PLCC Requirement for Transmission Line

PLCC - Power Line Carrier Communication ?

http://en.wikipedia.org/wiki/Power_line_carrier_communication

Please clarify exactly what you mean by PLCC.

Additionally please supply more information as I don't quite know what you are talking about. Do you mean the grid HV transmission line or the substation communications network.

Substation battery systems are sized based on current and expected future load with a reserve capacity designed to meet an expected minimum backup time over the life of the batteries. Do you know how much power a PLCC uses?

Please provide more information.

In Substations (S/S) we have two voltage level batteries, 220V for protection and emergency and 48V for communication. For sizing the 48V battery we need to know the number of PLCCs and EPAX/ EPABX used in the S/S.

PLCC in this regard is Power line carrier communication, for exchnaging signals as remote trip etc between two S/S they are placed at both end of the transmission line (HV) in substation.

We mostly use ABB or BPL PLCC and we have load data for these vendors along with the laod cycle.

However we are not clear on finalising number of PLCC required in a substation for a line ckt. We need to consider the future requirement of PLCC if additional line bays are planned hence it becomes difficult to finalise on battery size.

In case this information is not sufficient pl revert back.

Thanks.

From the ABB website (which you have already probably looked at)

http://www.abb.com/industries/db0003db004333/c12573e7003305cbc1257068002ea8dc.aspx

http://library.abb.com/global/scot/scot221.nsf/veritydisplay/9615adbfb9d72134c1257065003e5ccd/$File/897_ETL600%20Technical%20Data.pdf

Power used is between 135-335W. I didn't think you needed more than one of these at each substation for communication as it supports a number of channels and a high speed broadband modem.

A don't know a great deal about the specifics of your application or substation requirements in your country so cannot say for sure how many additional PLCC units you would need.

Have you checked with other substations or substation engineers on your network to see what they are using and size your batteries accordingly?