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Outdoor solid core post insulators

Outdoor solid core post insulators are main electrical insulators designed in different sizes and used in substations or transformers, can be made of porcelain or silicone rubber material.

Outdoor solid core post insulators

The insulators performance of a post insulator column is a function of the height, creepage distance, arcing distance of the insulating part(s) as well as the number of insulator units for a defined height and follows the standards IEC60071 and IEC60273

Outdoor solid core post insulators main dimensions

Nominal system voltage Un Highest system voltage Um One minute withstand voltage wet 50 cs Lightning impulse withstand voltage 1.2/50 μs
KV(r.m.s) kV (r.m.s) kV  (r.m.s) kV (peak value)
3 3.6 10 20,40
6 7.2 20 40,60
10 12 28 60,75,95
15 17.5 38 75,95
20 24 50 95,125,145
30 36 70 145,170
45 52 95 250
66 72.5 140 325
110 123 185 -230 450,550
132 145 185 -230-325 450,550,650
150 170 230-275-325 550,650,750
220 245 275,325,360,395,460 650,750,850,950,1050

Outdoor solid core post insulators main dimensions

Nominal system voltage Un Highest system voltage Um Switching impulse withstand voltage 250/2500μs Lightning impulse withstand voltage 1.2/50 μs
KV(r.m.s) kV (r.m.s) kV  (r.m.s) kV (peak value)
275 300 750,850 850,950,1050
330 362 850,950 950,1050,1175
380 420 850,950,1050 1050,1175,1300,1425
480 525(550) 850,950,1050 1175,1300,1425,1550
700 765(800) 1300,1425,1550 1675,1800,1950,2100

Outdoor solid core post insulators are divided into station post insulators and line post insulators used in transmission and distribution systems.

 

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