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Porcelain Suspension Insulator
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Description:

Disc suspension insulator is an assembly of one or more shells with metallic fittings. They are nonrigid supporting type. It can be divided into ball & socket type and clevis & tongue type. This structure enables them form the insulator string by fitting into themselves one another as per voltage requirement. A suspension insulator set complete with the fittings is used to carry a line conductor or conductors at its lower end. The top is fixed to the crossarm of the tower.

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Porcelain Suspension Insulator

◆ The head portion of ball pin and cap are suitably designed so that when the insulator is under tension the stress are uniformly distributed as compression over the pin hole portion of the shell
◆ Disc insulator is designed, manufactured and tested in accordance with insulator standard / insulator specification
◆ Disc insulator and insulator end fittings come in contact with cement
◆ Usually made from porcelain material
◆ Normally used on transmission power lines
Disc insulator can be designed in accordance with ANSI C29.2 and IEC 60383 standards, the code number of Disc insulator

52-1 52-2 52-3 52-4 52-5 52-6 52-8 52-9A 52-9B 52-10
Main dimension(mm) D 165 190.5 254 254 254 254 280 114 133 280
H 140 146 146 146 146 146 146 159 159 165
Leakage distance/mm 178 210 292 292 292 292 280 171 171 280
Power frequency puncture voltage kV 80 90 110 110 110 110 110 80 80 110
Power frequency-Dry/kV 60 65 80 80 80 80 80 60 60 80
Power frequency-Wet/kV 30 35 50 50 50 50 50 30 30 50
Critical impulse-Positive/kV 100 115 125 125 125 125 125 110 110 125
Critical impulse-negative/kV 100 115 130 130 130 130 130 90 90 130
Radio influence voltage-test voltage to ground/kV 7.5 7.5 10 10 10 10 10 7.5 7.5 10
Radio influence voltage-maximum RIV at 1000Hz-uV 50 50 50 50 50 50 50 50 50 50
Rated E & M failing load/kN 44 70 70 70 111 111 160 44 44 160
Tension proof load/kN 22 35 35 35 55.5 55.5 80 22 22 80
Impact strength/N.m 5 5.5 6 6 7 7 10 5 5 10


 

 

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