ELECTROEXPLOSIVE NETWORK Russian patent published in 1994 - IPC

FIELD: blasting practice. SUBSTANCE: electric detonators 1 are insulated from outside interferences by using transformer protection units 2 rigidly coupled with shell of electric detonators. Protection units 2 and electric detonators are located in fuse together with charge 4. Connecting wire 3 extends through holes of all units 2. Full inductance of incandescence bridge of electric detonator is less than 1.03 the inductance of secondary winding of protective unit, whose ratio, in turn, to the inductance of a portion of connecting wire at point of connection to unit 2 of the electric detonator is not more than 1. EFFECT: increased reliability. 1 dwg