If the three phase power supply has a three wire connection, the leads of the three phase power supply are coupled to two sets of {HEAD ~ three star coupled resistors} having {TAIL ~ different resistance values} 
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If the three phase power supply has a three wire connection , the leads of the three phase power supply are coupled to two sets of { HEAD ~ three star coupled resistors } having { TAIL ~ different resistance values }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL