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Firing wires

СПП-1, СПП-2

DESIGNATION

Firing wires with copper conductors in polyethylene insulation are designed for transmission of direct voltage impulses up to 1000 V or alternating voltage up to 380 V at 50 Hz frequency.

Wire models and their definitions shall correspond to the details given in the table below:

Model

Definition

СПП-1

Firingwirewith polyethylene insulation

СПП-2

Two-conductor firingwire with polyethylene insulation

Number and rated areas of conductors, rated insulationthickness, maximal outer wire diameter and wire weight shall correspond to the details given in the table below:

Number of conductors

Rated conductorarea, mm2

Rated insulationthickness

Maximal outer diameter

Weightof 1 kmofwire, kg, not more

mm

 

1

0.5

0.65

2.3

8.0

2

4.6

16.5

ARRANGEMENT

 

CONDUCTOR:copper, stranded.

INSULATION: polyethylene compound.

STRAND:conductors are stranded with a strand pitch of not more than100 mm.

TECHNICALSPECIFICATIONS

After three-hour immersion in water,wires shall pass 5 minutes' voltage test of:

- 2000 V of alternating voltage at 50 Hz frequency or 5000 V of direct voltage - when being approved and supplied;

- 1000 V of alternating voltage at 50 Hz frequency or 3000 V of direct voltage - through the whole storing period.

Direct-current electrical resistance of conductors for a temperature of +20°С and a length of 1 km shall be:

- notmorethan39.5Ωforsingle-conductor wire;

- notmorethan41.0Ωfortwo-conductor wire.

Breaking tension of wires shall be not less than:

- 225 N (23 kgf) - forsingle-conductor wire;

- 441N (45kgf) - fortwo-conductor wire.

Wire insulation shall be resistant to static loads at a temperature of +65°С.

Factorylengthshallbe:

- not less than 200 m forsingle-conductor wire;

- 520+/-20m fortwo-conductor wire.

Regulations: GOST2190-77