400v or 415v

by Yvette Gerlach DDS Published 4 years ago Updated 2 years ago

415V is usually nearer 400V in most places, unless you have HT supply from the utility. You need not worry. Use good protective relays and contactors though. Nothing worthwhile can ever be taught, it can only be learnt. Usually in small L V motor we have tolerance of 10 % in Voltage variation. In HT this

Full Answer

Is a 415V motor the same as a 400V motor?

It may be that the manufacturer produces motors for 400V, 415V and 440V (the three common voltages in that region) and has a single production line for all three, in which case the motor will be exactly the same as a 415V motor.

Is 415V too high for a 400V power supply?

It has been designed to operate on a 400 V nominal system and it is designed to be operated where the voltage is lower due to voltage drop. If your supply is running at 415 V, it is about 3.8% high but still less than +5%.

What's the difference between 380V and 415V?

It's a bit more complex in Europe where there are still legacy systems running at 380V and 415V, but both are now nominally 400V. 380V equipment has a hard life on a 415V system and overheats because of magnetic saturation. 415V motors on a 380V system overheat because of abnormally high slip.

Should I run a 400V motor on 480V?

If it's an old motor I would probably run it as long as it will last at 480V and then have it rewound (480V) or purchase a 480V motor. If you know who owned it before you could call and ask if they ran it at 480V. Thank you. It was similar except our motor is 400v/ 60 Hz .

Is 400V the same as 415V?

Is the UK 400V or 415V?

The UK used 415VAC 50Hz. Currently, ALL Western European 3 phase supplies are classified 400VAC. In reality there is no 400VAC supply unless you create one locally. 400VAC was a “standard” created during European "harmonisation" to give a single voltage standard across Western Europe, including UK and Irish Republic.

When did 415V become 400V?

For three-phase supplies the voltage was 415 V +/- 6%, the spread being from 390 V to 440V. Most continental voltage levels have been 220/380V. In 1988 an agreement was reached that voltage levels across Europe should be unified at 230V single phase and 400V three-phase with effect from January 1st, 1995.

What is 415V used for?

A 415v 50Hz three phase plug socket is traditionally used for industrial applications where powerful electrical equipment is being used. The power supply can be identifiable by its 5 pin plug socket. Cross Rental Services' most powerful electrical heaters such as the FF42 & FF80 operate on this power.

Is 3 phase always 400V?

In Three Phase System, the voltage level between any two phases out of three phases is 400V, Not 415, 440, 660 or 690V. This is only possible in case of ±% variation e.g. 400V±10% = 400V + 40V = 440V.

Is 3 phase always 415V?

Having 3 phases allows us to have both 240V and 415V power from the same electricity supply.

Why is 400V used?

In a nutshell, when neutral is not wired between the equipment and the supply there is no way that the loads are connected between phase and neutral - they must be connected between phases, which is 400V. If the neutral is here, you have the choice between 230V across loads, or 400V depending on the wiring.

Is 3 phase 415V or 440V?

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.

Is 400V low voltage?

The International Electrotechnical Commission (IEC) Standard IEC 61140:2016 defines Low voltage as 0 to 1000 V a.c. rms or 0 to 1500 V d.c. Other standards such as IEC 60038 defines supply system low voltage as voltage in the range 50 to 1000 V ac or 120 to 1500 V dc in IEC Standard Voltages which defines power ...

Is 415V High Voltage?

Low voltage – means any voltage exceeding 50V a.c. or 120V ripple free d.c. but not exceeding 1kV a.c. or 1.5kV d.c. Thus the normal voltages of 240V and 415V delivered to most customers are “low voltage”. High voltage (HV) – means and voltage exceeding 1kV a.c. or 1.5kV d.c.

Why is 415V 3 phase?

In the three-phase system, there is a 120-degree phase angle between phases and that is why at any moment two phases will be on a positive cycle and one phase will be on the negative side At a time One-half cycle is in a negative half cycle with respect to time . thats way output voltage is 415 and not 660.

Is 415V single phase?

Generally, 230V is called single phase supply & 415V is called 3 Phase supply.

How much of a transformer should be used for motor load?

For motor loads, do not exceed 60% of the maximum capacity of the transformer, because electric motors have start up requirements much higher than their running requirements. It's okay to oversize significantly, but never to undersize.

What frequency is a Euro transformer?

If you're operating in the United States, you'll most likely be running on 60 Hz. Our Euro Standard Transformers can come rated for 50 Hz or 60 Hz with many larger ones dual rated 50/60 Hz, while our Euro Plus transformers operate exclusively on 60 Hz.

Why are Euro Plus transformers so expensive?

TEMCo Euro Plus transformers are more expensive since they have a lot more voltage options and are usually in stock for emergency situations where time is an issue. You can check the stock of a transformer by clicking on its part number in the tables below.

What is the value of voltage between any two phases?

The Rule of Cosine (basic Law of Cosine in Trigonometry) shows that in a three phase system, the value of voltage between any two phases is 400V instead of 660 or 690V. This is only applicable if there are three phases (e.g. three separate conductors apart 120 degrees from each other).

How many volts does a 3 phase supply system have?

