OLTC Transformer

A. Off circuit tap changing switch tappings from + 5% to - 5% in steps of 2.5% for hv variation or as per customer’s requirement.
B. On load tap changer
16 steps oltc for hv variation from + 5% to-15% in steps of 1.25% or as per specific requirements. Oltc for remote auto parallel operation can also be offered.
Quality control & routine tests
all surya's transformers undergo rigorous quality control checks and are routine tested as per is iec in our fully equipped laboratory. Any specific test required by the customer can also be arranged.
Standard fittings
rating and diagram plate.
Earthing terminals - 2 nos.
Lifting lugs.
Oil level indicator (plain)
drain-cum bottom filter valve with plug.
Oil filling hole with plug on conservator.
Oil conservator with drainplug.
Air release plug.
Silicagel air breather.
Bi-directional flat rollers.
Hv terminals-outdoor bushings.
Lv terminals-outdoor bushings.
Radiators.
Filter valve with plug.
Thermometer pocket.
Oil temperature indicator.
Explosion vent.
Sampling value