Line Trap
High voltage transmission line are used for the transmission of carrier signals between 30KHz to 50KHz for Speech, Data, and Protection signals. Line traps are used to prevent the loss of these high frequency signals to the sub-station side. The Line Traps are connected in series to the Transmission line and are designed to carry the rated power frequency current, as well as to withstand the substation fault currents.
BPL Telecom has Line traps starting from the range of 400A upto 4000A with inductance rating of 0.2mH, 0.5mH & 1.0mH.
The Line traps can easily be suspension or pedestal mounted depending on the design of the switchyard.
By choosing the inductance rating of 1.0mH the frequency bandwidth of 50 - 500 kHz can be achieved.
The product is type tested to IEC 353 recommendations.
Insulating materials used meets class 'F' requirements of temperature as per IEC.
High operational security ensured by
Full inter turn insulation with epoxy impregnated glass fiber
High short circuit strength inherent with continuous filament fiberglass "roving" and vertical and horizontal ties.
Self supporting, solid structure formed by encapsulation technique.
Epoxy resins compatible with the glass fiber under thermal shock condition.
Aluminum construction throughout with all current carrying connections welded.
Low noise levels at full load current kept very low.
Maintenance free.
Conditioned to withstand extreme temperature fluctuations and whether conditions.
Tuning element is designed with components carefully selected to give the optimum performance under all conditions of service.
Atmospheric pollution and climatic changes do not effect the performance.
No creep age path, due to the encapsulation of the main coil.
Standard conductors are used to minimize losses due to eddy currents.
The terminal supporting spider is reinforced to withstand the short circuit forces during fault conditions.
Corona ring provided to maintain the RIV voltage levels within specified limits.