12.5kn 55kv Line Post Porcelain Insulator 57-4

Model NO.
57-4
Type
A Type Insulator
Usage
High Voltage Power Transmission, Insulation, Electrical Installation
Size of Bearing Capacity
12.5kn
Certification
ISO9001
Color
White
Net Weight
16kg
Transport Package
1000*1000*1000mm
Trademark
JOHNSON
Origin
China
HS Code
854620909
Production Capacity
100000
Reference Price
$ 3.31 - 4.32
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Product Description

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Product Description

12.5kn 55kv Line Post Porcelain Insulator 57-4

 

Detailed Photos

12.5kn 55kv Line Post Porcelain Insulator 57-4
12.5kn 55kv Line Post Porcelain Insulator 57-4
12.5kn 55kv Line Post Porcelain Insulator 57-4
Line post type porcelain insulators
ANSI Class   57-1 57-2 57-3 57-4 57-5
Dimensions
Creepage distance mm 356 559 737 1015 1145
Dry arcing distance mm 165 241 311 368 438
Mechanical Values
Cantilever strength kn 12.5 12.5 12.5 12.5 12.5
Cantilever strength routine test kn 5 5 5 5 5
Electrical Values
Type application voltage kv 25 35 45 55 66
Low frequency dry flashover voltage kv 80 110 125 150 175
Low frequency wet flashover voltage kv 60 85 100 125 150
Critical impulse flashover voltage,positive kv 130 180 210 255 290
Critical impulse flashover voltage,negative kv 155 205 260 340 380
Radio influence Voltage Data
Test voltage RMS to ground kv 15 22 30 44 44
Maximum RIV at 1000kHz μv 100 100 200 200 200
Packing and Shipping Data
Net weight,approximate kg 5.2  9.0  11.0  16.0  18.0 

 

Insulator