Voltage behavior in UG cables and OH 11 KV distribution lines

In summary, voltage behavior in underground (UG) cables and overhead (OH) 11 KV distribution lines is affected by various factors such as load, length of the cable, and insulation. Voltage drop occurs in UG cables due to their longer length and higher resistance compared to OH lines, leading to a decrease in voltage at the end of the cable. On the other hand, OH lines experience voltage rise due to their shorter length and lower resistance. Proper insulation is crucial to minimize voltage drop and maintain a stable voltage level in both UG cables and OH lines. Regular maintenance and monitoring of these systems are necessary to ensure safe and efficient distribution of electricity.
  • #1
Ali Raza
3
0
i want to know the behavior of voltage in 11 KV underground and OH distribution line at different load conditions i.e. no load-full load ...
 
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  • #2
hi there
welcome to PF :smile:

your question is quite vague ... what type of behaviour are you referring to/wanting to know about ?
 
  • #3
davenn said:
hi there
welcome to PF :smile:

your question is quite vague ... what type of behavior are you referring to/wanting to know about ?
I meant the change in voltage and other parameters i.e. inductance, capacitance etc in case of different loading like no load , partial loading or full load, and what measures can be taken to prevent any such change .
 
  • #4
You want to regulate voltage on cables and OH lines. You need to consult with a power engineer, or to study power system analysis enough to do your own engineering.

Answer to questions such as the OP are unlikely to be complete enough to make good choices.
 
  • #5
anorlunda said:
You want to regulate voltage on cables and OH lines. You need to consult with a power engineer, or to study power system analysis enough to do your own engineering.

Answer to questions such as the OP are unlikely to be complete enough to make good choices.
Thank u i am trying ...
 
  • #6
that's not a one afternoon subject.
On the other hand, it's just the laws of Kirchoff and Ohm ...

First one learns the vocabulary
next the basic physical concepts
then the "shorthand" that designers employ to keep the calculations manageable.

As with any field of study It'll take time to become fluent.

One might start here:
http://www.electricalmanuals.net/files/APP-MANUALS/GE/GET-1008L.pdf
 
Last edited by a moderator:
  • #7
One obvious difference between overhead and underground cabling will be the Capacity between the conductors. This can have a very significant effect on very long runs, due to phase shift (/power factor).
 

1. What is the difference between UG cables and OH 11 KV distribution lines?

UG cables, also known as underground cables, are cables that are buried underground for the purpose of transmitting electricity. OH 11 KV distribution lines, on the other hand, are overhead lines that are placed above ground and supported by poles or towers. The main difference between the two is their location and method of installation.

2. How does voltage behave in UG cables and OH 11 KV distribution lines?

Voltage behavior in UG cables and OH 11 KV distribution lines is affected by several factors such as the type of insulation used, the length of the cable or line, and the load on the system. In general, the voltage in UG cables tends to be more stable compared to OH 11 KV distribution lines due to the added protection from the surrounding soil.

3. What are the common issues with voltage behavior in UG cables and OH 11 KV distribution lines?

Some common issues with voltage behavior in UG cables and OH 11 KV distribution lines include voltage drop, overvoltage, and insulation breakdown. These issues can be caused by factors such as cable/line length, load fluctuations, and environmental conditions. Regular maintenance and proper installation can help prevent these issues.

4. How is voltage controlled in UG cables and OH 11 KV distribution lines?

In UG cables, voltage is controlled through the use of transformers and voltage regulators. Transformers are used to step-up or step-down the voltage as needed, while voltage regulators are used to maintain a steady voltage level. In OH 11 KV distribution lines, voltage is controlled through the use of voltage regulators and capacitor banks.

5. What safety measures should be taken when dealing with voltage in UG cables and OH 11 KV distribution lines?

When working with voltage in UG cables and OH 11 KV distribution lines, it is important to follow all safety precautions and protocols. This includes using proper personal protective equipment, de-energizing the cables/lines before maintenance or repairs, and following proper grounding procedures. It is also important to regularly inspect and maintain the cables/lines to ensure safe operation.

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