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Basic monitoring of 10/0.4kV distribution transformers.

1 March 2017

Various DSO's in Europa are looking nowadays to impliment a very costeffective solution to monitor their 10/0.4kV distribution transformers. To do so, the 10/0.4kV distribution transformer is guarded by measuring voltages, active power, reactive power and currents. Also negative power (P,Q) must be measured because the renewable energy produced by for instance PV solar panels, EV charging facilities, windmill parks etc. is transported decentralized, in the opposite direction. This means implimenting a PQ measurement device, ideally equipped with mobile communication (GPRS, 3G, LTE), a SCADA slave/Modbus function, the SCADA in many cases a IEC 60870-5-104 protocol, some digital inputs and outputs and of course a tight security. In this way one box can deliver usefull data to the DSO in order to give basic 'smart grid' functionality.

Bausch Datacom designed exactly these kind of devices, offering communication, a IEC 60870-5-104/Modbus mapping, digital inputs and outputs and security.
The boxes are capable of executing on its own the basic metering (Q3 2017) or give access to a meter (by Modbus), and communicate these values to the SCADA.

DinBox RTU SL 104

IEC-60870-5-104 enabled! (Micro-) RTU in DINrail housing, with real time clock, 2 non isolated 12 bit AI, galvanically isolated DI (8) and DO (2)
and integrated GPRS modem, supporting NMKD-3085 ASCII (ABB), TMX, 60870-5-104...communication protocols. Powered via 85-264 Vac/120-370 Vdc mains
or 9-25 VDC (with optional power backup via 4 x Maxwell PC25 SuperCaps). Tailor made software on a project base.

 

Fig. 1: The boxes offer communication, a IEC 60870-5-104/Modbus mapping, digital inputs and outputs and security.
They are capable of executing on its own the basic metering (Q3 2017) or give access to a meter (by Modbus), and communicate these values to the SCADA.

DinBox RTU M4 104 (Q2 2017)

Second generation RTU that offers the same functionalities as the DB RTU SL 104, but enhanced with optional 3G or LTE communication, TLS security, additional Ethernet port (to be used as WAN or LAN port), webserver and in a later stage internal metering functionalities.