Heating Wires

PNSV Technical Specifications 16.Ê71-013-88

Heating wires with a steel conductor are intended for heating, at fixed assembly, of petroleum and gas industry plants, cast-in-situ concrete and reinforced concrete, as well as for floor heaters for the voltage up to 380 V AC, rated frequency of 50 Hz, or a direct current up to 1000 V.

PNZhV, PNZhP, PNNKhV Technical specifications of the Republic of Belarus 500017371.028-2003

Intended for heating of cast-in-situ concrete and reinforced concrete, as well as minor details of construction machines for the voltage of 380 V AC, rated frequency of 50 Hz, or a direct current up to 1000 V.

	Section, mm2
PNSV/PNZhV/PNZhP/PNNKhV	1õ1,0	1õ1,1	1õ1,2	1õ1,3	1õ1,4

Structure

- Conductor:
PNSV, PNSP, PNZhV, PNZhP: a steel wire
PNNKhV: wire made of precision alloys
- Insulation is made of:
PNSV: polyvinylchloride elastron
PNSP: polypropylene
PNZhV: polyvinylchloride elastron È40-13, È40-13À
PNZhP: low-density polyethylene
PNNKhV: polyvinylchloride elastron IT-105P-A

Technical Characteristics

- The climatic performance in accordance with GOST 15150-69:
PNSV: NF
PNZhV, PNZhP, PNNKhV: N, category of arrangement 1
- Service temperature range:
for PNSV: from -60°Ñ to +50°Ñ
for PNZhV: from -40°Ñ to +70°Ñ
for PNZhP: from -60°Ñ to +70°Ñ
for PNNKhV: from -40?Ñ to +105°Ñ
- Relative air humidity is up to 95% at a temperature of +35°Ñ
- Wiring should be made at a temperature not below -15°Ñ
- The operating mode of wires is intermittent duty or continuous duty
- The distance between wires must be not less than 15 mm
- At a temperature of 20°Ñ, the electrical resistance of conductors, recalculated for 1 km long, is not less than:
220 Ohm for PNSV 1,0; 190 Ohm for PNZhV, PNZhP, PNNKhV 1,0
1,1 - 180 1,1 - 155
1,2 - 120 1,2 - 130
1,3 - 140 1,3 - 110
1,4 - 110 1,4 - 95
- At a temperature of 20°Ñ, the electrical resistance of conductor insulation, recalculated for 1 km long, is not less than:
1 MOhm for PNSV
10 MOhm for PNZhV, PNNKhV
500 MOhm for PNZhP
- A factory length of cables is determined according to a length of a heating section at the operating voltage of 220 V and an ambient temperature of +20°Ñ and makes:
1,0 - 80 m
1,1 - 95m
1,2 - 110m
1,3 - 125m
1,4 - 140m
- A lifetime of wires is not less than 16 years from the date of production
- A guaranty service life is no more than 2 years from the date of putting cables into operation.