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Instantaneous Electric Detonators
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
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No. 6 Strength
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1. |
Shell Material
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Aluminium
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Copper Coated Steel Shell
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2. |
Shell Length |
37 mm & 47 mm respectively
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37 mm
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3. |
Strength
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No. 6 & No. 8
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No. 6
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4. |
Legwire Colour
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Dark Green / Pink
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Dark Green / Pink
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5. |
Legwire Material
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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
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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
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Moderately Insensitive
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Medium Insensitive
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High Insensitive
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Fuse Head Resistance
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0.9 to 1.2 Ohms
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0.4 to 0.5 Ohms
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0.03 to 0.04 Ohms
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Firing Impulse |
4 mw seconds/Ohm
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34 mw seconds/Ohm
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300 mw seconds/Ohm
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"No Fire" Current |
0.300 Amps. applied for 300 seconds
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0.700 Amps. applied for 300 seconds
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4.0 Amps. applied for 300 seconds
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Minimum Firing Current Per Detonator
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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
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No. of Packets
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Quantity / Case
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1.8 m, 2.0 m
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20
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1000 pcs
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Firing Impulse
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16
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800 pcs
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"No Fire" Current
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10
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500 pcs
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For longer lengths, quantity/case shall vary depending on
legwire length.
- Case dimensions (external): 540 x 318 x 286 mm (Vol. 0.049
CBM)
- Case marking provide for indicating legwire length and
wire material.
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