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a rotating electromechanical energy conversion device has the following inductances in terms of 8 in radians theta
1 consider a toroidal coil with relative permeability of 1500 with a circular cross section whose radius is 0025 cm the
the following information is available about a 40 mva 20-kv400 kv single phase transformerusing the transformer rating
repeat problem 212 using per unit values assuming that 1000 kva is base apparent power and 3 omega is the base
assume that the base voltage is 4600 v in the system of problem 211 and that 50 mva is the corresponding apparent power
assume for the motor of problem 23 that 50 kw and 440 v are taken as base values find the voltage in per unit at the
consider the transmission link of problem 22 and choose 100 kva and 2300 v as base kva and voltage determine the input
assume that 30 v and 5 a are chosen as base voltage and current for the circuit of problem 21a find the corresponding
a y-connected capacitor bank is connected in parallel with the loads of problem 213 finda the total kvar and
three loads are connected in parallel across a 1247 kv three-phase supply the first is a resistive 60 kw load the
the impedance of a three-phase line is 03 j24 per phase the line feeds two balanced three-phase loads connected in
for the machine of problem 318 assume that the active power supplied to the bus is 08 pu compute the power angle and
a salient-pole synchronous machine is connected to an infinite bus whose voltage is kept constant at 105 pu the direct
the equivalent impedance referred to the primary of a 23001230-v 500-kva single-phase transformer iscalculate the
a 500100 v two-winding transformer is rated at 5 kva the following information is availablea the maximum efficiency of
repeat problem 56 for bundle spacing of 24 in and subconductor gmr of 005 15 ft assume phase separation is 45 ftproblem
a 25 kva 2200220 v 60 hz single-phase transformer has the following equivalent-circuit parameters referred to the
1 a two winding transformer is rated at 50 kva the maximum efficiency of the transformer occurs when the output of the
a three phase transformer delivers a load of 83 mva at 08 pf lagging and 138 kv line-to-line the primary voltage under
solve problem 47 using matlabtm for a power factor of 07problem 47a 500 kva 23001230 v single phase transformer
a 500 kva 23001230 v single phase transformer delivers full rated kva at 08 pf lagging to a load at rated secondary
the no-load input power to a 50-kva 23001230-v single-phase transformer is 200 va at 015 pf at rated voltage the
determine the capacitive reactance in ohm miles for the line of problem 57 assume the conductors outside diameter is 16
the following information is available for a single-circuit three-phase 345-kv 360 mega volt amperes mva transmission
for the transmission line of problem 524 calculate the sending-end voltage sending-end current power and power factor