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 Standards
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EU standard 55014
(CISPR14)
As/NZ standard 1044
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Limits and methods of measurement of radio disturbance characteristics
of electrical motor operated and thermal appliances for household and
similar purposes, electric tools and similar electric apparatus.
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This standard applies to the
conduction and the radiation of radio frequency disturbances from appliances
whose main functions are performed by motors and switching or regulating
devices, unless RF energy is intentionally generated (EN55011) or intended
for illumination (EN55015). It includes such equipment as: household electrical
appliances, electric tools, regulating controls using semiconductor devices,
motor driven electro-medical apparatus, electric toys, automatic dispensing
machines as well as cine or slide projectors. Also included in this standard
are: - separate parts of the above mentioned equipment such as motors, switching
devices e.g. (power or protective) relays, however no emission requirements
apply unless formulated in this standard. Excluded from the scope of this
standard are:
- Lighting devices (EN55015)
- Audio and video equipment and electronic music instruments (EN55013)
- Mains communication devices
- Equipment using RF energy for heating or theraputic purposes (EN55011)
- Microwave ovens (EN55011)
- Information Technology Equipment e.g. computers. (EN55022)
- Equipment for use in motor vehicles. (EN55025)
- Controls and equipment with semiconductor regulating devices with
ratings > 25A.
- Stand alone power supplies.
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Radiated: Requires the use
of an RF Absorbing clamp to measure the level of RF energy transmitted from
the product back down the mains lead. Does NOT require any other antenna
or the use of open area test sites. Frequency range 30MHz to 300MHz. Conducted:
The RF conducted back down the mains lead is measured preferably with a
LISN (Line Impedance Stabilisation Network), or alternatively with a voltage
probe if a LISN is not suitable, and from other terminals with a voltage
probe. Frequency range 150KHz to 30MHz. The signals from the absorbing clamp,
LISN or voltage probe are all analysed in a CISPR16 EMC analyser.
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The complete basic kit to cover
both radiated and conducted emissions measurement in accordance with the
standard, including a 16A single phase LISN and RF400 absorbing clamp ...RFG-4A
A comprehensive range of alternative LISNs for up to 150A rating and 3 phases
are available. If applicable, a voltage probe can be supplied in place of
the LISN ...RFG-5A
Recommended option: RF910 pre-selector. Essential if the EUT generates broadband
noise (e.g. variable speed motors, motors with commutators, power controllers,
phase angle controllers) ...add -R |
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SA1000
EMC analyser
RF400 Absorbing clamp
LISN
Voltage probe (PLIP)
RF910 automatic pre-selector
RF800 Band B filter |
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Help in the selection of the
appropriate measurement techniques and automatic display of the relevant
limit levels are standard features in the software provided with all Laplace
EMC analysers. Note The above is for guidance only. Refer to the published
standard for definitive details, exclusions and exceptions and detailed
test technique. |
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LAPLACE INSTRUMENTS LTD
3B, Middlebrook Way,
Holt Road, Cromer,
Norfolk, NR27 9JR, UK
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Tel: + 44 (0)1263 515160
Fax: + 44 (0)1263 512532
E-mail:tech@laplace.co.uk
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