Electromagnetic compatibility

In the course of measuring lines deployment based on devices of ZETSENSOR series it is important to maintain the operational state of data transfer line.

Industrial application sphere implies adverse electromagnetic operational conditions. Power surges caused by static shocks and other electromagnetic impacts may damage measuring tools.

Electrical interference poses a big threat for the data transfer line. There are two types of power surges:

  • Power surges caused by atmospherical factors

    power surges with short duration and large energy level

  • Power surges of industrial nature

    long-term surges with average values induced by inductive coupling within the data transfer line

Surge noises caused by environmental factors

Lightning is the most widely spread process that may lead to surge noise. A single lightning strike may damage a lot of network elements. There are two types of lightning strike impact:

  • direct strike;
  • inductive coupling – the lightning strikes into the ground and the energy is induced inside of the communication line without any direct contact.

Surge noises of industrial origin

As the electrical current passes through the conductive material, a magnetic field is formed. As the second conductor enters the magnetic field (in the case if the magnetiс field is alternating), a current is formed in it.

This is a brief explanation of how two remote wires can magnetically cause impulse interference.

Normal operation of devices in industrial environment implies their compliance to electromagnetical compatibility requirements. These requirements encompass three basic electromagnetic parameters: electrostatic discharge immunity (IEC 61000-4-2:2008), electrical fast transient immunity (IEC 61000-4-4: 2004) and surge immunity (IEC 61000-4-5-95).

Each of the above mentioned standards determines requirements and test procedures for electromagnetic immunity evaluation.

The standards outline various classes types depending on a particular device installation area. The table below shows maximum power values for each corresponding class:

Product versions Electrostatic discharge
contact/air, kV
Burst
power/signal, kV
Microsecond high energy pulse, V
Laboratory 4/8 0,5/0,25 500
Industrial 8/15 4/2 4000
Measuring line with line protection device 8/15 4/2 4000

There are three application options of ZETSENSOR series products that can be used in the course of measuring networks deployment:

ZETSENSOR в промышленном исполнении
Устройство защиты линий серии ZETSENSOR

ZETSENSOR – laboratory version 

ZETSENSOR – industrial option

 ZETSENSOR line protection device

The table below shows electromagnetic compatibility parameters for ZETSENSOR series devices depending on a particular product version:

Product version Electrostatic discharge
contact/air, kV
Burst
power/signal, kV
Microsecond high energy pulse, V
Laboratory 4/8 0,5/0,25 500
Industrial 8/15 4/2 4000
Measuring line with line protection device 8/15 4/2 4000