Pipeline protection Device

GOST 14254, GOST R 51992

Features

Draining of alternating current induced in underground metal structures due to the effect of electromagnetic emission from high voltage transmission lines and other high voltage sources.

Application

Areas of hazardous effect of high voltage transmission lines on pipeline, namely:

  • — in case of parallelism of pipeline and high voltage transmission line;
  • — in places of intersection between pipeline and high voltage transmission line;
  • — in places of convergence (divergence) of pipeline and high voltage transmission line.

The device flowchart if shown in fig. 1.

Specification

No.Parameter description40А80А
1 Maximum permissible DC operating voltage in pipeline, V 15 15
2 Nominal drainage current 50 Hz, А 40 80
3 Peak pulse current, А 206 412
4 Maximum direct drainage current at maximum permissible DC operating voltage in pipeline, 15 V, mA ≤1 ≤1
5 Ingress protection rating IР34 IР34
6 Weight, kg, maximum 20 45
7 Impedance, Ohm, maximum 0,6 0,3
8 DC breakdown voltage, V 400÷750 400÷750
9 AC breakdown voltage (50 Hz), above, V 500 500
10 Pulse breakdown voltage at steepness 5 kV/µs, below, V 1,500 1,500
11 Nominal discharge current 8/20 µs, kA 75 75
12 Maximum discharge current 8/20 µs, kA 150 150
13 Pulse current (10/350), kA 100 100
14 Specific energy, kJ/Ohm 2,500 2,500
15 Insulation resistance, GOhm, minimum 1 1

General view

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