What is porcelain Disc insulator?
 
Porcelain disc insulator also can be called porcelain suspension insulator or suspension disc insulator. Porcelain disc insulator is the most popular used type of porcelain insulators. Since disc insualtor can be assembled one by one, which can constitute insualtor string suit for any voltage class, such as from 11kv to 1100kV. And for the fittings of disc insulator, normal used types are socket, ball, clevis and tongue. It can be constrituted by any both of these types.

ANSI standard disc Insulator types:

ANSI 52-1, ANSI 52-2, ANSI 52-3, ANSI 52-4, ANSI 52-5, ANSI 52-6, ANSI 52-8, ANSI 52-9A

IEC standard disc Insulator types:

U70BS, U70BL, U70C, U100BL, U120B, U160BS, U300B, U530B, XHP-70, XHP-120

Porcelain Disc Insulator Picture:
ANSI standard Porcelain Disc Insulator types:

Type No. ANSI 52-1 ANSI 52-2 ANSI 52-3 ANSI 52-4 ANSI 52-5 ANSI 52-6 ANSI 52-8 ANSI 52-9A
Section length - H:mm 140 146 146 146 146 146 146 159
Diameter - D:mm 165 190.5 254 254 254 254 280 114
Creepage distance - mm 178 210 292 292 292 292 280 171
Dry flashover voltage - kV 60 65 80 80 80 80 80 60
Wet flashover voltage - kV 30 35 50 50 50 50 50 30
Critical Impulse flashover Pos. - kV 100 115 125 125 125 125 125 110
Critical Impulse flashover Neg. - kV 100 115 125 130 130 130 130 90
Low frequency puncture voltage - kV 80 90 110 110 110 110 110 80
Rated E&M failing load - kN 44 70 70 70 111 111 160 44
Impact strength - N-m 5 5.5 6 6 7 7 10 5
Test voltage to ground - kV 7.5 7.5 10 10 10 10 10 7.5
Max RIV at 1000kHz - µV 50 50 50 50 50 50 50 50

IEC standard Porcelain Disc Insulator types:

Type No. U70BS U70BL U70C U100BL U120B U160BS XHP-70 XHP-120
Section length - H:mm 127 146 146 146 146 146 146 146
Diameter - D:mm 255 255 255 255 255 280 255 255
Creepage distance - mm 295 295 295 295 295 320 432 432
Powe frequency wet withstand voltage - kV 40 40 40 40 40 40 42 42
Lightning Impulse withstand voltage - kV 100 100 100 100 100 100 120 120
Power frequency puncture voltage - kV 110 110 110 110 110 110 120 120
Rated E&M failing load - kN 70 70 70 100 120 150 70 120
Impact strength - N-m 6 6 6 7 7 10 5.6 7
Test voltage to ground - kV 10 10 10 10 10 10 10 10
Max RIV at 1000kHz - µV 50 50 50 50 50 50 50 50