What is the voltage at the service with a 20V drop on a 3ph line of 347/600?

  • Thread starter rozilla
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In summary, the conversation discusses a voltage drop of 20V on a 3ph line of 347/600 and the resulting voltage at the service. The participants debate whether the voltage is 327V or 580V, with one person arguing that it is 580V due to the 120° phase separation and another stating that it is 327V due to the three single phase supplies being combined with a common neutral. The conversation also mentions that the voltage drop was not actually observed and is being used as a concept to better understand the operating voltage.
  • #1
rozilla
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Hi guys,

If there was a voltage drop of 20V on a 3ph line of 347/600, is the voltage at the service 327V or 580V, or both? Thanks you for reading.

RozilΩ
 
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  • #2
Is this a homework problem? What do YOU think the answer is, and why?
 
  • #3
Who observed a voltage drop of 20V ?
How did they measure it ?
 
  • #4
Hi guys,

This isn't school related. That isn't the actual voltage - I'm trying to understand the concept of which would be the operating. With the concept, I can apply it accordingly. I assume it is 580 as it is three phase.
 
  • #5
The specified voltage is 347V / 600V.
The three phases are separated by 120°. 1 / Tan(30°) = √3 = 1.73205
If you multiply 347V by √3 you get 600V.
You cannot change one without changing the other.

When combined with a common neutral you have three single phase supplies of 347V, relative to the neutral. The voltage between the phases is 600V.

A 20V single phase drop is a 34.6V three phase drop.
A 20V three phase drop is an 11.5V single phase drop.
 

1. What is voltage at service?

Voltage at service refers to the amount of electrical potential difference present between the power supply and the electrical equipment or devices being used. It is typically measured in volts (V) and is an important factor in determining the efficiency and safety of an electrical system.

2. How is voltage at service measured?

Voltage at service can be measured using a voltmeter, which is a device that measures electrical potential difference. It is typically connected in parallel to the electrical circuit or equipment being measured and provides a reading in volts.

3. What is the standard voltage at service?

The standard voltage at service varies depending on the country or region. In the United States, the standard voltage at service is typically 120 volts for residential buildings and 240 volts for commercial buildings. However, in other countries, such as in Europe, the standard voltage at service is 230 volts for both residential and commercial buildings.

4. What factors can affect voltage at service?

Voltage at service can be affected by a number of factors, including the distance between the power supply and the electrical equipment, the quality of the electrical wiring and connections, and the number of devices connected to the circuit. Other factors such as weather conditions and power grid fluctuations can also impact voltage at service.

5. What are the potential dangers of incorrect voltage at service?

Incorrect voltage at service can pose a number of dangers, including damage to electrical equipment, increased risk of electrical fires, and electric shock to individuals. It is important to ensure that the voltage at service is within the recommended range to prevent these potential hazards.

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