Description :SCREENED MULTICORE DATA CABLE 2 x 0.5 SQMM SHIELDED TWISTED PAIR JACKETED\rCABLE FOR KOLKATTA METRO ROLLING STOCK APPLICATIONS FOR COMMUNICATION AMONG\rDIFFERENT SYSTEMS TO THE FOLLOWING SPECIFICATION. TECHNICAL REQUIREMENT: THE BASIC\rREQUIREMENT IS AS FOLLOWS: 1 PAIR SHIELDED TWISTED PAIR JACKETED CABLE. THE CABLE\rSHALL HAVE NOT LESS THAN 12 TWISTS PER METRE. DIFFERENTIAL CHARACTERESTIC IMPEDANCE\rOF UNLOADED LINE SHALL BE 120 OHM+/- 10% FOR SINUSOIDAL SIGNAL OF FREQUENCY BETWEEN\r0.75 MHz TO 3 MHz. THE CROSS SECTIONAL AREA OF THE WIRE SHALL BE BETWEEN 0.34 SQMM\r(AWG22) AND 0.56 SQMM (AWG20). CABLE ATTENUATION SHALL BE LESS THAN 15 dB/KM AT 1.5 MHz\rAND LESS THAN 21 dB/KM AT 3 MHz. DIFFERENTIAL DISTRIBUTED CAPACITANCE OF THE CABLE\r(WIRE TO WIRE) SHALL NOT EXCEED 46pF/m AT 1.5 MHz. CAPACITIVE UNBALANCE TO THE SHIELD\rSHALL NOT EXCEED 1.5pF/M AT 1.5MHz. WHEREVER TWO PAIRS OF WIRE ARE CARRIED IN THE\rSAME CABLE, THE SIGNAL REJECTION FROM ONE PAIR TO ANOTHER SHALL BE SUPERIOR TO 45 dB\rIN THE RANGE FROM 0.75 MHz TO 3 MHz. TRANSFER IMPEDENCE OF THE CABLE SHALL BE LESS\rTHAN 0.020 OHM/M AT 20 MHz. VOLTAGE RATING: 300 V TEST VOLTAGE : 2000 V TEMPERATURE\rRANGE: -40 DEG C TO 90 DEG C. NOMINAL CABLE SIZE(n x SQMM) : 1 x 2 x 0.5 + 1 x 0.5 CONDUCTOR:\rSTRANDED, TIN PLATED COPPER TO BS 6360, FLEXIBLE INSULATION: DUAL WALL INSULATION,\rHALOGEN FREE, FLAME RETARDANT TO IEC 60332-3 (CAT-A) & FIRE RESISTANT TO IEC 60331\rSCREEN: TIN PLATED COPPER BRAID. GENERAL PROPERTIES: EXCELLENT HIGH TEMPERATURE,\rLOW TEMPERATURE, OZONE AND WEATHERING RESISTANCE, ZERO HALOGEN, FLAME\rRETARDANT, SOLDER IRON RESISTANT EASILY STRIPPABLE, FLEXIBLE EXCELLENT SCREENING\rPROPERTIES.
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