Refer to the sel 751a manual for additional details and other options. The relay includes two programmable threshold comparators and associated logic for alarm and control. All settings are edited under their requisite subsections and utilise selogic programming. Sel751a data sheet schweitzer engineering laboratories. Phase current relays, ground fault relays and arc flash relays are all be covered in this easypower refresher webinar. Sel 351a instruction manual pdf download manualslib. Mar 07, 2001 sel 3515, 6, 7 directional overcurrent relay reclosing relay fault locator integration element standard instruction manual schweitzer engineering laboratories, inc. How to set the sel710 motor protection relay youtube. Sel751 feeder protection relay instruction manual sertec relay. Conventions using a command line interface on a pc terminal emulation window.
The sel 311l relay implements line current differential protection using communications. A diagram for a fourwire wye connection is also available in the instruction manual. Sel 751 and sel 751a feeder protection relays with arcflash detection. The sel 751a relay is equipped with four levels of phase instantaneous overcurrent elements 50p1, 50p2, etc. Sel 5030 software for relay settings and logic programming. Sel751 feeder protection relay, industrial engineering.
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. Sel751a feeder protection relay documentation schweitzer. Cold load pickup scheme using the sel 751 or sel 751a feeder protection relay. New schweitzer engineering sel751 751101acaca77850220. Sel351a distribution protection system sertec relay s. Sel 751sel751a feeder protection relay the sel 751 feeder protection relay is ideal for directional overcurrent, fault location, arcflash detection, and highimpedance fault detection applications. I am using a programming manual simatic modbustcp communication using cp3431 and cp4431. Sel recommends selecting the sel 751 feeder protection relay in place of the sel751a. For more information on relay setting using a pc configuration, please refer to section 3 of the sel 751a instruction manual. Rulesbased settings editor provides online or offline relay settings that include interdependency checks. Openphase detection in the sel 751 and sel 751a feeder protection relays. At resa power, we dont just rebuild microprocessorbased relays, we remanufacture them. Nov 12, 2001 sel 311l relay contains all the protection, control, and communication features available in the sel 311c relay including distance, directional, and nondirectional overcurrent protection.
Start the acselerator quickset software program and establish communication with relay. Nov 16, 2015 we are having a communication of cp 4431 over modbus tcpip with a sel schweitzer engineering laboratories power protection device sel 751 a. The sel 751a feeder protection relay provides an excep tional combination of. Launching communication and getting setting parameters from relay 2. Undetectable permanent damage can result if you do not use proper esd procedures. Sel 587z instruction manual date code 20020903 caution. Pm751a01 the relay contains devices sensitive to electrostatic discharge esd. Figure 3 contains the settings editor for the sel 787 relay while figure 4 provides a comparison of the differences in the configuration options between the sel 421 and 751a. View and download sel 751a instruction manual online. Schweitzer nicholas kilburn 56 engineering laboratories, inc. Fast and secure arcflash mitigation reduces the incident energy of arcflash events. Testing procedure for sel 311l distance and differential relay.
This product is covered by the standard sel 10year warranty. To optimize protection security, each check zone supervises a designated phase in the system and a patented openct. Sel751 feeder protection relay documentation schweitzer. How to model sel 751 relay for arc flash protection in easypower. Easypower webinar how to model sel 751 relay for arc. The relay coil is also deenergized if the sel 751 power supply voltage is removed or if the sel 751 fails selftest status is fail. 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.
If you would prefer the value of a remanufactured sel 751a relay, resa power is your source for a high quality relay at a fraction of the cost of a new one. Figure 6 shows an sel 2505 application using existing distribution relays and a sel 2100 protection logic processor to provide bus and line protection for the radial system. Sel751a feeder protection relay electrical part manual search. Page 4 connections shown for the sel 751a with ethernet, fiber optic, irigb, eia232, 4 do3 di1 ao option, 8 di option, and voltage option. Sel products appearing in this document may be covered by u.
