The GE D20 EME Transformer Control Module is a device used in the control and monitoring of transformers in electrical power systems. The module is part of the GE Multilin D20 series of substation controllers, which are designed to provide reliable and accurate protection, control, and monitoring of power systems.

The EME Transformer Control Module is specifically designed for use with transformers and provides advanced monitoring and control functions. It can monitor transformer parameters such as voltage, current, temperature, and oil level, and can provide alarm notifications when conditions exceed predefined thresholds.

In addition to monitoring functions, the EME module provides advanced control capabilities for transformers. It supports tap changer control, which allows for automatic adjustment of the transformer winding ratio to maintain a constant output voltage. It also supports load tap changing, which enables the transformer to operate at different voltage levels depending on the load.

The EME module is designed to be highly reliable and includes features such as redundant power supplies and communication ports to ensure continuous operation. It also includes advanced security features such as password protection and role-based access control to prevent unauthorized access to the module.

Overall, the GE D20 EME Transformer Control Module is a powerful and reliable solution for the control and monitoring of transformers in electrical power systems. It provides advanced features for monitoring and controlling transformer parameters, and is designed to be highly reliable and secure.