SEL-451 Protection, Automation, and Bay Control System
The new SEL-451 is a complete stand-alone protection, automation, and control system. The SEL-451 has speed, power, and flexibility to combine complete substation bay control with high-speed breaker protection in one economical system. Use the SEL-451 as an integral part of a full substation protection, control, and monitoring solution. Reduce Maintenance costs by accurately tracking breaker operation. Monitor breaker interruption times and accumulated breaker duty to easily determine the need for proactive maintenance. Integrate information with SCADA or automation systems though a communications processor or directly to the Ethernet port.
New Features
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Transformer Inrush Harmonic Monitoring
Apply the second-, fourth-, and fifth-harmonic elements with individual threshold settings to detect transformer energization and overexcitation conditions. The output from these harmonic detection elements can be used for a variety of functions, including modification of relay settings to improve security and event reporting to make identification of transformer energization events fast and simple.
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Built-In Web Server
Access basic relay information on a standard Ethernet network with the built-in web server. View relay status, Sequential Events Recorder (SER), metering information, and settings for easy access within a local network. Web server access requires relay password and is limited to read-only viewing of information.
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Simple Network Time Protocol (SNTP)
Simplify wiring and installation by receiving a time signal over existing Ethernet networks. SNTP makes a good backup to more accurate IRIG time synchronization. The 5 ms accuracy is good for basic time synchronization throughout a substation.
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- Maximize the Capability of Substation Equipment
Fully load equipment by monitoring power, including thermal or rolling interval demand as well as peak demand on positive-, negative-, and zero-sequence current. Use the full capacity of the equipment while maintaining SEL quality protection. - Advanced Visualization Tools
The SEL-451 offers a configurable human-machine interface (HMI) to allow for easy integration into your application or operating standards. HMI tools include custom metering and status displays, direct pushbutton access, critical information alarms in chronological order, rotating display, and timestamped sequential events recorder (SER) report. Reduce errors by automatically scrolling between one-line bay diagrams, custom metering displays, and alarms. Download the One-Line Graphical Display Database for the latest bay configurations. - Bay Control for Two Breakers
Complete two-breaker control and breaker failure complement the versatility of the SEL-451 programmable logic to meet your bay control needs. Easily control motor-operated switches, capacitor banks, and field I/O from the front panel or remotely. Use configurable labels to customize relay controls to match your application. Flexible Communications
- An Ethernet card option provides two copper or fiber ports for failover redundancy.
- Simplify Ethernet network topology and reduce external equipment with dual Ethernet ports that offer a switched mode for looped Ethernet networks.
- Available Ethernet communications protocols include FTP, Telnet DNP3, LAN/WAN, IEC 61850, and IEEE C37.118 synchrophasors.
- All four independent EIA-232 serial ports support enhanced SEL Mirrored Bits® Communications, SEL Fast Message, SEL ASCII, Compressed ASCII, SEL Fast Operate, SEL Fast Meter, SEL Fast SER, and DNP3 Level 2 Slave.
- Improve Operation With IEEE Synchrophasor Data
Give operators critical system information via serial or Ethernet communications. Install required substation protection, monitoring, and control using the SEL-451, and get a built-in phasor measurement unit at each substation. Make control decisions based on voltage, current, or frequency data from other relays. The synchrophasor real-time control (RTC) capability makes this information available for local or system-wide control and automation. - High-Accuracy Timestamping
Time-tag binary COMTRADE event reports with real-time accuracy of better than 10 µs. View system state information at time of faults, or with timed triggers, across the entire system. Use system state information to validate system models and improve transfer limits and system stability. - Digital Fault Recording
Combine relaying reliability with true DFR functionality. The SEL-451 Relay's high-speed sampling (8 kHz) and COMTRADE output provide advanced oscillography. Use the acSELerator® QuickSet SEL-5030 Software graphical user interface for harmonic analysis and easy event viewing. - Integrate Many Substation Devices Into One Powerful System Using the SEL-451.
