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| Products for Protection, Monitoring, Control, Automation, and Metering |
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SEL-351
Directional
Overcurrent and Reclosing Relay
| Choose the SEL-351 Relay for transmission or distribution overcurrent protection with optional load profile recording, MIRRORED BITS® communications, and power quality monitoring capabilities. |
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- Complete
and Flexible Protection
Multiple phase, negative-sequence, neutral, and residual instantaneous/definite-time
overcurrent elements with independent pickup, time dial, curve, and reset
emulation settings. Numerous phase and sequence under- and overvoltage elements.
Six steps of frequency elements for multilevel under- and overfrequency trip
and control.
- Innovative
Directional Element Polarization
Positive-sequence voltage-polarized phase directional element with memory
for directional stability during phase faults.
Best Choice Ground Directional Element™ System logic for secure ground
directional element operation for all types of system grounding practices
under varying system conditions (SEL-351-5, -6, -7).
- Enhanced
Security on Heavily Loaded Feeders
Load encroachment logic allows phase overcurrent elements to be set independent
of load levels.
- Pilot Communications-Assisted
Trip Logic
Multiple pilot communications-assisted trip logic schemes available for use
with traditional pilot communications equipment or with optional MIRRORED BITS communications.
- Reclosing
Control
Programmable four-shot breaker auto-reclose with synchronism and voltage
check logic to match a variety of reclosing practices. Sequence coordination
logic to coordinate with downstream reclosers.
- Metering,
Load Profiling, PQ Monitoring
Accurate metering eliminates the need for external meters (Amps, Volts, MW,
MVAR, MWhr, MVARhr, PF, instantaneous/peak demand, frequency, dc volts).
Optional load profiling periodically records up to 15 quantities for daily,
weekly, and monthly trending information. Optional power quality monitoring
records voltage sags, swells, and interruptions.
- Input Voltage
Settings
Select line-neutral (WYE) or line-line (delta) input AC voltage connections
using software setting (SEL-351-5, -6, -7).
- ACSELERATOR® Software
Helps speed relay application by allowing you to develop relay settings off-line,
program SELOGIC® control
equations, and analyze post-fault event reports (SEL-351-5, -6,
-7).
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SEL accessories simplify operation and enhance the flexibility of SEL products.
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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.
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- Panel-mount
or rack-mount hardware package.
- Vertical panel-mount
(3U) hardware package.
- Connectorized® (plug-in
connectors) hardware configuration.
- MIRRORED BITS communications
and load profiling.
- Additional I/O
board with contact-sensing inputs and standard or high-current
interrupting contact outputs.
- Sensitive directional
power elements.
- Voltage sag,
swell, and interruption (VSSI) recording.
- Low range neutral
current input channel for non-directional Sensitive Earth Fault
(SEF) applications.
- Low range neutral
current channel for directional control for Petersen Coil grounded,
high-impedance grounded, or ungrounded power systems.
- Distributed
Network Protocol (DNP) 3 Level 2 Slave communications protocol.
- Conformal Coating—Protect equipment from harsh environments and airborne contaminants such as hydrogen sulfide, chlorine, salt, and moisture.
 Learn more about conformal coating.
- Protect and
control radial or looped transmission, subtransmission, or distribution
circuits.
- Use pilot protection
on transmission or subtransmission circuits, including three-terminal
lines.
- Apply directional
and nondirectional overcurrent protection for transformer/bus main/bus-tie
breaker.
- Protect and
control capacitor banks.
- Apply breaker
failure protection.
- Control auto-reclosing
with synchronism and voltage check logic.
- Protect small
generators.
- Protect distributed
generation interconnections.
- Shed load using
underfrequency elements.
- Add fault indicators to distribution protection and reduce fault-finding time by 50 percent.
- Send synchrophasor data to SCADA and wide-area measurement systems using SEL Fast Messages at rates of up to 60 times per minute. Accuracy of ± 1 degree and microsecond timing of event reports improve system visualization and event analysis. Use SEL-5077 SYNCHROWAVE® Server Software to time-correlate synchrophasor data from SEL-351 Relays and send it to display and archiving systems, such as SEL-5078 SYNCHROWAVE Console Software.
- Dispatch line
crews to quickly isolate overhead line problems and restore service
faster using built-in fault locator.
- Schedule circuit
breaker maintenance based on need as determined from breaker monitoring
data and alarms.
- Analyze overcurrent
protection system performance using built-in Sequential Events
Recorder (SER).
- Use SEL-5010
Relay Assistant Software to manage your relay settings.
- Use SEL-5040
Power System Report Manager Software to automatically gather
relay event reports on your PC and manage them with a database.
- Use SEL-5601
Analytic Assistant Software to display oscillograms and vector
diagrams to analyze event reports.
Budgetary
Retail, Quantity 1: $2,790
Fully Optioned Price: $5,058
(Prices
displayed are for planning purposes and are subject to change.
Contact your SEL sales representative today
for a quote on configurations and quantities to meet your needs.)
* CE compliance for screw-terminal block version only |
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2350 NE Hopkins Court - Pullman, WA 99163 – USA
Phone: +1.509.332.1890 - Fax: +1.509.332.7990
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