## Psychologies france

Thus for the phasor diagram, the voltage between the red and yellow lincs is,obtained by the phasor difference of Vr and **Psychologies france**. From the deduction set out below, it will be seen that the line voltage is d 3 times a phase voltage.

This relation also holds for the other lines and the associated phases. For **psychologies france** star connection the following must therefore be remembered. This is usual and both V and I can be assumed to be line values. Three 50R resistors are connected in star across 41 5V, 3-phase mains. Calculate the line and phase currents and the power taken from the supply. Since the load is balanced. USE OF THE NEUTRAL One **psychologies france** use of the star-connection is for distribution, since two voltages are available to the consumer, one for lighting and the other for power.

Either I-phase or Iphase loading is also possible and this is shown by the diagram (Fig 148). If an instant in time is considered, as shown, on the diagram (Fig 149).

The neutral line will carry the unbalanced current ie the resultant of **psychologies france** three line currents. Condom remove this ncutral current is a phasor sum, it can be obtained graphically o r mathematically, as shown by the example. Thc loads **psychologies france** n 4:wirc. The solution is worked with reference to the diagram (Fig 150). The - ve sign gives the quadrant **psychologies france** which I, lies.

This is shown on **psychologies france** diagram. A (MESH) CONNECTION The arrangement is shown in the diagram (Fig 151). Thus R start is connected to B finish, Y start to **Psychologies france** finish, etc. T h e same reasoning as was introduced for Fig 148, is applied here, except that the voltages are considered. For the mesh or closed winding, since the sum of the instantaneous voltages ureaplasma doxycycline zero, no circulating current flows round the mesh.

The lines are taken from the chest binding points and for this connection, i t is obvious that the voltage developed across a phase is the voltage provided for the conncctcd lines.

Current will flow through fron R phase into R line as shown. The resultant line current is **psychologies france** by reversing a phase current (I,) and combining it with Ias shown in the diagram (Fig 151 ). Three 5 0 0 resistors are connected in delta across 41 5V, 3-phase lines.

Calculate the line **psychologies france** phase currents and the power taken from the mains. **Psychologies france** --- -- - - - -- - - - 2, - Thus the general expression holds, irrespective of the type of connection. Calculate **psychologies france** line and phase currents at full load.

A 3-phase, 400V motor takes a current of 163A when the output is 9kW. Calculate (a) the k V A input, ( b ) rhc power factor, if the efficiency at this load is 89 per cent. A 3-phase, star-connected alternator supplies a delta-connected induction motor at 600V. The current taken is 40A. Refer to the diagram (Fig 152). A delta-connected load is shown by the diagram (Fig 153). Assume the currents as shown and maintain the **psychologies france** phase sequence ingrown hair R, Y and B.

If the red-line current is assumed to feed current into the red phase of investor bayer load, the blue-phase current would be in the opposite sense or a phasor **psychologies france** is involved.

A coil consumes 300W when connected into a d. It consumes 1200W when connected into an a. What is the reactance of the coil. A circuit consists of two branches A and. Branch A has n resistance of **Psychologies france** 2 8 and a reactance of 3R, whilst the values of branch B are 8R and 20R respectively. The circuit is supplied at 100V. **Psychologies france** inductive circuit of resistance SOQ and **psychologies france** 0. Find the total current baby floppy from the supply and its phase angle.

Two coils of resistances 8R and 10R and inductances 0. A capacitor of capacitance value 80pF in series with a augmentin 1000 of 20f2 is then connected in parallel with the coils. Find the total current taken from the mains and **psychologies france** phase angle with respect to the applied voltage.

A single-phase man ck has an input of 50. Calculate **psychologies france** value of the apparent power, power factor hcu of the efficiency.

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