451#01
Price: $7,790.45 | Savings: $285.00
- Feeder protection
- Dual-breaker bay control and breaker wear monitoring
SEL-451
Protection, Automation, and Bay Control System
The SEL-451 is a complete standalone system. It has the speed, power, and flexibility to combine complete substation bay control with high-speed breaker protection in one economical system. You can use the SEL-451 as an integral part of a full substation protection, control, and monitoring solution. It reduces maintenance costs by accurately tracking the breaker operation. By monitoring breaker interruption times and the accumulated breaker duty, the SEL-451 helps you easily determine the need for proactive maintenance. You can integrate information with SCADA or automation systems through a communications processor or directly to the Ethernet port. Transform the way you modernize your substation with optional Time-Domain Link (TiDL) technology or Sampled Values (SV)-based technology using IEC 61850-9-2 or IEC 61869-9. SEL-400 Series Relay Mimic Diagrams
Starting at
$5,700
Dual Breaker Bay Control
Meet your bay control needs with complete two-breaker control and high-speed breaker failure detection. You can easily control motor-operated switches, capacitor banks, and field I/O from the relay front panel or remotely. Configurable labels enable customization of relay controls to match your application.
Rapid Bay Control Commissioning
Choose among different bus configurations, including single- and dual-busbar, transfer bus, tie-breaker, breaker-and-a-half, ring-bus, double-bus/ double-breaker, and source-transfer configurations. These bus arrangements allow easy status and control of as many as 20 disconnect switches and two breakers.
High-Impedance Fault Detection
Detect high-impedance faults with Arc Sense technology (AST). High-impedance faults are a common result of a downed conductor on surfaces with poor conductivity. With AST, the SEL-451 alarms or trips for faults that produce low fault current and are undetectable with conventional overcurrent relays.
Complete Overcurrent Protection
Customize distribution protection with multiple instantaneous and time-overcurrent elements combined with SELogic control equations. Best Choice Ground Directional Element logic optimizes directional element performance and eliminates the need for many directional settings.
Pad-Mounted Switchgear Protection
Protect pad-mounted switchgear with low-energy analog (LEA) voltage inputs; this helps you save in overall system cost by eliminating the need for amplification electronics between the line sensor and the relay. Having fewer devices also leads to a simpler system, a reduction in labor costs, and the elimination of a possible point of failure.
Breaker Wear Monitoring
Compare published data from the breaker’s manufacturer to the actual interrupted current and number of operations for two breakers, and create alarms accordingly. You can monitor mechanical and electrical interruption time per pole, comparing average and last trip times for maintenance scheduling.
Digital Secondary System Technologies
SEL TiDL and SV-based solutions replace copper with fiber to increase safety, improve reliability, and limit the impact of an electromagnetic pulse. Apply the SEL-451-6 TiDL relay with the SEL-TMU TiDL Merging Unit in the field to provide remote I/O and digitize analog signals. This simple point-to-point solution with a strong cybersecurity posture is easy to implement. Apply the IEC-compliant SEL-451-6 SV relay to receive SV data from a remote merging unit via a network, or use it as an SV merging unit to publish data to remote SV relays in the control house. Improve system availability in SV applications with the Parallel Redundancy Protocol (PRP), the High-availability Seamless Redundancy (HSR) protocol, or seamless failover using a five-port Ethernet card.
Flexible Communications Options
Use small form-factor pluggable (SFP) transceivers on designated process bus, station bus, and engineering access ports in the five-port Ethernet card. Choose between single- and multimode communications options for increased flexibility. All ports support 100 Mbps SFP transceivers, and process bus ports also support 1 Gbps SFP transceivers.
SEL-451 Features
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- EIA-232 front serial port is quick and convenient for system setup and local access.
- Interactive bay display with user-configurable apparatus labels allows the operator to view the status of breakers and disconnect switches and to control them.
- Easy-to-use keypad aids simple navigation.
- Front-panel LEDs indicate custom alarms and provide fast and simple information to assist dispatchers and line crews with rapid power restoration.
- Programmable operator pushbuttons with user-configurable labels allow front-panel customization.
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- Choose from a vertical or horizontal, panel-mount or rack-mount chassis and different size options.
- Use a maximum of 68 output contacts. Requires 8U chassis.
- Communications protocols include FTP, Telnet, synchrophasors, DNP3 LAN/WAN, PRP, IEC 61850 Edition 2.1 (optional feature), and the IEEE 1588 Precision Time Protocol Version 2 (PTPv2).
- Use three rear EIA-232 ports for Mirrored Bits communications, DNP3, SCADA, and engineering access.
- Use a maximum of 103 input contacts. Requires 8U chassis.
- Order six current inputs in standard terminal blocks (as shown) or a Connectorized hardware configuration.
- Choose six voltage inputs in either standard terminal blocks, a Connectorized hardware configuration, or a low-energy analog (LEA) hardware configuration.
- Power supply options include: 24–48 Vdc; 48–125 Vdc or 110–120 Vac; or 125–250 Vdc or 110–240 Vac.
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- 4U or 5U chassis with mounting options (vertical or horizontal; panel or rack) accommodates your application needs.
- Select a five-port Ethernet communications card for dedicated station bus and engineering access ports.
- LEDs indicate the connection status to an SEL-TMU on a per-port basis.
- Eight SFP ports allow the TiDL relay to connect with eight remote SEL-TMU devices and to receive remote analog and digital data.
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- The 4U chassis has various mounting options to accommodate hardware needs.
- Select a five-port Ethernet communications card for dedicated process bus, station bus, and engineering access ports.
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- Chassis options (for up to three I/O boards) and mounting options accommodate hardware needs.
- Select a five-port Ethernet card for dedicated process bus, station bus, and engineering access ports.
- Six current and six voltage analog inputs support signal digitization and local protection schemes.