IMPART SECURE 400kV ,132kV,33kV (CLASS 3 and CLASS 4) SURGE ARRESTOR CONTRACT FROM POWER GRID 325MVA Substations Connected with 1200 MW Thermal power stations. IMPART Supplied Surge arrestor comes with Digital Surge Counter and leakage current detector . This feature will help operator know health of Surge Counter even from remote Operation Centre. Products come with 730 days warranty .