The product family and technology belonging from our sister company IGrid T&D.

A complete solution for all automation, supervision and control of energy network, ensuring maximum scalability, from small distribution substations to complex electrical transmission systems.



iRTU in accordo alla Specifica Terna

For all plants whose operation has an influence on the operation of the National Electricity System, Terna, in its "Grid Transmission, Dispatching, Development and Security Code", has established in Annex A.6 that the grid owner must make available all the information needed to perform the functions of supervision and control, remote regulation and remote monitoring of the plant.

To ensure the proper performance of Grid monitoring and control activities, Terna has established that for all:

  • NTG plants or plants functional to the NTG at a voltage greater than or equal to 50 kV;
  • Production, consumption and self-consumption and distribution plants connected directly to the National Transmission Grid or indirectly to the National Transmission Grid through a portion of the grid with a nominal voltage equal to or greater than 50 kV; 
  • HVDC and Interconnector AC plants directly connected to the National Transmission Grid; 
  • Production plants connected to distribution networks (including those belonging to Closed Distribution Systems)

measurements and reports must be made available to ensure the observability of each plant and the essential management functions of the electricity system.

The information must be made available at Terna's Access Points (APs) in a manner that is fully compatible with the Terna Control System as prescribed in Appendix A.13 of the Grid Code.

The data to be made available are both digital and analogue, and depend in number and type on the type of plant connected to the NTG, and include the states of the switching devices and the electrical measurements associated with the HV/MV system. The acquired data must be transmitted to the Terna Control System on a dedicated network using the IEC 60870-5-104 protocol.

Thytronic, thanks to its collaboration with the IGRID T&D subsidiary, supplies RTU (Remote Terminal Unit) systems compliant with the Terna specification (redundant CPUs) capable of acquiring the required signals both in wired mode (digital input, analogue input) and in serial mode (RS485/422 interfaces, Ethernet) using the most common industrial protocols:

  • IEC 60870-5-101
  • IEC 60870-5-104
  • IEC 60870-5-103
  • IEC 60870-5-102
  • Modbus TCP-IP
  • Modbus RTU
  • DNP3.0 (serial, UDP, TCP)
  • DLMS
  • Profibus DP
  • IEC 61850 MMS
  • IEC 61850 GOOSE
  • OPC UA 
The Thytronic RTU system can be perfectly integrated with the communication system (TLC) installed in the plant and managed by Terna, in particular the CPU in redundant configuration makes available respectively

  • 4 Ethernet RJ45 10/100 Base TX / F.O. FX100 (RSTP) ports for interfacing to the two Terna routers
  • 2 Rj45 Ethernet ports for measurement status acquisition on bus
  • 8 RS485/422 interfaces
  • Analogue and digital I/O modules for acquisition of wired stat



UPDM - Unità Periferica Difesa e Monitoraggio

In order to ensure the security of the National Electric System and prevent the propagation of a disturbance in the Transmission system with serious repercussions on the entire national grid, Terna has defined a Defense Plan. The Defense Plan includes all control actions arranged by Terna itself and implemented through individual systems and/or equipment, aimed at maintaining or returning the electricity system to a normal condition. 
In this perspective, the defense systems are intended to implement corrective actions such as disconnection actions in the case of predefined events or the need to modulate production. 
Within the production facilities enslaved to Terna's defense system, the Peripheral Defense and Monitoring Unit (UPDM) is a system that aims to acquire real-time measurements and other information from controlled processes from local protection, command, control, and supervision systems and to implement production detachment and modulation commands following the receipt of a message from other peripheral equipment or from Terna's central defense system. 
In order to ensure suitable response times, data exchange between the central defense system and other equipment in the field is performed via a dedicated telecommunications network, distributed to cover the entire country. The protocol used is based on the IEC 60807-5-104 standard

Main characteristics that the UPDM equipment must guarantee:
  • Flexibility to adapt to various applications and to the evolution of the system
  • Ability to interface with multiple centers simultaneously and to manage multiple communication channels on separate networks
  • High processing capacity and response times of less than 20 ms between receipt of command messages and their implementation 
  • Local management of logical automation sequences
  • Architecture based as much as possible on distributed intelligence

Thytronic's proposal

The UPDM apparatus developed by Thytronic, is certified in class A+ according to Terna's latest technical specifications. Therefore, it guarantees a time of less than 10ms for message issuance and simultaneous implementation of all prearranged commands. 
This class therefore guarantees the use of the Thytronic UPDM apparatus in all production facilities, such as generation plants, wind, photovoltaic and hydroelectric plants for which the defense system defined by Terna can be applied. 

Thytronic's offerings include: 

  • UPDM Central Defense and Monitoring Unit approved by Terna as per specification "TSPSD0707"
  • System engineering and cabinet supply
  • System configuration, installation and field testing
  • Accessories for interfacing with MPLS routers 
  • Interfacing for analog input signals and output control signals. 
The same equipment proposed by Thytronic can be used as UPDC (Peripheral Load Detachment Units) for interruptible users.