Control cooling fans, motor-operated switches, or other equipment using the processing and I/O of the SEL-451. Hardware options let you expand I/O to 55 inputs and 24 outputs. - Expanded SELogic® Control Equations
Use math and logic combinations of analog and digital values for customized applications. Adapt system control based on prefault conditions. Scale analog values and latch momentary inputs for SCADA retrieval. - acSELerator QuickSet Software
Help speed relay applications by developing relay settings offline, programming SELogic control equations, and analyzing post-fault event reports.
- Apply overcurrent protection for primary and backup, and three-pole tripping schemes on subtransmission lines.
- Make settings for up to four shots of automatic breaker reclosing for one or two circuit breakers, with synchronism and voltage checks to optimize system restoration.
- Use the built-in fault locator to efficiently dispatch line inspection and repair personnel.
- Operate power systems with maximum stable loading using real-time voltage and current synchrophasors.
- Implement breaker failure logic for one or two circuit breakers.
- Schedule as-needed circuit breaker maintenance and send alarms when the breaker monitor detects excess breaker contact wear.
- Track average and last circuit breaker operating time. Alarm on slow circuit breaker.
- Alarm for low-voltage conditions on one or two station batteries.
- Simplify the process of configuring the SEL-451 using the new Graphical Logic Editor (GLE) in acSELerator QuickSet® SEL-5030 Software . The GLE allows you to view your SELogic equations graphically so your settings files can be documented for easier validation and commissioning. Convert existing SELogic control equations to easy-to-read diagrams and save diagrams with your QuickSet settings.
- Use SEL-5601 Analytic Assistant Software to display oscillograms and vector diagrams to analyze event reports.
- Detect downed conductors and high-impedance faults with patent-pending Arc Sense technology.
- Alarm or protect against system frequency voltage and frequency excursions using built-in voltages and frequency elements.
- Rack- or panel-mount, horizontal and vertical hardware packages.
- Ethernet connection options for primary and standby connections
* 10/100BASE-T
* 100BASE-FX - One or two additional I/O boards with standard, high-interrupting or high-speed/high-interrupting outputs.
- User-configurable labels for operator controls and target LEDs.
- Connectorized® hardware configuration.
- Enhanced HMI with 24 target LEDs and 12 operator pushbuttons.
- Independent breaker trip/close pushbuttons with status indication, including 24 additional input and 4 additional output contacts.
- High-impedance fault detection using Arc Sense™ technology.
Conformal Coating—Protect equipment from harsh environments and airborne contaminants such as hydrogen sulfide, chlorine, salt, and moisture.
Learn more about conformal coating.
SEL provides options to help you efficiently and safely commission and test these relays.
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Streamline commissioning by using the SEL-4391 Data Courier® to send and retrieve settings, gather event reports, and install enhancements.
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When access to the back of panels and cabinets is allowed, use a Connectorized® version of this relay for fast installation and testing.
- SEL accessories simplify operation and enhance the flexibility of SEL products.
- Add independent breaker control to any relay. The SEL-9510 Control Switch Module easily installs in panel or rack locations for independent local control and status indications.
SEL University Training
- COM 403: IEC 61850 Technology
- IEC 61850 was created to be an internationally standardized method of
communication and integration and to support systems built from
multivendor intelligent electronic devices (IEDs) that are networked to
perform protection, monitoring, automation, metering, and control
functions. In this communications fundamentals course, you will learn
about the components and protocols that make up the IEC 61850 standard.
During this one-day course, you will walk through the IEC 61850 planning
process and identify key network considerations. This course also
provides a concise introduction to the concepts that will be applied in
SYS 403.
- SYS 403: Practical IEC 61850 Application
- The international standard IEC 61850 was designed to standardize
communications and integration methods and to support systems built from
multivendor intelligent electronic devices (IEDs) that are networked to
perform protection, monitoring, automation, metering, and control
functions. SYS 403 is designed to be interactive and activity based.
During this course, you will configure and implement a realistic IEC
61850 communications and automation scheme. Each unit of this course
will guide you, step-by-step, through configuring this comprehensive
communications and automation scheme.
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From the Product Configuration page, configure your product or enter your part number via the Universal Part Number Reverse Lookup. Then download custom .dwg or .pdf files specific to your product.
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