environmental conditions for industrial areas - ieee...
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Environmental Conditions
for
Industrial Areas
Bob Lounsbury
IEEE RPTG
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Introduction
There are two sets of environmental conditions with respect to
Industrial spaces. One) Minimum Legal test limits and 2) Expected
conditions based on the MICE concept (Mechanical, Ingress,
Climatic/Chemical and Electromagnetic. In some cases these
environments have the same values.
The MICE concept was developed in coordination with
ISO/IEC/JTC1/SC25C/WG3 and ANSI/TIA/TR42. The MICE concept
provides for 3 classifications with increasing severity ranging from
commercial office environments to harsh industrial environments.
The source for the values contained in the MICE Technical report
(ISO/IEC/TR29106) were extracted from three IEC environmental
standards IEC60654-n, IEC60721 and IEC61000-n. The latter has a
direct link to the Minimum Legal Test Limits for Industrial
equipment.
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Minimum Legal Limits - Mechanical
Vibration
Displacement
amplitude15 mm, 2 Hz to 9 Hz - IEC60068-2-6, Test Fc
Acceleration
amplitude
50 ms-2, 9 Hz to 500
Hz
50 ms-2, 10 Hz to
500 HzIEC60068-2-6, Test Fc
Shock and bump
Peak acceleration 250 ms-2 300 ms-2 IEC 60068-2-27, Test Ea
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Ingress (not a legal requirement)
NEMA and
International
Protection Class
IP IP20 IP65 IP65/67
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MLL Cont. - Climatic
Temperature
and Humidity
Operational -25…85 °C 0…50 °CIEC60068-2-1/2, Test Ad/Bd
IEC60068-2-14, Test Nb
Non Operational -25…85 °C -40…85 °CIEC60068-2-1/2, Test Ab/Bb
IEC60068-2-14, Test Na
Humidity5 to 95 %
noncondensing
5 to 95 %
noncondensingIEC 60068-2-30, Test Db
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MLL Cont. - Electromagnetic
Emissions
Radiated
(enclosure)Class A, , 30 MHz to 6 GHz CISPR11/22
Conducted
(telecomm)
Class A, 150 kHz to 30
MHzCISPR22
Immunity
ESD Contact
discharge4kV HBM 4kV HBM IEC61000-4-2
ESD Air discharge 8kV HBM 8kV HBM IEC61000-4-2
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MLL Cont. - Electromagnetic
Immunity
Radiated RF
10Vm-1 (80...1000 MHz,
80% AM @ 1kHz)
3Vm-1 (1.4...2.0 GHz, 80%
AM @ 1kHz)
1Vm-1 (2.0...2.7 GHz, 80%
AM @ 1kHz)
10Vm-1 (80...1000 MHz,
80% AM @ 1kHz)
3Vm-1 (1.4...2.0 GHz, 80%
AM @ 1kHz)
1Vm-1 (2.0...2.7 GHz, 80%
AM @ 1kHz)
IEC61000-4-3
Conducted RF10VRMS (150 KHz...80
MHz, 80% AM @ 1kHz)
10VRMS (150 KHz...80
MHz, 80% AM @ 1kHz)IEC61000-4-6
EFT/B1KV1kV on signal ports
2kV on power portsIEC61000-4-4
Surge2KV
1kV CM on signal ports
2kV CM/1kV DM on
power ports
IEC61000-4-5
Magnetic Fields30Am-1 30Am-1 IEC61000-4-8
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Environmental Areas on the Factory
Floor
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Commercial and Industrial
Environmental Classification -
Mechanical
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Commercial and Industrial
Environmental Classification - Ingress
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Commercial and Industrial
Environmental Classification - Climatic
(partial)
Due to enclosure heat rise, components may reach 105 deg C.
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Commercial and Industrial
Environmental Classification -
Electromagnetic
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Commercial and Industrial
Environmental Classification –
Electromagnetic (cont.)
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