BS IEC 1000-2.5 : 1995

FOREWORD
Clause
1 General
      1.1 Scope and object
      1.2 Normative reference
      1.3 Approach
2 Definitions
      2.1 Annotated definitions on electromagnetic
            compatibility
      2.2 Acronyms
3 User's guide for this report
      3.1 Rationale for classification system
      3.2 Environmental phenomena
      3.3 Simplification of the environmental database
4 Low-frequency electromagnetic phenomena
      4.1 Conducted low-frequency phenomena
      4.2 Radiated low-frequency phenomena
5 High-frequency electromagnetic phenomena
      5.1 Conducted high-frequency phenomena
      5.2 Radiated high-frequency phenomena
6 Electrostatic discharge
      6.1 ESD currents
      6.2 Fields produced by ESD currents
7 Classification of environments
      7.1 Types of location
      7.2 Impinging disturbances and equipment ports
8 Principles of the selection of immunity levels
      8.1 Approach
      8.2 Uncertainties
      8.3 Criticality criteria
Tables
1 Principal phenomena causing electromagnetic
      disturbances
2 Range of disturbance degrees for harmonics in low-
      voltage power systems
3 Range of disturbance degrees for signalling
      voltages in power systems
4 Sources and range of disturbance degrees for
      voltage amplitude and frequency in power systems
5 Sources and range of disturbance degrees for low-
      frequency common-mode induced voltages in
      signal and control cables
6 Sources and range of disturbance degrees for low-
      frequency magnetic fields
7 Sources and range of disturbance degrees for low-
      frequency electric fields
8 Disturbance degrees of induced CW voltages with
      respect to reference ground
9 Sources and range of disturbance degrees for
      conducted unidirectional transients in low-
      voltage a.c. power systems
10 Sources and range of disturbance degrees for
      conducted oscillatory transients in low-
      voltage a.c. power systems
11 Sources and range of disturbance degrees for
      radiated oscillatory disturbances
12 Sources and range of disturbance degrees for
      radiated pulsed disturbances
13 Sources and range of disturbance degrees for ESD
14 Range of disturbance degrees for field gradients
      caused by ESD
A.1 Location class type 1
A.2 Location class type 2
A.3 Location class type 3
A.4 Location class type 4
A.5 Location class type 5
A.6 Location class type 6
A.7 Location class type 7
A.8 Location class type 8
B Typical waveforms for radiated oscillatory
         disturbances
Annexes
A Examples of compatibility levels for typical
      location classes
B Radiated oscillatory disturbances
C Radiated pulsed disturbances

A Technical report intended for guidance for those in charge of writing immunity standards for an equipment or system, the purpose being to classify electromagnetic environments and help to improve the specification of the immunity requirements of an item containing electrical or electronic parts, obtaining electromagnetic compatibility. Supplies basic guidance for the selection of immunity levels. Applicable to any equipment, subsystem or system using electromagnetic energy and operating in a specific location as defined by this report. Does not describe environment inside transportation equipment (vehicles, traction, ships and aircraft), but includes their effect on the surrounding environment.