What is line current and phase current in star delta starter?

For Delta connection, the line current is equal to the root three times the phase current. Therefore, Thus, with star delta starter, the starting current from the main supply is one-third to that of direct switching in the delta.

How do you find line current and phase current in delta connection?

i.e. In Delta Connection, The Line current is √3 times of Phase Current. As, all the Line current are equal in magnitude i.e….Line Currents (IL) and Phase Currents (IPh) in Delta Connection

Current in Line 1= I1 = IR – I. B
Current in Line 2 =I2 = IY – I. R
Current in Line 3 =I3 = IB – I. Y

What is line current and line voltage in delta connection?

Line voltage is the voltage magnitude between any two conductors connecting the source to the load, excluding ground or common. Line current is the current magnitude flowing in any conductor connecting the source to the load, excluding ground or common. Consider the delta-delta system of Figure 9.3. 1.

What is the starting current for star delta starter?

Motor Starting Characteristics of Star-Delta Starter Peak starting current: 1.3 to 2.6 Full Load Current. Peak starting torque: 33% Full Load Torque.

What is phase and line current?

Phase voltage is the voltage measured across a single component in a three-phase source or load. Line current is the current through any one line between a three-phase source and load. Phase current is the current through any one component comprising a three-phase source or load.

What is line current in delta connection?

Line current — The current on the ungrounded conductors (B1 and B2 in Fig. 6). In a delta system, the line current is greater than the phase current by the square root of 3, which is about 1.732). In a wye system, the line current equals the phase current.

What is line and phase current?

Line current is the current through any one line between a three-phase source and load. Phase current is the current through any one component comprising a three-phase source or load.

How do you find line current and phase current?

Phase current I(P) in Amps is equal to line current I(L) in Amps divided by root 3. Example: Calculate the phase current of the delta connected alternator output line current of 1500 Amps. I(P) = 1500 / 1.732 = 866 Amps.

What is line current in star connection?

In balanced star connection line voltage = √3 x phase voltage (in magnitude) and line voltage leads the phase voltage by 30o. The current in each winding is known as phase current (IPH) and the current flowing in each line is called line current (IL). In star connection line current is equal to phase current.

What do K2 and K3 represent in star delta starter?

The NO contact of K1 is wired parallel to S1 such that the circuit remains latched until S0 is pressed. After the time duration set on the star delta timer, the K2 coil is de-energized and K3 is energized and the motor runs in the delta configuration.

How do you calculate star delta current?

Motor Full Load Current (Line) = (10×0.746)x1000/1.732×415=13 Amp. Motor Full Load Current (Phase) =Motor Full Load Current (Line)/1.732. Motor Full Load Current (Phase) ==13/1.732=7 Amp. Motor Starting Current (Star-Delta Starter) =3xFull Load Current.

What is phase current?

The flow of current through any one component of the three-phase system to load is called Phase current. The Phase current is denoted by IPh. In a Star Connection, the phase current is equal to the line current or IPh = IL. In a delta connection, the phase current IPh = IL/√3.