what is difference between HT and L T line -Tension word has been derived from French dictionary which stand for Voltage. A low-tension line is a low voltage line and a high-tension line is a high voltage line. In India LT supply is of 400 Volts for three-phase connection and 230 Volts for single-phase connection. High tension or HT supply is applicable for bulk power purchasers who need 11 kilo-Volts or above. Most small consumers of electricity like individual houses, shops, small offices and smaller manufacturing units get their electricity on LT connection. HT is applicable for bulk purchasers of electricity like industries (big manufacturing units), big offices, Universities, hostels and even residential colonies (if the apartment complexes purchase together in bulk). The tariff structures of most state distribution companies are different for LT and HT.
EXTRA HIGH TENSION LINE- line having Voltage of 132 kv, 220 kv and 440 kv also called extra high tension line.
HOW TO RECOGNIZE WHETHER LINE IS L T OR H T- in distribution system l t line possess 4 wire system- 3 for phase and 4 th one for neutral. and H T line don't has neutral wire. it only possess 3 wire for phase.
L T LINE DIAGRAM
H T LINE DIAGRAM
L T LINE WITH 5 WIRE SYSTEM- L.T. LINE contain voltage generally 220 v and 440 v. and in distribution system having 5 wire system. 3 for phase 4th wire stand for neutral and the 5 and last conductor usually placed for street light. but basically street light line got charged by any phase wire through looping.
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