- Dependable
Overcurrent Protection
Six levels of phase, negative-sequence, neutral, and
residual overcurrent elements for coordinated protection,
along with phase and sequence under- and overvoltage
elements to maximize control scheme flexibility.
- Enhanced
Security
Voltage or load-encroachment control of the four phase
time-overcurrent elements for load security.
- Innovative
Directional Elements
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.
- Under-
/ Overfrequency Protection
Up to six steps of accurate frequency elements for multilevel
under- and overfrequency trip and control.
- Reclosing
Control
Programmable four-shot recloser with optional synchronism check
to match a variety of reclosing practices.
- Metering
Accurate metering eliminates the need for external meters
(MW, MVAR, MWh, MVARh, PF, instantaneous/peak demand).
- Input
Voltage Settings
Select line-neutral (WYE) or line-line (delta) input
AC voltage connections using software settings.
- ACSELERATOR® QuickSet 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-351A Version |
Standard
SEL-351A |
Nondirectional,
Three Voltage Input
SEL-351A1 |
| SELOGIC® Control Equations |
Yes |
Yes |
| Event Report |
Yes |
Yes |
| Sequential Events Recorder (SER) |
Yes |
Yes |
| Breaker Wear Monitor |
Yes |
Yes |
| Station Battery Monitor |
Yes |
No |
| DNP3 Level 2 Slave |
Yes** |
Yes** |
| High-Accuracy Metering |
Yes |
Yes |
| Remote and Local Control Switches |
Yes** |
Yes |
| Wye or Delta Voltage Connection |
Yes |
Yes |
| Synchrophasor Measurements |
Yes |
Yes |
| Fault Locator |
Yes |
Yes |
| Fast SER Protocol |
Yes |
Yes |
| Sensitive Earth Fault Protection |
Yes** |
No |
| Directional Protection |
Yes |
No |
| Two Residual Ground Time-Overcurrent Elements |
Yes |
No |
| Load-Encroachment Logic |
Yes |
No |
| Synchronism Check |
Yes |
No |
| ACSELERATOR® QuickSet™ Compatible |
Yes |
Yes |
| Conformal Coating |
Yes** |
Yes** |
** Ordering Option
|
- Provide
primary or backup overcurrent protection on distribution
systems with sensitive phase, negative-sequence, residual,
and neutral overcurrent protection elements.
- Use
wire-alike terminal configurations to take advantage
of advancing technology, improving system protection
performance, and reducing total costs. This is the
wire-alike upgrade for the popular SEL-251 Relay.
- Set
the sensitive phase and ground directional elements
for accurate and secure fault detection.
-
Enhance sensitivity with two independent residual ground time-overcurrent elements.
- Measure
and record in nonvolatile memory MW, MVAR, MWh, MVARh,
PF, instantaneous and/or peak demand, eliminating the
need for external meters.
- Provide
multi-step load shedding schemes using under- /overfrequency
elements.
- 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-351A Relays and send it to display and archiving systems, such as SEL-5078 SYNCHROWAVE Console Software.
Budgetary
Retail, Quantity 1: $1,790
Fully Optioned Price: $2,765
(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 |
