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SMC Aerial Fuse boards-Technical Specifications
PHYSICAL PROPERTIES
| Property |
Testing method |
Units |
Specified values |
Observed values |
| Density |
BS-2782-PART 5-509A |
Gm/cc |
1.70- 1.90 |
1.78 |
| Mould shrinkage |
BS-2782-PART 6-640A |
% |
0.15 – 0.20 |
0.18 |
| Glass content |
BS-5734-PART 1 |
% |
24 - 26 |
25.1 |
MECHANICAL STRENGTH
|
| Tensile strength |
BS-2782-PART 3-320E |
Kg./Sq.cm |
750 |
770 |
| Flexural strength |
BS-2782-PART 3-335A |
Kg./Sq.cm |
600 |
1,760 |
| Comp. strength |
BS-2782-PART 3-345A |
Kg./Sq.cm |
1800 |
2,096 |
| Impact strength |
BS-2782-PART 3-350 |
Kg./Sq.cm |
50 |
61.5 |
ELECTRICAL PROPERTY
|
| Vol. Resistivity |
DIN-53482 |
Log 10Ohm cm |
14 |
14 |
| Sur. Resistivity |
DIN-53482 |
Log 10 Ohm |
12 |
13 |
| Tracking index |
DIN-53480 |
volts |
+800 |
+800 |
| Di-Ele.strength |
BS-2782-PART 2-201C |
KV/mm |
12 |
12.7 |
| Arc Resistance |
ASTM-D 495 |
Second |
+180 |
186 |
THERMAL
|
| Martens H.D.T |
DIN-53462 |
°C |
+160 |
+160 |
| Flammablity |
UL-94 |
VO |
VO |
VO |
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