EN 61071:2007

FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Service conditions
  4.1 Normal service conditions
  4.2 Unusual service conditions
5 Quality requirements and tests
  5.1 Test requirements
  5.2 Classification of tests
  5.3 Capacitance and tan delta measurements (routine test)
  5.4 Measurement of the tangent of the loss angle (tan delta)
       of a capacitor (type test)
  5.5 Voltage test between terminals
  5.6 AC voltage test between terminals and case
  5.7 Test of internal discharge device
  5.8 Sealing test
  5.9 Surge discharge test
  5.10 Thermal stability test
  5.11 Self-healing test
  5.12 Resonance frequency measurement
  5.13 Environmental testing
  5.14 Mechanical testing
  5.15 Endurance test
  5.16 Destruction test
  5.17 Disconnecting test on internal fuses
6 Overloads
  6.1 Maximum permissible voltages
7 Safety requirements
  7.1 Discharge device
  7.2 Case connections
  7.3 Protection of the environment
  7.4 Other safety requirements
8 Markings
  8.1 Marking of the units
9 Guide to installation and operation
  9.1 General
  9.2 Choice of rated voltage
  9.3 Operating temperature
  9.4 Special service conditions
  9.5 Overvoltages
  9.6 Overcurrents
  9.7 Switching and protective devices
  9.8 Choice of creepage distance and clearance
  9.9 Connections
  9.10 Parallel connections of capacitors
  9.11 Series connections of capacitors
  9.12 Magnetic losses and eddy currents
  9.13 Guide for internal fuse and disconnector protection in
       capacitors
  9.14 Guide for unprotected capacitors
Annex A (informative) Waveforms
Annex B (normative) Operational limits of capacitors with
        sinusoidal voltages as a function of frequency and
        at maximum temperature (theta[max])
Annex C (normative) Resonance frequency measuring methods -
        Examples
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Bibliography

This International Standard applies to capacitors for power electronics applications. The operating frequency of the systems in which these capacitors are used is usually up to 15kHz, while the pulse frequencies may be up to 5 to 10 times the operating frequency. The standard distinguishes between a.c. and d.c. capacitors which are considered as components when mounted in enclosures. This standard covers an extremely wide range of capacitor technologies for numerous applications, e.g. overvoltage protection, d.c. and a.c. filtering, switching circuits, d.c. energy storage, auxiliary inverters, etc.