belrayan supply and installation of 400kva servo transformer , supply/installation/commissioning of new servo voltage stabilizer for new hydle connection with testing report. (suitable for both balanced & unbalanced load) technical specification of servo voltage stabilizer are given below.capacity- 400kva,input voltage range- 300-470 volt-3 phase,output voltage- 433 +- 1% volt,no. of phase- 3 phase 4 wire system,frequency- 50 hz, type of cooling- onan,core material- crgo m-4 grade,copper grade- electrolytic grade,efficiency- 95% or above,no load losses- 0.12% of total capacity,full load losses- 0.7% of full total capacity, mode of operation- automatic/manual/hondle,response time- instantaneous (milli secound),waverform from distortion- virtually nill, overload capacity- 50% overload for 30 sec. & 75% overload for 10 sec.