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LINE POST INSULATORS
 

POST INSULATORS

STANDARD PARTICULARS FOR VERTICAL TIE-TOP TYPE
ANSI Class 57-1 57-2 57-3 57-4 57-5
Figure Number 1 2 3 4 5
Creepage Distance mm 356 559 737 1016 1143
Dry Arcing Distance mm 165 241 311 368 438
Cantilever Strength kN 12.5 12.5 12.5 12.5 12.5
Low Frequency
Flashover Voltage
Dry kV 70 100 125 140 160
Wet kV 50 70 95 110 130
Critical Impulse
Flashover Voltage
Positive kV 120 160 200 230 265
Negative kV 155 205 260 340 380
R.I.V. Low Frequecny Test
Voltage RMS to ground
kV 15 22 30 44 44
Max RIV at 1 MHz µV 100 100 200 200 200
Net Weight(Approx.) kg 5.2 9.0 11.0 15.0 18.0
Applicable Specifications: ANSI C29.7 & ANSI C29.1

STANDARD PARTICULARS FOR VERTICAL CLAMP TOP TYPE
ANSI Class 57-11 57-12 57-13 57-14 57-15
Figure Number 6 7 8 9 10
Creepage Distance mm 356 559 737 1016 1143
Dry Arcing Distance mm 165 241 311 368 438
Cantilever Strength kN 12.5 12.5 12.5 12.5 12.5
Low Frequency
Flashover Voltage
Dry kV 70 100 125 140 160
Wet kV 50 70 95 110 130
Critical Impulse
Flashover Voltage
Positive kV 120 160 200 230 265
Negative kV 155 205 260 340 380
R.I.V. Low Frequecny Test
Voltage RMS to ground
kV 15 22 30 44 44
Max RIV at 1 MHz µV 100 100 200 200 200
Net Weight(Approx.) kg 6.8 10.0 11.8 15.9 18.6
Applicable Specifications: ANSI C29.7 & ANSI C29.1

STANDARD PARTICULARS FOR HORIZONTAL CLAMP TOP-CUP TYPE
ANSI Class 57-21 57-22 57-23 57-24 57-25
Figure Number 11 12 13 14 15
Creepage Distance mm 356 559 737 1016 1143
Dry Arcing Distance mm 165 241 311 368 438
Cantilever Strength kN 12.5 12.5 12.5 12.5 12.5
Low Frequency
Flashover Voltage
Dry kV 70 100 125 140 160
Wet kV 50 70 95 110 130
Critical Impulse
Flashover Voltage
Positive kV 120 160 200 230 265
Negative kV 155 205 260 340 380
R.I.V. Low Frequecny Test
Voltage RMS to ground
kV 15 22 30 44 44
Max RIV at 1 MHz µV 100 100 200 200 200
Net Weight(Approx.) kg 7.5 10.5 12.7 16.8 19.5
Applicable Specifications: ANSI C29.7 & ANSI C29.1

STANDARD PARTICULARS FOR HORIZONTAL CLAMP TOP GAIN BASE TYPE
ANSI Class 57-31 57-32 57-33 57-34 57-35
Figure Number 16 17 18 19 20
Creepage Distance mm 356 559 737 1016 1143
Dry Arcing Distance mm 165 241 311 368 438
Cantilever Strength kN 12.5 12.5 12.5 12.5 12.5
Low Frequency
Flashover Voltage
Dry kV 70 100 125 140 160
Wet kV 50 70 95 110 130
Critical Impulse
Flashover Voltage
Positive kV 120 160 200 230 265
Negative kV 155 205 260 340 380
R.I.V. Low Frequecny Test
Voltage RMS to ground
kV 15 22 30 44 44
Max RIV at 1 MHz µV 100 100 200 200 200
Net Weight(Approx.) kg 9.5 12.5 15.7 18.8 21.5
Applicable Specifications: ANSI C29.7 & ANSI C29.1

 
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