Schweitzer Engineering Laboratories, Inc. SEL-300G Data Sheet
The SEL-300G Generator Relay is a comprehensive, multifunction relay intended for primary and/or backup
protection for any size synchronous machine.
Features
Protection
➤ 100% Stator Ground
➤ Field Ground (with SEL-2664 Field Ground
Module)
➤ Phase (optional) or Ground Differential
➤ Vo l t s / H e r t z
➤ Reverse or Low Forward Power
➤ Backup Overcurrent Protection
➤ Negative-Sequence Overcurrent
➤ Loss-of-Field
➤ Six Levels of Over- or Underfrequency, Plus Time
Accumulators
➤ Over- and Undervoltage
➤ Inadvertent Energization
➤ Loss-of-Potential
➤ Synchronism Check (optional)
➤ Out-of-Step (single or dual blinder schemes)
➤ Compatibility With SEL-2600 Series RTD Module
(optional)
Monitoring and Metering
➤ Full Event Reports, Sequential Events Recorder
(SER), and Unsolicited Fast SER Messages
➤ Breaker Monitor and Battery Monitor
➤ High-Accuracy Metering
Communications
➤ ASCII, Binary, and Modbus Communications on
EIA-232 and/or EIA-485 Ports
➤ Unsolicited Fast SER Protocol
➤ IRIG-B Time Code Input
Control
➤ Advanced SELOGIC
®
Control Equations for
Traditional or Custom Logic Implementation
Relay and Logic Settings Software
Support
➤ ACSELERATOR QuickSet
®
SEL-5030 Software
Support for Ease of Relay Settings and Logic Pro-
gramming
Applications
The SEL-300G can be applied in primary or backup
applications for complete generator or unit protection.
Figure 1 Typical Application
SEL-300G0
Unit Backup
SEL-300G3
Unit Protection
Plus Synchronism
Check
or Ð
SEL-300G Generator Relay
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