How to Know the KV of a Transmission Line? Easy Way

Hey, today we are going to know, how to know or identify KV of a transmission line. There is a very easy way to identify KV rating of a transmission line. So let's go to know.

The most important thing which must be known to you that is, the disc insulator used in the transmission line rated for 11KV. So, 1 disc insulator = 11KV

So, if in a transmission line only one disc insulator per phase is connected then the transmission line carrying 11KV. For the 11KV transmission line, generally Double Pole(DP) structure is used.

In a transmission line, if three pieces of disc insulators per phase are connected, then the KV of the transmission line is 33KV. For the 33KV transmission line, generally, Four Pole structure is used. Sometimes double pole structure also used.

Read Also: Why Neutral Wire is not used in Transmission Line?

Pin insulators also used in 11KV and 33KV  transmission lines with single-pole structure 'V' cross arms. For 11KV small size pin insulators are used and for 33KV large size pin insulators are used.

For 66KV and 132KV transmission line, Towers are used. There mainly two types of insulators are used, one is Suspension type disc insulator, and another one is Strain type disc insulator.

If in a transmission line, five or six pieces of disc insulators per phase are connected then the transmission line carrying 66KV. Generally, five pieces of disc insulators per phase are used for suspension type and six pieces of disc insulators per phase are used for strain type.

If in a transmission line, nine or ten pieces of disc insulators per phase are connected then the transmission line carrying 132KV. Generally, nine pieces of disc insulators per phase are used for suspension type and ten pieces of disc insulators per phase are used for strain type.

Read Also:

• Line Capacitance and Earth Capacitance Effect in Transmission Line
• Why 400 KV not directly Stepped Down to 33 KV in Transmission Line?
• Main Purpose of Using Neutral Grounding Resistor

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