supply of installation & commissioning of high voltage presence/absence detection and indication system/supply of high voltage presence/absence detection and indication system. , installation & commissioning of high voltage presence/absence detection and i ndication system with buzzer (will be activate when ohe on )with 5 core cable as per requirement at the time of installation & commissioning as per scope of work with annexur e-a [ warranty period: 30 months after the date of delivery ] ] , supply of high voltage presence/absence detection and indication system with b uzzer (will be activate when ohe on )technical specification :1- voltage from the distance 1.5 meter to 2 meter. 2- sensing voltage range:230v-33kv. 3- operating voltage:18kv-27 kv. system is single phase 2 30v, 50hz. ,the sensor should have 3 optional output.detailed technical spec as per attached document wit h annexure-a [ warranty period: 30 months after the date of delivery ] ]