26-06-2012, 05:41 PM
PLCC
PLCC.pptx (Size: 2.48 MB / Downloads: 111)
RRVPNL gets power from following stations:-
Badarpur Thermal Power Station Delhi
Bhakara Nangl Project (at satlaj in Punjab)
Gandhi Sagar Dam Kota
Jawahar Dam Kota
Rana Pratap Sagar Dam Kota
Rajasthan Atomic Power Plant (RAPP) Kota
Kota Super Thermal Power Station (KSTPS) Kota
Anta Gas Power Plant Anta
Rajasthan share in Bhakara Beas Management Board (BBMB)
PLCC (POWER LINE CARRIER COMMUNICATION
Power line act as the transmission line for the communication signals.
The audio frequency is carried by a Carrier frequency.
Modulation used is Amplitude modulation (SSB).
PLCC is used for interconnecting PBX’s (Private Branch Exchange).
The carrier frequency range is allocated to include the audio signal, protection and the pilot frequency.
PLCC SPECIFICATIONS:
GENERAL PLCC
Carrier frequency range 40 to 512 KHZ
Gross Channel band width 4 KHZ
2. TRANSMITTER
Peak envelope power 25W
Side band power 15 W
I.F. Carrier frequency 16 KHZ
3. POWER SUPPLY
DC supply 49 TO 60 (-10/+25%), 180W
4. Cable Attenuation
Permitted 32 dB maximum (Planning value 26 Db)
PLCC COMPONENTS:
Line Trap: It is connected in series with the power (transmission)line. It blocks the high frequency carrier waves(24 KHz to 500 KHz) and let power waves (50 Hz in India) to pass through.