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hi we have transformer three winding 132kv/33kv/6.6kv and power 63MVA now how dividing load crossing winding i mean when load from side 6.6kv this effect to side 33kv or only loading for 132kv onther words when loading to side 6.6kv is effect to 132kv(primary) or effect too to 33kv

hi we have vt transformer Y/y/d 33kv/110/110 now d is connected open to detection earth fault true? the end for open delta is connected to damping resistance now 1- Why take advantage for using damping resistance? 2- how calculated value damping resistance? 3-when not using damping...

hi how calculated rated power for 1- zagzag transformer with 10sec,30sec,1min,10min 2- NGR with 10sec,30sec,1min,10min 3- reactance with 10sec,30sec,1min,10min 4-star-delta closed with 10sec,30sec,1min,10min i need equation for calculated this informaton is very importment please and thanks

hi We have in AIS ABB substation breaker 33kv (VD4) VCB made in ABB china But when breaker in service position and open and incomer is live( I mean 33kv is found) Problem the bus is reading vn=400v or VL-L=700v why? Must be reading zero because breaker off Now if breaker is drawing to...

hi i need how testing battery is good or not good and how discharge battery a i need method testing and discharge

hi 1- i having load 500kw working at 400volt and have motor 360kw working 6600 by using step-up transformer 2- how choose power step-up transformer? 3-at starting motor 360kw how many time need to stability for generator i mean at starting voltage generator is reducing the governor and AVR will...

hi 1-how choose transformer suitable for metering or protection? 2- what happend if VA off load greather than VA for transformer current? for example metering CT 10VA 500/5 and load 1.2 ohm now max.load=10/25=0.4 ohm but load=1.2 what happend for ct 3- how caculated knee voltage Vk

hi how design earth system i mean how choice number rods and depth of well earth

how capacitor to reduce dropping voltage line i mean can you using to reducing dropping voltage by conection capacitor and how caculate power off this capacitor

hi how setting Varlogic NR6 -N12 if cabacitor bank has two stage has same power 500kvar ,6600v ,ct=3000/5 voltage in device 110v by using vt 6600/110 can be setting Varlogic NR6 -N12 to reading true power i mean source voltage 6600 but voltage in device 110v how matching between this voltage to...

hi how setting ALPTECC12 power factor contrller if have two stage has same power 600kvar and votage source 6600v