- Comprehensive
Generator Protection
Numerous current, voltage, frequency, and distance elements provide comprehensive
protection for large and small machines.
- One
Hundred Percent Stator Ground Fault Protection
One hundred percent stator ground fault protection using both fundamental
frequency overvoltage and third-harmonic voltage differential elements to
protect high-impedance grounded generators.
- Current
Differential Protection
Optional current differential elements to optimize protection for larger
machines, yet economical enough for smaller machines. Phase shift and magnitude
difference compensation for current differential applications that include
generator step-up transformers. Current differential option includes individual
phase overcurrent elements for split-phase differential protection applications.
- Out-of-Step
Protection
Offers a choice of single- or double-blinder scheme to detect the loss of
synchronism condition.
- Overexcitation
Detection
Volts-per-hertz elements detect overexcitation in both the generator and
step-up transformer. Choose from multiple curves and definite-time elements
for alarm and tripping applications.
- Directional
Power Elements
Sensitive directional power elements protect against reverse power, overload
conditions, or low forward power.
- RTD-Based
Protection
Optional thermal protection elements work in conjunction with the SEL-2600A
RTD Module.
- Metering
and Reporting
Event reporting, Sequential Events Recorder (SER) reporting, and high-accuracy
metering eliminate or reduce external metering requirements.
- ACSELERATOR®QuickSet SEL-5030 Software
Helps speed relay application by allowing you
to develop relay settings off-line, program SELOGIC control
equations, and analyze post-fault event reports.
- Provide Secure Remote Control and Monitoring
Use Modbus®, ASCII, and SEL Fast SER capabilities for control, monitoring, and alarm purposes.
- Synchronism
checking element.
- Three-phase
current differential or ground differential elements.
- Additional
optoisolated inputs and standard or high-current interrupting
output contacts.
- Compatibility
with SEL-2600A RTD Module.
- Rack-mount
or panel-mount hardware.
- Conformal Coating—Protect equipment from harsh environments and airborne contaminants such as hydrogen sulfide, chlorine, salt, and moisture.
 Learn more about conformal coating.
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- Connect
the SEL-300G Relay (with optional current differential
elements) across large generators for complete primary
and backup protection. Adding the neutral voltage connection
provides 100 percent stator ground protection for most
machines, based on third-harmonic voltage measurements.
Connecting the neutral current input provides protection
for solidly grounded or resistance grounded machines.
- Apply
sensitive percentage-restrained current differential
elements and an unrestrained element, along with synchronism
check and volts-per-hertz elements, across the entire
unit to protect both the generator and the step-up
transformer.
- Replace
auxiliary meters at the generating station by taking
advantage of accurate internal metering.
- Use
the six-step frequency elements to trip for under-
and overfrequency operation, while accumulating off-nominal
frequency time in each 0.1 Hz band between 20 and 70
Hz. (Note: See IEEE guidelines for use of off-nominal
frequency data to track accumulated mechanical stress
in turbines.)
- Monitor
and record generator utilization with internal hour
meters that record stopped time, and full load hours.
- Record
accumulated breaker contact wear with the breaker monitor
function, which uses manufacturer's specifications
for defining breaker operation limits. The internal
monitor tracks the total number of close/open operations
and integrates interrupted current per phase. Set an
alarm to alert operators when measured and accumulated
quantities approach maintenance thresholds. This information
facilitates proactive breaker maintenance and replacement
without underutilizing resources.
- 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-5010
Relay Assistant Software to manage your relay
settings.
- Use SEL-5601
Analytic Assistant Software to display oscillograms
and vector diagrams to analyze event reports.
| 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. |
Budgetary
Retail, Quantity 1: $3,100
Fully Optioned Price: $6,680
(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.)
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