The vector addition based on the phasor diagram for 3-ϕ supply system, where each line has 230V, the vector difference is almost 400V for each phase (either Phase 1 & Phase 2, Phase 2 and Phase 3 or Phase 3 and Phase 1). This is due to the phase angle between two phases which is 120 degree and all the three phases change direction with respect time (in case of 230V, the sine wave changes it direction 50 times in a second due to 50Hz of frequency).

What is the voltage level between 3 phases?

What is the power of a 3 phase circuit?

In short, power in a 3-Phase circuit is PR + PY + PB. For example, if the power in Single Phase is 230W, the total power in Three Phase will be 3 x 230W = 690W.

How many positive values are there in a three phase power line?

From a different point of view, If we draw the sinusoidal waves of three phase power lines which are 120 degrees from the other phases, the graph clearly shows that we have only two Positive (+Ve) values at the same time and the third one is Negative (-Ve). We only calculate two out of three phases as all of them change the direction with respect to time. In Short, either Phase 1 and 2, Phase 2 and 3 or Phase 3 and 1 are positive while at the same time, either Phase 3, Phase 2 or Phase 1 are negative respectively. That’s why two phases in a three phase system have 400V instead of 600, 660 or 690V.

How many 360 degrees are in a single phase supply?

There are 360° in one cycle. The three phase supply divided into three parts i.e. 360° per cycle divided by 3 is 120°. This way, the phase difference between any two phases or lines is 120°. On the other hand, single phase supply has only one AC sinusoidal wave i.e. full 360° in one complete cycle.

Is power additive or scalar?

Power is additive (not like the voltage as mentioned above) and can be summed up like scalar addition e.g. Power in line 1 + line 2 + line 3.

What is the band of a 415 volt power supply?

If your nominal voltage is considered 415, then the band will be 394 to 436.

What is 440V?

440v (or 460, 480v) is usually associated with a 60hz supply system so you may be trying to connect a 50hz rated motor on to a 60hz supply system.

What is the nominal voltage of an induction motor?

That is why the motor nameplate is rated at 380 V. It has been designed to operate on a 400 V nominal system and it is designed to be operated where the voltage is lower due to voltage drop.

How many voltage levels can a three phase supply?

any three phase can supply two voltage levels.

How fast does a 4 pole motor run?

In any case, the motor will run faster. If it is a 4-pole motor with a nominal speed just under 1500 RPM , the new nominal speed will be just under 1800 RPM. Likewise a 2-pole motor will run at just under 3600 RPM instead of just under 3000 RPM. You must make sure the load is happy at the higher speed.

What happens if a motor draws more current than it is rated for?

If a motor is drawing more current than it is rated for on the nameplate, the wires that make up the windings will start to overheat. Overheating for any extended period of time will lead to a loss of lifespan of the motor. If the amount of current it is drawing is too far outside the nameplate rating, the motor will burn out all together.

What happens if an induction motor overheats?

Overheating for any extended period of time will lead to a loss of lifespan of the motor.

Why does a 415V motor overheat?

380V equipment has a hard life on a 415V system and overheats because of magnetic saturation. 415V motors on a 380V system overheat because of abnormally high slip. The older gear wasn't designed with sufficient margins to operate over the full European post-harmonisation voltage range, so caution is needed moving legacy equipment to new locations.

How many volts does a voltmeter have?

If you throw your voltmeter into any standard GPO you'll see a nice clean 240 volts.

What is the standard voltage in Australia?

In Australia our voltages were 'harmonised' to the European standard of 230/400 volts. In reality it just meant that the standard was changed with a higher percentage value on the upper figure, so for voltages below 1 kV the standard nominal voltage steady state is +10% -6%.

Why are asynchronous motors better than transformers?

Plus, occasionally, more inrush current. Asynchronous motors will run slightly "better" because the slip is reduced, so efficiency could improve somewhat.

Is nominal voltage universal?

Yes, the "nominal voltage" concept is generally universal, because when designing a machine or system, the engineer involved will (should) know that no two distribution systems will be exactly the same, there is always a tolerance, usually of +-10% minimum.

Is 400 V a rule?

The 400 V were more or less a rule in the "380" V world for many years. It is only lately (relatively) that newer equipment are rated 400 V. There are still lots and lots of 380 V equipment that now run on 400 V.

Can you use 380V on 400V?

I believe those voltages are now harmonized in Western Europe and classified as the 400V class. You can use a 380V equipment on a 400V system with confidence. Take note it's just a little over 5% of the voltage and most motor should be happy with that.

How much does a VFD cost?

2) A VFD would cost about $2K but would offer potential energy saving benefits. First a VFD can take a 480V input and give you a 400V at 60Hz output. Second you can use it to vary the frequency and thus speed of the motor. A dust collector is moving air, and during times of low load you may be throttling the air flow. You save significant energy if you can open a throttle and then get the reduced air flow with reduced motor speed. If you can drop power consumption by 20% for 50% of time (assuming continuous run) then you pay for the inverter in a single year from the energy savings.

Can you use more RPM on a fan?

It basically said it would be ok, if you can handle a bit more rpm. But more rpm on a fan (dust collector) would increase hp required, which in turn could over load the motor.

Does increasing motor V/Hz increase current?

Increasing the motor V/Hz will tend to _increase_ the magnetizing current but _decrease_ the running current .