- 21-Jul-2022

In the USA, 208V **single phase** and three phase voltage is one of the standard voltage levels used for commercial applications.

**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.

In the USA, 208V **single phase** and three phase voltage is one of the standard voltage levels used for commercial applications.

Answer: Phase unbalance of a three-phase system exists **when one or more of the line-to-line voltages in a three-phase system are mismatched**. Three-phase power systems and equipment are intended to operate with phases (Lines) balanced.

You can calculate the phase current of a delta transformer winding by dividing the phase VA by the phase volts: **I _{Phase} = VA_{Phase}÷E_{Phase}**. The phase load in VA of a 3-phase, 240V load is the line load divided by three (one third of load on each winding).

It is very easy, you only have to **divide the Voltage Line to Line (Phase-Phase) between root of 3 (√3)**. Example: One Condenser air conditioner has a phase-phase voltage of 480V, to know the phase-neutral voltage of the condenser simply divide 480V between √3, being as follows: 480V / √3, resulting in 277V.

**3 phase power has four wires; three actives and one neutral, and supplies power at both 240V and 415V**. When we bring 3 phase supply into a home it triples the amount of power available. This is because we have access to all 3 phases, so essentially this means we have 3 x single phase supplies connected.

**The three phase lines and the neutral together give a 3-phase 4-wire supply with a RMS voltage of 240√3** = 415V.

Three-phase power is **a three-wire ac power circuit with each phase ac signal 120 electrical degrees apart**. Residential homes are usually served by a single-phase power supply, while commercial and industrial facilities usually use a three-phase supply.

As shown in the figure below, the 3 phase supply has three wires (RYB). The voltage across any one phase and neutral is 220V, and the voltage across the 3 phase is **440V** because we check the voltage between any two-phase RY or YB or BR.

**Three Phase Power and Current**

- which can also be expressed as:
- Note: you can do these equations in either VA, V and A or kVA, kV and kA depending on the magnitude of the parameters you are dealing with.
- or alternatively as:
- the line to neutral (phase) voltage V
_{LN}= 400/√3 = 230 V.

**Single Phase** 120/240

It may also be called Split Phase 240. This configuration consists of 2 voltage legs that are 180 degrees apart. The voltage between the two legs (called phase to phase or line to line) is 240V and the phase to neutral voltage is 120V.

**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

In an ac circuit, there is a phase angle between the source voltage and the current, which can be found by **dividing the resistance by the impedance**.

Phase voltage to line voltage calculator:**Line voltage is V _{(}_{L-L}_{)} in volts equal to root 3 times of the phase voltage V_{(}_{L-N}_{)} in volts**. Example: What is the line voltage of the delta connected system whose phase voltage is 240 Volts. V

If you have 220 volts and 3 phase power available, **the kiln will come with a 3-wire powerblock for the 3 hot wires that give the 3 phase**. Between each hot wire, 220 volts can be measured. There is no need for a neutral wire to come to the kiln in this case, just an earth ground wire in addition to the 3 hot wires.

**Basic flat black fireplace paint is a good choice**; it's a neutral color and can hide soot easily. Black also tends to look nice with almost any fireplace and room decor. Beige, off-white, or almond create a fresh, bright look.

Generally, elemental sodium is more reactive than lithium, and **it reacts with water to form a strong base, sodium hydroxide (NaOH)**.

Statistical analysis is the main method for analyzing quantitative research data. It **uses probabilities and models to test predictions about a population from sample data**. What's the difference between descriptive and inferential statistics? Descriptive statistics summarize the characteristics of a data set.

Lithium, sodium, potassium, rubidium, caesium and francium belongs to alkali metals. We see, reaction rate of group 1 metals with water increases when going down the group. Therefore, **all group 1 metals should react with water**.

The energy input steps (1) and (2) are related to the activation energy of the reaction. So **the activation energy for Cs is the lowest, mainly because of its low ionization energy**. The lower the activation energy, the faster the reaction. So Cs reacts extremely fast — and you get an explosion.

+

## Your comment