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. Distribution protection system directional overcurrent relay reclosing relay fault locator integration element standard. Equipment components are sensitive to electrostatic discharge esd. Aug 08, 2001 sel 351a distribution protection system directional overcurrent relay reclosing relay fault locator integration element standard instruction manual schweitzer engineering laboratories, inc. When working on the relay with the front panel removed, work surfaces. Dec 02, 2016 for more information about the iec 61850 logical nodes supported in the sel 751a and the associated relay word bits, see table f. Use this communication method to inter face directly with the device. Mar 25, 2019 the sel 487b bus differential and breaker failure relay protects bus systems with up to 21 terminals 21 cts per relay, 63 cts with a three relay scheme, 6 protection zones, and 3 independent check zones. How to model sel 751 relay for arc flash protection in easypower phase current relays, ground fault relays and arc flash relays are all be covered in this easypower refresher webinar. The sel 751 relay provides the tools necessary for. For mounting consideration, the relay dimensions are shown below. Instruction manuals schweitzer engineering laboratories. Substation battery monitorthe sel 751 relays that include the enhanced voltage option with the monitoring package measure and report the substation battery voltage connected to the vbat terminals. Sel 751a installation manual pdf download manualslib.
Connect to the sel 751a feeder protection relay via acselerator quickset sel 5030 software. Schweitzer sel751a distribution feeder protectionrelay. Featured instruction manual data sheet flyer literature. Sel 751a instruction manual pdf download manualslib. Sel 751 relays also have integration and communications features for secure remote. View and download sel 351a instruction manual online. Solid state or microprocessor based relays are generally equipped with a large variable of settings and curve options and some electromechanical relays provide for adjustable calibrated settings. Sel 751 data sheet schweitzer engineering laboratories, inc. Flexible io options, easy mounting, and fast settings make the sel 751 the right solution for industrial and uti. Sel 487b1 bus differential and breaker failure relay and sel 400 series relays.
The sel751a feeder protection relay provides an excep tional combination of. Page 20 briefly describes the serial port commands that are fully described in section 7. The sel 751 supports additional protection and communications options, such as fault location, highimpedance fault detection, ethernetip, and an integrated web server. Apr 04, 2019 the sel 751 combines lightsensing technology with fast overcurrent protection to provide highspeed arcflash detection as fast as 2 milliseconds without false tripping.
Sel 751a data sheet provided by northeast power systems, inc. Figure 3 contains the settings editor for the sel 787 relay while figure 4 provides a comparison of the differences in the configuration options between the sel 421 and. You can use the sel 751 directional and nondirectional overcurrent functions to protect virtually any power system circuit or device including lines, feeders, transformers, capacitor banks, reactors, and. The sel 751a feeder protection relay is for industrial and utility feeder protection with flexible io options, easy retrofit, and fast setup and configuration. Conventions typographic there are many ways to communicate with the sel 751a. 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 located on the bus. Feeder protection relay the sel 751 feeder protection relay is ideal for directional overcurrent, fault location, arcflash detection, and highimpedance fault detection applications. Pdf sel protection and monitoring system semantic scholar. Date code 20100129 instruction manual sel 751a relay. In addition, the sel751a is atex and underwriters laboratories ul class i, division 2certified for use in hazardous and potentially explosive environments. It is also available with a color touchscreen display. Sel751a feeder protection relay schweitzer engineering. Sel751a relay instruction manual date code 20100129.
Detailed operating instructions including installation, testing, and settings. Jim goes over every detail to ensure each type of fault is properly covered and the relay settings can be verified as you fault the system model. Pdf new features sel751 feeder protection relay erick. The relay coil is energized continuously if the sel 751 is powered and operational. Complete feeder protection with overcurrent, voltage, and frequency elements. The settings editor is the primary programing environment for the relays, where the structure of the dropdown menu is designed specifically for the connected or designed 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. Modbus communication over tcpip with sel relay 751a. Provides examples of how to use the sel 751a with the sel 2032, sel 2030, and sel 2020 communications processors for total substation automation solutions. Connect the relay to a pc using a sel c234a serial or sel c662 usb cable. The sel 2505 is an excellent auxiliary relay or a simple way of expanding the number of io points available in a system of relays. View and download sel 751a installation manual online. Flexible io options, easy mounting, and fast settings make the sel 751 the right solution for industrial and utility feeder protection.
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