NF EN 61642 : 1998

1 General
    1.1 Scope and object
    1.2 Normative references
    1.3 Definitions
    1.4 General considerations
          1.4.1 AC harmonics
          1.4.2 Reactive power
2 Resonance problems and solutions
    2.1 Introduction
    2.2 Supply impedance view, load-busbar impedance view
    2.3 Example of series resonance
    2.4 Example of parallel resonance
    2.5 Solutions to avoid resonances
          2.5.1 Capacitor-reactor connection: series resonance
          2.5.2 Capacitor-reactor connection: parallel
                  resonance
3 Shunt capacitors and filters for networks having a
    voltage up to and including 1 000 V
    3.1 Introduction
    3.2 Shunt capacitors
    3.3 Detuned filter
    3.4 Tuned filter
    3.5 Components selection
          3.5.1 Capacitors
          3.5.2 Reactors
          3.5.3 Contactors and/or circuit-breakers
          3.5.4 Short-circuit protection (fuses)
    3.6 Disturbance of ripple control installations by
          shunt capacitors and filters
          3.6.1 Shunt capacitors
          3.6.2 Detuned filter
          3.6.3 Tuned filter
4 Shunt capacitors and filters for networks having a voltage
    above 1 000 V
    4.1 Introduction
    4.2 Specific requirements
    4.3 Choice of power factor correction installation
    4.4 Type of filters
    4.5 Filter components selection
          4.5.1 Circuit-breaker
          4.5.2 Capacitors
          4.5.3 Reactors
          4.5.4 Resistors
          4.5.5 Relay protection
    4.6 Disturbance of ripple control installations by shunt
          capacitors and filters
Annex A Bibliography
Annex ZA Normative references to international publications
          with their corresponding European publication

Provides guidelines for use of passive a.c. harmonic filters and shunt capacitors for limiting harmonics and power factor correction intended for use in industrial applications, at low and high voltages. Applies to harmonic orders higher than 1 and not exceeding 25.