Applications
Instantaneous Electric Detonators in aluminium shell have wide range of applications in quarrying, opencast and underground non-gassy mine while copper coated steel shells have use in underground gassy mines.
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No.6 & No. 8 Strength |
No. 6 Strength |
1. |
Shell Material |
Aluminium |
Copper Coated Steel Shell |
2. |
Shell Length |
37 mm & 47 mm respectively |
37 mm |
3. |
Strength |
No. 6 & No. 8 |
No. 6 |
4. |
Legwire Colour |
Dark Green / Pink |
Dark Green / Pink |
5. |
Legwire Material |
Steel/Tinned Copper Wires |
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6. |
Barewire Diameter |
Steel Wire: 24 SWG (0.56 +- 0.02 mm) Tinned Copper Wire: 23 SWG (0.60 +- 0.02 mm)/25 SWG |
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7. |
Legwire Resistance |
Steel Wire: 0.55 +-0.15 Ohms./Metre Copper Wire: 0.05 to 0.06 Ohms./Metre |
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8. |
Standard Wire Lengths Available On Request |
1.8 m, 3.0 m, 4.0 m, 4.5 m, Specific Lengths |
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9 |
Fuse-Head Characteristics |
Resistance: 1.6 to 2.0 Ohms. Firing Impulse: 3.2 milliwatt secs per Ohm. Minimum Firing: 1.2 Amps. Applied for 30 seconds |
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On special request, Instantaneous Electric Detonators having the following firing characteristics can be supplied:
| Characteristic / Type |
Moderately Insensitive
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Medium Insensitive
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High Insensitive |
Fuse Head Resistance |
0.9 to 1.2 Ohms |
0.4 to 0.5 Ohms |
0.03 to 0.04 Ohms |
Firing Impulse |
4 mw seconds/Ohm |
34 mw seconds/Ohm |
300 mw seconds/Ohm |
"No Fire" Current |
0.300 Amps. applied for 300 seconds |
0.700 Amps. applied for 300 seconds |
4.0 Amps. applied for 300 seconds |
Minimum Firing Current Per Detonator |
0.5 Amperes
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1.0 Amperes
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7.0 Amperes
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Packing
25 Detonators are made into a bundle ensuring that all detonators and shunted ends are within the bundle. Two such bundles are wrapped in kraft paper to make a packet. Such packets are placed in a case lined with waterproof liners. Quantity per case depends on legwire length.
| Wire Length |
No. of Packets
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Quantity / Case
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|
20 |
1000 pcs |
|
Firing Impulse |
16 |
800 pcs |
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|
10 |
500 pcs |
For longer lengths, quantity/case shall vary depending on legwire length.
http://www.gulfoilcorp.com/products/idl/instantdetonators.html