supply of high voltage presence/absence detectionhigh voltage presence/absence detection,installation and commissioning of high voltage presence/absence detection and indication sy stem with 5 core cable as per requirement at the time of installation and commissioning. [ warranty peri od: 30 months after the date of delivery ] ] , high voltage presence/absence detection and indication system. technical specification: (i).- voltage from the distance 1.5 meter to 2 meter. (ii). sensing voltage range: 230v-33kv. (iii). operating vol tage: 18kv - 27kv. detailed technical spec as per attached document. [ warranty period: 30 months afte r the date of delivery ] ]