Electromagnetic compatibility (EMC) - Part 2: Environment - Section 2: Compatibility levels for low-frequency conducted disturbances and signalling in public low-voltage power supply systems
This National Standard of Canada is based on International Standard CEI/IEC 1000-2-2:1990. 1 Scope This section of IEC 1000-2 is concerned with conducted disturbances in the
frequency range up to 10 kHz with an extension for mains signalling systems.
This section gives numerical compatibility levels for low voltage a.c.
distribution systems with a nominal voltage up to 347 V, single-phase or 600 V,
three-phase and a nominal frequency of 50 Hz or 60 Hz. This section does not deal with the application of compatibility levels to
assess, for example, the permissible interference emission from specific items
of equipment or installations, because other system parameters, such as its
impedance as a function of frequency, have also to be considered. Furthermore,
it does not anticipate the specification of immunity levels by the individual
committees but merely provides guidance. The disturbance phenomena considered are: - harmonics; - inter-harmonics; - voltage fluctuations; - voltage dips and short supply interruptions; - voltage unbalance; - mains signalling; - power frequency variation; - d.c. components. The object of this section is to give information on the levels of disturbances
of various types that can be expected in public low-voltage power supply
systems for the guidance of: a) experts and power supply authorities setting limits for disturbance
emission in power systems; b) IEC product committees specifying the immunity levels of equipment
to public power system disturbances.