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This application note explains the operating principles and application of the ES-47 Phase Sequence Relay for detecting correct phase rotation in three-phase power systems. It describes relay connections, phase sequence identification, and installation considerations for A-B-C and A-C-B system configurations.

This application note explains how the ES-32 Reverse Power Relay improves protection performance by measuring true real power rather than apparent power. It highlights applications for generator protection, loss-of-prime-mover detection, and reverse power monitoring in utility and industrial power systems.

This application note explains how the ES-25 Sync-Check Relay provides enhanced synchronizing supervision by evaluating both voltage magnitude and phase angle differences between a generator and the power system. It highlights methods that improve synchronization accuracy, simplify operation, and help prevent improper breaker closure.

This conversion chart provides a cross-reference for migrating legacy BE3-81 series frequency relays to ES-81 series relays, showing how to translate model numbers and style configuration codes while maintaining equivalent sensing, input, frequency, power, and output options.

This conversion chart provides a cross-reference for migrating legacy BE3-81 series frequency relays to ES-81 series relays, showing how to translate model numbers and style configuration codes while maintaining equivalent sensing, input, frequency, power, and output options.

This conversion chart provides a cross-reference for replacing legacy BE3-74VH, BE3-74VL, and BE3-74VD voltage relays with ES-74V relays, showing how to translate BE3 style configuration options into equivalent ES-74V model and option codes for retrofit applications.

This conversion chart provides a cross-reference for replacing legacy BE3-74VH, BE3-74VL, and BE3-74VD voltage relays with ES-74V relays, showing how to translate BE3 style configuration options into equivalent ES-74V model and option codes for retrofit applications.

This conversion chart provides a cross-reference for replacing legacy BE3-74SH, BE3-74SL, BE3-74SD, and 76SH static relays with the ES-74S relay, showing how to convert BE3 style configuration options to equivalent ES-74S model and option codes for retrofit and upgrade applications.