction manual. Sel751a feeder protection relay schweitzer engineering. Sel751a feeder protection relay documentation schweitzer.
Prevent insulation damage with a cableline thermal element. Page 1 sel 751 relay feeder protection relay instruction manual 20170927 pm75101nb page 2 sel products appearing in this document may be covered by u. Cold load pickup scheme using the sel 751 or sel 751a feeder protection relay using the sel 751 and sel 751a for highimpedance differential protection add difference voltage supervision to the sel 751 and sel 751a synchronismcheck element. Complete feeder protection with overcurrent, voltage, and frequency elements. The sel 751a relay is equipped with four levels of phase instantaneous overcurrent elements 50p1, 50p2, etc. Apr 04, 2019 sel 751 feeder protection relay 2 ms arcflash protection and feeder relay in one platform directly monitor and control your system using the 5inch, 800 480 color touchscreen display. Auxiliary input ac or dc settings output dry contact contact used to energize circuit breaker trip coil set relay thresholds and operation time current, voltage i and v, or other quantities input. The sel751 feeder protection relay provides a comprehensive combination of protection, faultlocating features, monitoring, control, and communication in an industrial package. Sel 751 feeder protection relay the sel 751 is the right solution for industrial and utility feeder protection, with flexible io options, easy mounting, and. Repaired schweitzer engineering sel751a feeder protection.
The fpu32 feeder protection unit provides integrated protection, metering, and datalogging functions. Flexible io options, easy mounting, and fast settings make the sel751 the right solution for industrial and utility feeder protection. The sel751a feeder protection relay provides an excep tional combination of protection, monitoring, control, and communication in an industrial package. Sel751a feeder protection relay 751a01ab72850200 ebay. The arcflash protection option in the sel751a relay adds fourchannel fiberoptic afd inputs and protection elements.
Schweitzer microprocessorbased distribution feeder protection relay, model number sel 751a, part number 751a01aoxoxox850000. Flexible io options, easy mounting, and fast settings make the sel 751 the right solution for industrial and utility feeder protection. Use of this equipment in a manner other than specified in this manual can. Protection relays allow the integrity of the distribution equipment, such as transformers, generators and transmission lines to be maintained. Sel protection and monitoring system murdoch university. Sel751 feeder protection relay, industrial engineering. New schweitzer engineering sel751a feeder protection relay.
Protection relay center for electrical engineers or enthusiast who wish to learn and study more about this field of electrical engineering enroll now protection relay center for. The sel 751 feeder protection relay is ideal for directional overcurrent, fault location, arcflash detection, and highimpedance fault detection applications. Sel751 feeder protection relay instruction manual sertec relay. Auxiliary input ac or dc settings output dry contact contact used to energize circuit breaker trip coil. Increased security combine lightsensing technology with fast overcurrent protection to provide high speed without false tripping. Sel751 feeder protection relay documentation schweitzer. Sel arcflash solutions sel 7105 motor protection relay sel 751a feeder protection relay sel 751 feeder protection relay sel 849 motor management relay sel family of sensorbased. Page 1 sel 751 relay feeder protection relay instruction manual 20170927 pm75101nb. The arcflash protection option in the sel 751a relay adds fourchannel fiberoptic afd inputs and protection elements. This photo shows a similar relay to rly0928, after it had undergone remanufacturing by resa power.
The sel 751a feeder protection relay is for industrial and utility feeder protection with flexible io options, easy retrofit, and fast setup and configuration. Page 1 sel 387a timeovercurrent elements the sel 387a provides. Actual photos of this sel 751a distribution feeder protection relay in its current condition are shown above. Aug 08, 2001 sel 351a distribution protection system directional overcurrent relay reclosing relay fault locator integration element standard instruction manual schweitzer engineering laboratories, inc. Pdf new features sel751 feeder protection relay erick. Each channel has a fiberoptic receiver and an ledsourced fiberoptic transmitter that continuously selftests and monitors the optical circuit to detect and alarm for any malfunction. Modular range in 4u high, 40te 4 60te 6 and 80te 8 width. Aug 06, 2007 sel751a feeder protection relay a diagram for a fourwire wye connection is also available in the instruction manual. Feeder protection relay sel recommends selecting the sel751 feeder protection relay in place of the sel751a. Highspeed, highcurrent interrupting outputs minimize the total faultclearing time. Sel 751 walk around feeder protection relay english.
Aug 12, 2015 feeder relay feeder relay sel 751a sel 751a sel 751a remote access. The sel751 provides complete protection for radial and looped distribution circuits. Learn how to establish communications with the sel 751 feeder protection relay. Sel 751a data sheet sel751a feeder protection relay major features and benefits the sel751a feeder protection relay provides an exceptional combination of protection, monitoring, control, and communication in an industrial package. Schweitzer engineering laboratories sel751 instruction manual.
Feeder protection applications of the sel751a require setting the relay, including. Sel351a distribution protection system sertec relay s. The sel751 supports additional protection and communications options, such as fault location, highimpedance fault detection, ethernetip, and an integrated web server. All of the figures in this data sheet show the factory default labels of the sel 751, including the standard model shown in figure 31. The sel751 feeder protection relay provides a comprehensive combination of protection. The sel751 feeder protection relay instruction manual describes common aspects of feeder relay application and use. Sel 751a installation manual pdf download manualslib. Page 2 sel products appearing in this document may be covered by u. Wiring diagrams sel 751 feeder protection relaya diagram for a fourwire wye connection is also available in the instruction manual. Refer to the sel751a manual for additional details and other options. Sel751 feeder protection relay schweitzer engineering. We have 1 sel 751a manual available for free pdf download.
Use a fiberoptic cable pair with st connectors c805 or c807 to connect to the port 2 on the sel751a. Feeder protection relay the sel751 is the right solution for industrial and utility feeder protection, with flexible io options, easy mounting, and fast settings. Feeder protection relay 641 pages summary of contents for sel sel 387a. Protection relay center for electrical engineers or enthusiast who wish. It offers arcflash mitigation, fault locating, event analysis, and more. View and download sel 751a instruction manual online. Support lowenergy analog lea voltage inputs in padmounted. Page 58 sel2812mt transceiver to connect to the sel2030 or sel2032 and bring irigb signal with the eia232 input. Page 1 sel 387a timeovercurrent elements the sel 387a provides numerous overcurrent elements, as many as 11 per winding and 5 per neutral input. Schweitzer engineering sel 751a feeder protection relay sel751a 40va 20w fpr. With its compact size and panelmount design, the sel 751a is the right fit for switchgear applications and electromechanical retrofit. Oct 14, 2019 overcurrent protection makes sure the relay does not trip for other sources of light, while the light sensors ensure the relay does not trip for an external fault.
Jun 07, 2018 sel relay 1 tmb2 tmb8 rmb1 rmb2 rmb8 tmb1 sel relay 2 tmb2 tmb8 rmb1 rmb2 rmb8 00 00 00 00 00 00 improve performance with sel mirrored bits communications. Sel 751a manuals manuals and user guides for sel 751a. New schweitzer engineering sel751a feeder protection. Express installation guide instruction manual configurable label. When the overcurrent elements of the transformer lowside relay pickup and the overcurrent elements in the feeder relays do not, the detected fault must be. The relay contains devices sensitive to electrostatic discharge esd. Schweitzer sel751a distribution feeder protectionrelay. Siemens type gmsg indoor metalclad 5kv switchgear and series 8 medium voltage motor control center with the following major components. Sel 751a instruction manual pdf download manualslib. With wireless or remote communications, you can keep out of the danger zone completely while gathering important realtime and historical data from the relays to coordinate protection for faster clearing times.
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