Electric detonators safety for the coal industry
ED-U-N - normal sensitivity to current, ED-U-P - the lowered sensitivity to current. Electric detonators are intended for conducting blasting operations in the coal mines dangerous on gas and (or) a dust, at temperature from a minus 50°C up to plus 50°C. Identification of series of delay is made by marking of the label fixed on lead wires. The length of lead wires is 2700 mm. Length of lead wires under the application of the consumer is possible. Material of the thread - copper, diameter of the thread - 0,5 or 0,6 mm. Material of a shell: steel with tombac coating. It is delivered in boxes in the size: 546 x 507 x 346 mm. Into one box it is packed 1008 pieces ED with length of lead wires of 2700 mm. Number of the UN 0030, the classification code 1.1B.
The quantity blasted ED with length of lead wires of 2700 mm at consecutive connection depending on resistance of main wires and type of a blasting device or the machine is indicated in the table.
Parameters ED-U-N and ED-U-P
| Number of a series |
Time of delay, ms |
| 0 |
5 |
| 1 |
40 |
| 2 |
70 |
| 3 |
100 |
| 4 |
130 |
| 5 |
160 |
| 6 |
195 |
| 7 |
230 |
| 8 |
265 |
| 9 |
300 |
| Type of the device |
Limiting resistance of blasted circuit, Ohm |
Quantitty of electric detonators |
| PIV-100, KVP-1/100 |
110 |
70 |
| KVP-2/200 |
290 |
190 |
| GZ-2460 (3 mode) |
200 |
130 |
| KPM-3 |
270 |
180 |