What is line current and phase current?

What is line current 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.

What is motor line current?

What is line current: The measure of current in one phase before the star or delta arrangement of the component is called line current (typically input current in motor or output current in the alternator). In three phase balanced system, it may be R phase current or Y phase current or B phase current.

How do you measure current in a 3 phase motor?

kVA = kW/pf You should notice that this is the exact same formula that was used above for single phase systems. You should then follow this formula up by dividing the kVA by the voltage (your VLN in the case of a 3 phase system) in order to calculate the current.

How many volts is a 3-phase line?

For three-phase, you connect line 1 to line 2 and get 208 volts. At the same time, you [can] connect line 2 to line 3 and get 208 volts. And you [can] connect line 3 to line 1 and get 208 volts.

What’s the difference between phase and line?

Terminology. The conductors between a voltage source and a load are called lines, and the voltage between any two lines is called line voltage. The voltage measured between any line and neutral is called phase voltage.

How do you calculate phase current and line 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 phase and line?

The conductors between a voltage source and a load are called lines, and the voltage between any two lines is called line voltage. The voltage measured between any line and neutral is called phase voltage. For example, for a 208/120 volt service, the line voltage is 208 Volts, and the phase voltage is 120 Volts.

What is line current?

Line current is the measured amount of direct current flowing in a pipeline. It is an indicator of the degree of reactivity and corrosion experienced on the pipeline’s surface.

Is 220V single or three phase?

Though 220V is supplied through two lines that are 180 degrees out of phase from each other, it’s still just considered one phase.

What is the measure of current in one phase called?

The measure of current in one phase before the star or delta arrangement of the component is called line current (typically input current in motor or output current in alternator). In three phase balanced system, it may be R phase current or Y phase current or B phase current.

How do you calculate the apparent power of a three-phase system?

The key to doing this is that the sum of power in each phase is equal to the total power of the system. For example, take a 400 V (V LL) three phase system with the following loads: phase 1 = 80 A, phase 2 = 70 A, phase 3 = 82 A the line to neutral (phase) voltage V LN = 400/√3 = 230 V phase 1 apparent power = 80 x 230 = 18,400 VA = 18.4 kVA

How do you calculate the power output of a three-phase motor?

Take a three phase motor (with three windings, each identical) consuming a given kW. The kW per winding (single phase) has to be the total divided by 3. Similarly a transformer (with three windings, each identical) supplying a given kVA will have each winding supplying a third of the total power.

What is the angle between line current and phase current?

The Line Currents are 120° apart from each other. Line currents are lagging by 30° from their corresponding Phase Currents. The angle Ф between line currents and respective line voltages is (30°+Ф), i.e. each Line current is lagging by (30°+Ф) from the corresponding line voltage.