SEL-300G

SEL-300G

Generator Relay

Provide primary and backup protection for utility and industrial generators to IEEE turbine protection standards.

Starting at

$4,620
View popular models

Complete Generator Protection

Connect the SEL‑300G Generator Relay across large generators for complete primary and backup protection. Adding the neutral voltage connection provides 100 percent stator ground protection, based on third-harmonic voltage measurements. Connecting the neutral current input provides protection for solidly grounded or resistance-grounded machines.

Secure Remote Control and Monitoring

Use Modbus and ASCII communications capabilities for control, monitoring, and alarming. Control relay operation and initiate or block automation sequences from remote or local control systems.

Current Differential Protection

Apply sensitive percentage-restrained current differential elements and an unrestrained element, along with synchronism check and volts-per-hertz elements, to protect both the generator and the step-up transformer. The SEL-300G includes phase shift and magnitude difference compensation for current differential applications that include generator step-up transformers.

Overexcitation Detection

Detect overexcitation using volts-per-hertz elements in both the generator and step-up transformer. Choose from multiple curves and definite-time elements for alarm and tripping applications.
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APP 300G: SEL-300G Generator Relay

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PROT 409: Generation System Protection

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SEL-300G Details

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.
  • Rack-mount or panel-mount hardware.
  • Conformal Coating—Protect equipment from harsh environments and airborne contaminants, such as hydrogen sulfide, chlorine, salt, and moisture.

300G#01

Price: $6,746.16 | Savings: $234.00

  • Generator relay with differential protection
  • Horizontal panel mount
View configuration

300G#02

Price: $6,746.16 | Savings: $234.00

  • Generator relay with differential protection
  • Horizontal rack mount
View configuration

300G#03

Price: $8,450.44 | Savings: $294.00

  • Generator relay with differential protection and synchronism check
  • Additional inputs and outputs for easy integration
  • Modbus protocol
  • Horizontal panel mount
View configuration

300G#04

Price: $8,450.44 | Savings: $294.00

  • Generator relay with differential protection and synchronism check
  • Additional inputs and outputs for easy integration
  • Modbus protocol
  • Horizontal rack mount
View configuration

Configuration Software

acSELerator QuickSet SEL-5030 Software

QuickSet is a tool for engineers and technicians to quickly and easily configure, commission, and manage power system devices. QuickSet includes a Graphical Logic Editor and a device template tool to reduce configuration time and streamline deployment. Learn more and download on the QuickSet software page.

Automated Data Collection

SEL Device Management and Automation (DMA) Application Suite

Available on the Blueframe platform, DMA applications automatically collect, store, and manage device-specific information like oscillography, Sequence of Events (SOE) data, device settings, and property information. They also provide automated password rotation and streamlined device audits. Learn more on the DMA software page. 

Visualization and Analysis

SEL-5601-2 Synchrowave Event Software

Synchrowave Event helps engineers diagnose a protective relay’s behavior during a power system fault. It is a powerful and easy-to-use solution for displaying and analyzing SEL relay event reports and COMTRADE files.Learn more and download on the Synchrowave Event software page. 

Instruction Manuals