Fibre shield safety fuse

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Fibre shield safety fuse is a delay device in the blasting circuit. It is initiated with the blast ejector and creates the thermal pulse igniting the plain detonating tube No.8.

TECHNICAL SPECIFICATION

– Appearance:	White
– Wire diameter, m:	(5,5÷6,0).10^-3
– Diameter of charge core, m:	≥ 2,5.10^-3
– Length of wire roll, m:	50^+1,0
– Firing velocity at normal condition, s:
+ 1 m length:	100÷117
+ 0,6 m length:	60÷70
+ 5 cm length:	5,0÷7,8
– Blast ejecting power (reliable priming distance), m:	40.10^-3
– Humidity resistance:	Function still ensured after 2 hour immersing into water in 0,5 m depth.