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RTU is a microprocessor-controlled electronic device that interfaces objects in the physical world to a distributed control system or SCADA(supervisory control and data acquisition) system by transmitting telemetry data to a master system, and by using messages from the master supervisory system to control connected objects. Another term that may be used for RTU is remote telecontrol unit.
Modern RTUs are usually capable of executing simple programs autonomously without involving the host computers of the DCS or SCADA system to simplify deployment and to provide redundancy for safety reasons. An RTU in a modern water management system will typically have code to modify its behavior when physical override switches on the RTU are toggled during maintenance by maintenance personnel. This is done for safety reasons; a miscommunication between the system operators and the maintenance personnel could cause system operators to mistakenly enable power to a water pump when it is being replaced, for example.
Maintenance personnel should have any equipment they are working on disconnected from power and locked to prevent damage and/or injury.
RTU Stands for Remote terminal Unit. Through this RTUs you can remotely control your electrical equipments like (CBs, Gen, Trafos etc.). There are a lot of benefits of using it. Like you can increase the reliability of the system and decrese the human intervention/human error.
A detail answer is already added by Mr Lukman.
I apologize and leave the answer for the professionals
I apologize I leave it to experts
