Transformer Relays

Transformer Relays provide primary protection, control, and back-up protection of transformers, including current differential, restricted ground differential, and overcurrent protection.
Transformer E-Series

ETR-4000

Eaton's ETR-4000 is a multi-functional, microprocessor-based relay for two winding transformers of all voltage levels. It provides phase and ground percentage restrained differential protection using a variable dual slope characteristic with overcurrent elements for backup protection.
ETR-5000

ETR-5000

Eaton's ETR-5000 is a multifunctional, microprocessor-based relay for two winding transformers of all voltage levels. It provides phase and ground percentage restrained differential protection using a variable dual slope characteristic with overcurrent elements for backup protection.