It can stand for a lot of things, i.e. 57 Hydro Vac, 57 Heinz Varities...
57 H V - hienz varities
Its about the pickles
What is fullform of hv
HvÂ
The Elmo HV series are simple to use, but calibrating can be difficult.
insulation tester (Megger) can used to checked the short circuit on HV side. HI POT tester is also a means to checked the shot circuit in HV cable.
The Elmo HV series are great for presentations and have very strong colors.
in hv side, current will be less; so if we vary the rheostate, than thetre is less arcing with respect to lv side, so we always put the tap changer in hv side.
hv
HV = 2.9 * Y Where HV - Vickers hardness Y - Yiekd stress in KG/mm2
To ascertain the life of insulation, or effectiveness of the insulation (HV to LV, HV to earth and LV to earth) of the transformer
The Elmo HV-5100XG is requires very little assembly and can be up and running in 15 minutes.