line post porcelain insulator ANSI 57 series

line postinsulator Cat.No. 0301 020 0301 025 0301 035 0301 045 0301 055 0301 066 0301 088 Usuallinevoltage/kV 20 25 35 45 55 66 88 ANSIClass _ 57-1 57-2 57-3 57-4 57-5 57-6 DesignationofNeck F F F F N N N Height”A”/in(mm) 7-1/2 (191) 8-3/4 (222) 12 (305) 14-1/2(369) 17 (432) 20 (508) 23 (584) Diameter”B”/in(mm) 5-1/2 (140) 5-3/4 (146) 5-3/4 (146) 6 (512) 7 (178) 7 (178) 7-5/16(185) Diameter”C”/in(mm) 3-3/4 (95) 4 (102) 4 (102) 4-1/2 (114) 5 (127) 5 (127) 5-1/2 (140) Thread”D”/in(mm) 3/4-10UNC 3/4-10UNC 3/4-10UNC 3/4-10UNC 3/4-10UNC 3/4-10UNC 7/8-9UNC Min.leakagedistance/in(mm) 11 (280) 14 (356) 22 (559) 29 (737) 40 (1015) 45 (1145) 53 (1345) Dryarcingdistance/in(mm) 5-3/4 (146) 6-1/2 (165) 9-1/2 (241) 12-1/4(311) 14-1/2(368) 17-1/4(438) 19-1/4(489) Cantileverstrength/lb(kN) 2000 (9) 2800 (12.5) 2800 (12.5) 2800 (12.5) 2800 (12.5) 2800 (12.5) 2800 (12.5) Averageflashover voltage LowFrequency Dry/kV 80 80 110 125 150 175 200 Wet/kV 55 60 85 100 125 150 170 CriticalImpulse Pos./kV 105 130 180 210 255 290 330 Neg./kV 130 155 205 260 340 380 425 Withstand voltage Lowfrequency Dry/kV 60 60 90 100 120 140 160 Wet/kV 40 45 65 80 100 120 135 Impulse/kV 85 110 150 170 200 235 250 Radio influencevoltagedata Testvoltage/kV 15 15 22 30 44 44 44 Max.RIV at1,000kHz/uV 50 100 100 200 200 200 200 Netweight/lb(kg) 8.5 (3.9) 11 (5) 17 (7.7) 22 (10) 36 (16) 46 (21) 51 (23)