4/3/2023 0 Comments Sel 487e relay manual![]() ![]() SEL-487E-3 Transformer Protection Relay Protect and monitor transformers with the powerful. It provides proven primary and backup protection for utility and industrial generators to IEEE turbine protection standards. Overcurrent Protection-Provide backup overcurrent protection with the separate phase, neutral, and negative-sequence overcurrent elements, including instantaneous, definite-time, and inverse-time overcurrent elements.īreaker Failure/Fault-Cleared Detection-Detect breaker failure and bus fault status with an overcurrent element in series with the high-impedance element. The SEL-300G Generator Relay Apply the SEL-300G for comprehensive protection and control of small, medium and large generators. Simple Implementation-Apply simple settings and dedicated same-ratio CTs to create a cost-effective and easily expandable bus protection solution. ![]() The differential element’s internal 2000 ohm resistor allows high security to be maintained during heavy through faults or during CT saturation issues. A high-value setting can be used for a standard trip, while a low-value setting can be used as an open-circuited CT alarm. Two voltage-based setting levels are available. ![]() High-Impedance Bus Differential Protection-Provide high-speed, economical bus protection with a single three-phase differential bus zone. Use event reports and the Sequential Events Recorder (SER) for quick postevent analysis. The SEL-587Z High-Impedance Differential Relay is an economical and flexible relay that combines time-proven, high-impedance analog technology with the advantages of microprocessor technology. ![]()
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