High Voltage Insulator |
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| Product Code | Creepage | D | L | d | A | B | C |
|---|---|---|---|---|---|---|---|
| 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 | |||||
|---|---|---|---|---|---|
| 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 | ||
|---|---|---|
| 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 | |
|---|---|
| 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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