What equipment is the TTU distribution network automation terminal installed on

The TTU (Transformer Terminal Unit) is installed next to distribution transformers, primarily on the low-voltage side.TTUs are deployed adjacent to distribution transformers to monitor and manage the transformer's operating status, including oil temperature, three-phase current, voltage, and power factor on the low-voltage side . Their installation allows for refined management of transformer operations, providing data for line loss calculations, overload warnings, and power quality analysis . TTUs can also integrate low-voltage branch monitoring and detect distributed photovoltaic access, enhancing smart grid functionality .Functions and Deployment ContextMonitoring Transformer Output: TTUs collect statistics from the transformer's output meters and transmit data to the main station system .Control of Output Lines: They can operate circuit breakers on the transformer's output lines, enabling load management and protection .Power Quality and Load Management: TTUs monitor power quality, reactive power, and operational temperatures to judge load states and prevent overloads .Environmental and Security Monitoring: Some TTUs record environmental factors like wind, rain, and smoke, and include burglar alarms for transformer protection .Comparison with Other TerminalsUnlike FTUs, which are installed on feeder switches or pole-mounted devices for fast protection and control, and DTUs, which are typically installed in substations or ring main units for multi-circuit monitoring, TTUs are specifically focused on transformer-level monitoring and low-voltage management . This makes them essential for refined operational control and integration with distributed energy resources in modern distribution networks. In summary, TTUs are installed next to distribution transformers to provide detailed monitoring, control, and data collection for low-voltage distribution, supporting both operational efficiency and smart grid applications .