High Voltage Insulator |
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Product Code | Creepage | D | L | d | A | B | C |
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MI 6075 (3.3 Kv) | 112 mm | 60 | 75 | 36 | M6 X 16 | M10 X 20 | M12 X 24 |
MI 6090 (6.6 Kv) | 140 mm | 60 | 90 | 36 | M6 X 16 | M10 X 20 | M12 X 24 |
MI 60130 (11 Kv) | 197 mm | 60 | 130 | 36 | M6 X 16 | M12 X 24 | M16 X 34 |
MI 75130 (11 Kv) | 197 mm | 75 | 130 | 45 | M10 X 20 | M16 X 34 | M20 X 36 |
MI 70210 (22 Kv) | 285 mm | 70 | 210 | 36 | M6 X 16 | M10 X 25 | M16 X 55 |
MI 80300 (33 Kv) | 440 mm | 80 | 300 | 36 | M6 X 16 | M10 X 25 | M16 X 75 |
Specification DMC/ SMC/ Epoxy Insolators | |||||
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Properties | Units | Test Methods (ASTM ) | |||
SMC | DMC | Epoxy | |||
PHYSICAL | |||||
Specific Gravity | D-792 | 1.7 | 1.9 | 1.6 - 2.0 | |
Glass Contents | % | N.A. | 25 | 15 | |
Water Absorption (24 hrs) | % | D-570 | 0.2 | 0.15 | .04 - 0.1 |
MECHANICAL | |||||
Tensile Strength | Kgf/Cm2 | D-638 | 700 | 400 | 750 - 400 |
Flexural Strength | Kgf/Cm2 | D-790 | 1550 | 900 | 800 |
Compressive Strength | Kgf/Cm2 | D-695 | 1800 | 1500 | 1600 |
Impact Strength Izod | J/m | D-265 | 600 | 250 | |
ELEKTRICAL | |||||
Dielectric Strength | KV/mm | D-149 | 12 | 10 | 13 |
Tracking Index | Volts | BS-5901 | + 600 | + 600 | + 600 |
ARC Resistance | Secs. | D-495 | + 180 | + 180 | + 180 |
Flammability | self Extinguishing |
TOLERANCE CHART | ||
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mm | TOLERANCE ( � ) | |
1-15 | 0.25 mm | |
16-50 | 0.5 mm | ( SMC = Sheet Moulding Compound ) |
51-100 | 1.0 mm | ( DMC = Dough Moulding Compound ) |
101-250 | 1.5 mm | |
250 & above | 2 mm |
This information is applicable to following articles:
High Voltage Insulator MI, Polystyrol HEX knob IS and Polystyrol HEX knob ISS, ISK, ISD
Torque chart | |
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recommended values - indicative only | |
Bolt size | Grade 4,8 |
M | Torque Nm |
M4 | 1,5 |
M5 | 3,0 |
M6 | 5,1 |
M8 | 12 |
M10 | 25 |
M12 | 43 |
M14 | 68 |
M16 | 105 |
M18 | 145 |
M20 | 205 |
M22 | 275 |
M24 | 350 |
Recommended max. tightening torque in Nm for untreated oil-smeared screws. Friction coefficient µ=0.125, torque corresponds to approx. 62% of tensile bolt stress. Friction coefficient µ=0.14, torque corresponds to approx. 90% of tensile bolt stress. Every bolted joint is unique and the optimum tightening torque should be determined for each application by careful examination. A properly tightened bolt is one that is stretched such that it acts like a very ridged spring pulling mating surfaces together. The rotation of a bolt (torque) at some point causes it to stretch (tension). Several factors affect how much tension occurs when a given amount of tightening torque is applied.
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