TAG5000S 4 to 230kV - Wireless Phase Comparator 

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Wireless phase comparator for three phase network with nominal voltages from 4 kV up to 230 kV – 50Hz or 60Hz (to be specified). SHall be used with two insulating sticks (not included) complying with the nominal voltage and having universal adaptors. 
Advantages:
Light and compact unit for overhead lines
Safety probes for indoor use
Positive indication for ‘’in phase’’ conditions
No hazard due to a cable link
Increase distance of operation (more than 25m)
Possibility of phasing through walls (inside outside)