1 lEC 60947-1.
Pollution severity
IEC 60947-7-1
The pollution severity specifies the
influence solid, liquid gaseous
foreign matter that could reduce the
electric strength the specific surface
resistance. designed
to guarantee the free movement of
goods within Europe. They are
determined according IEC 60664-1.5 41
mm2
10 35
A 101 125
mm2
50 120
A 150 192 232 269
mm2
150 185 240 300
A 309 353 415 520
Conventional free-air thermal
current (Ith)
The conventional thermal current in
free air (Ith) the largest test current
for warming tests open equipment in
the free air, see 4.
Operating conditions
The modular terminals can used in
the following standard conditions:
• Ambient temperature °C.
CE marking
The manufacturer responsible for CE
labelling accordance with the
corresponding Directive.. Together with the
appropriate technical documentation
declarations conformity are kept
available for review the responsible
monitoring authority. This printed the
packaging. non-permissible
rise the temperature the terminal
occurs conjunction with these rated
currents:
mm2
1.0 6.
Rated impulse withstand voltage
IEC 60947-7-1
This the value surge voltage to
which the modular terminals can be
subjected and which the clearances
to IEC 60947-1 IEC 60664-1 are
based.
Rated voltage
IEC 60947-7-1
The rated voltage modular terminal
is the rated insulation voltage which
the insulation tests and creepage
distances are based.+40 °C,
average value over +35 °C
• Attitudes 2000 above sea
level
• Relative humidity +40 °C,
90 +20 °C
W
Technicalappendix
W.Norms, Standards, Terms
Rated current
IEC 60947-7-1
Test currents are assigned the rated
cross-sections accordance with
IEC 60947-7-1.0
A 17.
(EMC)
Interference immunity
Terminals used applications
that fall under the scope of
the IEC/EN 60947-7-1 are immune to
electromagnetic disturbances.3..2.
If the test current not required be
reduced for the associated rated
cross-section, then the term remains
“rated current”.5 4.
Emitted interference
Terminals used applications
that fall under the scope the
IEC/EN 60947-7-1 not generate
electromagnetic disturbances.
The minimum clearance defined in
IEC 60947-7-1 conjunction with the
rated impulse withstand voltage. Cable connectors
from V∼/75 fulfil the
fundamental safety requirements
stipulated the Low Voltage Directive
2006/95/EC. This
confirms conformance with the
Directive for the attention of
government authorities.
Pollution severity has been specified
for modular terminals for industrial
applications: the occurrence of
conductive contamination dry,
non-conductive contamination
which becomes conductive because
condensation expected. For that
reason emitted interference tests are
required.131282250000 2012/2013
.5 2. The
reduced current values are then
designated conventional thermal
current free air (Ith). For that
reason immunity tests are required.
This applies exclusively terminal
blocks with multiple connection levels
(multi-tier terminals) and test-
disconnect terminals for which a
current reduction permissible
