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This instruction manual provides information for the installation, operation, calibration, and maintenance of the ES-27 Undervoltage Relay, ES-59 Overvoltage Relay, and ES-27/59 Voltage Relay, including voltage monitoring and protection settings, relay outputs, timing adjustments, testing procedures, and technical specifications.

This instruction manual provides information for the installation, operation, calibration, and maintenance of the ES-27 Undervoltage Relay, ES-59 Overvoltage Relay, and ES-27/59 Voltage Relay, including voltage monitoring and protection settings, relay outputs, timing adjustments, testing procedures, and technical specifications.

This instruction manual provides information for the installation, operation, calibration, and maintenance of the ES-27 Undervoltage Relay, ES-59 Overvoltage Relay, and ES-27/59 Voltage Relay, including voltage monitoring and protection settings, relay outputs, timing adjustments, testing procedures, and technical specifications.

This instruction manual provides information for the installation, operation, calibration, and maintenance of the ES-27 Undervoltage Relay, ES-59 Overvoltage Relay, and ES-27/59 Voltage Relay, including voltage monitoring and protection settings, relay outputs, timing adjustments, testing procedures, and technical specifications.

This instruction manual provides information for the installation, operation, calibration, and maintenance of the ES-25 Sync-Check Relay, including synchronization monitoring, voltage and phase-angle settings, close-on-dead-bus operation, relay outputs, testing procedures, and technical specifications.

This instruction manual provides information for the installation, operation, calibration, and maintenance of the ES-25 Sync-Check Relay, including synchronization monitoring, voltage and phase-angle settings, close-on-dead-bus operation, relay outputs, testing procedures, and technical specifications.

This instruction manual provides information for the installation, operation, calibration, and maintenance of the ES-25 Sync-Check Relay, including synchronization monitoring, voltage and phase-angle settings, close-on-dead-bus operation, relay outputs, testing procedures, and technical specifications.

This conversion chart provides a cross-reference for replacing legacy BE1-CDS220 current differential relays with the BE1-11t Transformer Protection System, showing how to translate BE1-CDS220 style configuration options into equivalent BE1-11t model and option selections for transformer differential protection retrofit and upgrade applications.