ลูกถ้วยหลักก้านตรงรับสายไฟฟ้า :
พอร์ซเลน แบบ 56 / 57-2

TIS.2623 Part 7(2)-2564 Type 56/57-2
DIMENSIONS
Leakage distance, minimum, mm 534
Protected leakage distance, minimum, mm 267
MECHANICAL VALUES
Cantilever strength, kN 12.5
Cantilever proof load, kN 5
ELECTRICAL VALUES
Low-frequency dry flashover, kV 110
Low-frequency wet flashover, kV 80
Critical- impulse flashover, positive, kV 180
Critical- impulse flashover, negative, kV 205
RADIO INFLUENCE VOLTAGE DATA
Low-frequency test voltage, rms to ground, kV 22
Maximum RIV at 1000 kHz, microvolts 100
Colour of Insulator BROWN
Weight of Insulator, kg 8.7