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Rated Voltage: 10KV-220 KV
Application: High Voltage
Material: Porcelain
Type: Insulator
Model Number: Porcelain Line Post Insulator
Brand Name: JUNAI
Place of Origin: China (Mainland)
COLOR: BROWN

Specifications

Porcelain Line post insulator can be divided into horizontal line posts and vertical line posts according to insulator connectivity way, used for 6kV to 132kV transmission and distribution power lines. Porcelain Line post insulator made of porcelain materials, called line post porcelain insulator which installed with insulator stud. Line post insulator stud can be divided into long insulator stud and short insulator stud. Same dimension of the fittings as porcelain pin insulator, so they can be exchanged.

Orient Power is a professional insulator manufacturer in China, also produces other specification line post insulator, you can read and download the porcelain line post insulator to learn more.


ANSI ceramic line post Insulators
1. ANSI 57-1, 57-2… series ceramic line post insulators drawings, technical data and images show as follows:

High Voltage Porcelain Line Post Insulator for Overhead Power Transmission Line
Type
Fig NO. 1 2 3 4 5 5
Leakage distance mm 356 559 737 1016 1143 1346
Dry arcing distance mm 165 241 311 368 438 489
Cantilever strength kN 12.5 12.5 12.5 12.5 12.5 12.5
Power frequency flashover voltage Dry KV 70 100 125 140 160 180
Wet KV 50 70 95 110 130 150
Critical impulse flashover voltage Positive KV 120 160 200 230 265 300
Negative KV 155 205 260 340 380
Radio interference voltage Test voltage to ground KV 15 22 30 44 44 44
Max. RIV at 1 MHz μV 100 100 200 200 200 200

2. ANSI 57-12, 57-13… series ceramic line post insulators drawings, technical data and images show as follows:


High Voltage Porcelain Line Post Insulator for Overhead Power Transmission Line
Type
Fig NO. 1 2 3 4 5 5
Creepage distance mm 356 559 737 1016 1143 1346
Dry arcing distance mm 165 241 311 368 438 489
Cantilever strength KN 12.5 12.5 12.5 12.5 12.5 12.5
Power frequency flashover voltage Dry KV 70 100 125 140 160 180
Wet KV 50 70 95 110 130 150
Critical impulse flashover voltage Positive KV 120 160 200 230 265 300
Negative KV 155 205 260 340 380
Radio interference voltage Test voltage to ground KV 15 22 30 44 44 44
Max. RIV at 1 MHz μV 100 100 200 200 200 200

3. ANSI 57-21, 57-22… series ceramic line post insulators drawings, technical data and images show as follows:
High Voltage Porcelain Line Post Insulator for Overhead Power Transmission Line

Type
Fig No. 1 2 3 4 5 5
Creepage distance mm 356 559 737 1016 1143 1346
Dry arcing distance mm 165 241 311 368 438 489
Cantilever strength KN 12.5 12.5 12.5 12.5 12.5 12.5
Power frequency flashover voltage Dry KV 70 100 125 140 160 180
Wet KV 50 70 95 110 130 150
Critical impulse flashover voltage Positive KV 120 160 200 230 265 300
Negative KV 155 205 260 340 380
Radio interference voltage Test voltage to ground KV 15 22 30 44 44 44
Max. RIV at 1 MHz μV 100 100 200 200 200 200

4. ANSI 57-31, 57-32… series ceramic line post insulators drawings, technical data and images show as follow:


High Voltage Porcelain Line Post Insulator for Overhead Power Transmission Line

Type
Creepage distance mm 356 559 737 1016 1143 1346
Dry arcing distance mm 165 241 311 368 438 489
Cantilever strength KN 12.5 12.5 12.5 12.5 12.5 12.5
Power frequency flashover voltage Dry KV 70 100 125 140 160 180
Wet KV 50 70 95 110 130 150
Critical impulse flashover voltage Positive KV 120 160 200 230 265 300
Negative KV 155 205 260 340 380
Radio interference voltage Test voltage to ground KV 15 22 30 44 44 44
Max. RIV at 1 MHz μV 100 100 200 200 200 200

Africa porcelain line post type Insulators
1. Capless line post insulator, the main technical parameters:
High Voltage Porcelain Line Post Insulator for Overhead Power Transmission Line
Type:
Nominal voltage KV 22 22 22 33 33 33
Nominal creepage distance mm 630 750 750 900 1120 1120
Bottom fixing diameter mm M20 OVERSIZE M20 OVERSIZE M20 OVERSIZE M20 OVERSIZE M20 OVERSIZE M20 OVERSIZE
Top fixing diameter mm 73 73 73 73 73 73
Top groove radius mm 20 20 20 20 20 20
Cantilever strength KN 4 4 10 6 10 4
Dry arcing distance mm 290 325 325 389 390 415
Power frequency flashover dry KV 124 109 111 161 105.7 137.1
Power frequency flashover wet KV 84 86 85 123 86.4 101.1
Power frequency withstand dry KV 121 106 106 146 96 131.1
Power frequency withstand wet KV 76 72 69 85 76 88.4
Impulse withstand voltage (bil) KV 183 184 186 230 207 229.7
Impulse flashover positive KV 187 191 193 238 221.5 241.3
Impulse flashover negative KV 362 343 344 410 418.4 414.6

2. Capped line post insulator, the main technical parameters:

High Voltage Porcelain Line Post Insulator for Overhead Power Transmission Line
Type
Nominal voltage KV 11 11 12 33 33 33 33 33 33
Nominal creepage distance mm 300 405 400 786 1050 813 1100 900 1116
Bottom fixing diameter mm M20 M20 M20 M20 M20 M20 M20 M20 M20
Top fixing diameter mm 73 73 73 73 73 73 73 73 73
Top groove radius mm 12.5 25 12.5 25 25 20 20 25 25
Cantilever strengh KN 7 12.5 4 4 12.5 10 10 10 12.5
Dry arcing distance mm 160 170 218 320 390 335 425 368 432
Power frequency flashover dry KV 70 79.7 97 131 157 123 140 125 140
Power frequency flashover wet KV 40 43.7 65 87 106 87 91 95 110
Power frequency withstand dry KV 63 75.1 91 127 145.9 115 124 110 120
Power frequency withstand wet KV 35 38 57 75 87.6 72 82 78 90
Impulse withstand voltage (bil) KV 100 95 150 205 247 192 245 200 215
Impulse flashover positive KV 110 142.8 164 209 258.4 197 255 210 230
Impulse flashover negative KV 183 218.2 263 346 413.7 370 414 260 280

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