Line Trap in Power Substations 3

[Ekwena1]

Hello,
#1 please could somebody give me details on the major purpose of line Trap in power substation designs.

#2 What will happen, if Line Trap are not used in in/outgoing line.
Thanks

 

[RRaghunath]

Ekwena1,

Line trap also is known as Wave trap. What it does is trapping the high frequency communication signals sent on the line from the remote substation and diverting them to the telecom/teleprotection panel in the substation control room (through coupling capacitor and LMU).
This is relevant in Power Line Carrier Communication (PLCC) systems for communication among various substations without dependence on the telecom company network. The signals are primarily teleprotection signals and in addition, voice and data communication signals.

The Line trap offers high impedance to the high frequency communication signals thus obstructs the flow of these signals in to the substation busbars. If there were not to be there, then signal loss is more and communication will be ineffective/probably impossible.
Hope this answers your query.

 

[Ekwena1]

Raghun,

Thanks very much, it makes a grate sense to me, thanks

 

[edison123]

raghun - LPS