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Using SMS and GPRS Mobile Phones To Control Reclosers

Comulsa, NOJA Power's distributor in Chile , has engineered a novel solution with the aid of Tele-Metric to control and monitor OSM reclosers from mobile phones and laptops. The system sends SMS messages to mobiles when alarm events occur. The operator then choose to send a message back in order to change a protection setting or Trip/Close the recloser. Comulsa chose to implement this system using a Tele-Metric TM 3500 communications controller.

The first design utilized the I/O modules in the RC01ES control cubicle. The I/O modules each have 6 inputs and 6 outputs. Up to two modules can be fitted into the cubicle. Events and control signals are mapped using a simple tool in TELUS.

When an output is activated, the TM3500 detects the signal and sends an SMS message. When an SMS message is received from a mobile it converts the message back to a signal on the corresponding input. This design is cost effective to implement and allows common mobile phones to be used as remote control devices.

Taking the concept a step further, Comulsa and Tele-Metric have implemented the DNP3 protocol inside the TM3500 so it can directly communicate with the RC01ES control cubicle through its RS232 or RS485 SCADA port. When combined with GPRS communication devices, nearly every aspect of the OSM recloser can be controlled.


RC01ES Control Cubicle

RC01ES Control Cubicle