one transformer is saturated it's no load current will
be ?
a. increases
b. decreses
one transformer is saturated it's no load current will be ? a. increases b. decreses
current transformer rating. what is the purpose of 5A secondary current rating for a Current transformer? if for example i have a generator that produces I rated of 180 A, and the load has I rated of 15 A, how does the ratio for current transformer be calculated? is it from 180 to 15 to 5, meaning two CTs are needed, one for 180 to 15, and one for 15 to 5? pls respond ASAP
3400V 400V single-phase transformer takes loss is 400W load current ICOS LOS and the one Determine the values of the magising and con los components of the Draw to cale the old phasor diagram for the
a. What is the PVR of a transformer delivering rated current to a purely resistive load if the transformer has R = 0.03 pu Q and x = 0.044 pu (the magnetizing branch impedance can be neglected)? Assume that the source voltage is 1 pu. (2 marks)
A single-phase 400V/200V transformer is supplying a load of 4 kW at 200 volts, 0.9 power factor lagging. Considering the transformer to be ideal, answer the following questions The output (secondary) current of this transformer 20.00/_25.84 A 20.00/_-25.84 A 22.22/_-25.84 A 22.22/_25.84 A 12.83/_-25.84 A 12.83/_23.28 A Load impedance in ohms. 8.10+j3.92 9.00-j4.36 3.62-j1.47 9.00+j4.36 4.50+j2.18 8.10-j3.92 The primary current 10.00/_25.84 A 10.00/_-25.84 A 40.00/_-25.84 A 44.44/_-25.84 A 11.11/_25.84 A 11.11/_-25.84 A The load impedance referred to the primary in...
An on load tap changer is installed on a transformer and shares the transformer tank. The tap changer mechanism and contacts and the transformer windings are in the same oil volume. Due to mechanical wear and contact oxidisation, one tap changer contact begins to get hot ( a few hundred degrees). This fault persists for months and will eventually cause the failure of the insulation on adjacent components. What protection systems or inspection procedures might detect this developing fault? Select...
The full load current of a transformer with 5% impedance is 500 amperes. The expected short-circuit current at the main switchboard is? Note: For simplicity, a conservative approach is to assume that the utility power network serving this transformer is sufficiently large enough to have practically zero impedance during a fault.
Q1) The no-load current of a single phase transformer is 5.0 A at 0.4 power factor, when supplied at 250V, 50Hz. Primary turns are 200.Calculate i) R.M.S value of flux (3 marks) ii) Magnetizing current (3 marks) iii) Loss current (4 marks)
Q1) The no-load current of a single phase transformer is 5.0 A at 0.4 power factor, when supplied at 250V, 50Hz. Primary turns are 200.Calculate i) R.M.S value of flux (3 marks) ii) Magnetizing current (3 marks) iii) Loss current (4 marks)
A step-up transformer increases 15.1 V to 120 V. What is the ratio of the current in the secondary as compared to the primary? Assume 94 percent efficiency.
3. a step-up transformer increases 23 V to 120 V. what is the current in the secondary coil as compared to the primary coil? assume 100% efficiency.