Northern Connectors Harting HAN Industrial Rectangular Connectors - Manual (Page 30)

Han
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Electrical engineering data
Other terms explained
Clearance air gap
The shortest distance through the air between two conductive ele-
ments (see DIN EN 60 664-1 (VDE 0110-1), Para. 3.2). The air
gaps are determined by the surge voltage withstand level.
Creepage distance
Shortest distance on the surface of an solid insulating material
between two conductive elements (see DIN EN 60 664-1 (VDE
0110-1), Para. 3.3). The creepage distances are dependent on the
rated voltage, the pollution degree and the characteristics of the
insulating material.
Working voltage
Fixed voltage value on which operating and performance data
are based. More than one value for rated voltage or rated voltage
range may be specified for the same connector.
Rated impulse voltage
The rated impulse voltage is determined on the basis of the over-
voltage category and the nominal power supply voltage. This level
in turn directly determines the test voltage for testing the overvolt-
age resistance of the connector (Waveform voltage in 1.2/50 µs
as per IEC 60 060-1).
Working current
Fixed current, preferably at an ambient temperature of 40 °C,
which the connector can carry on a permanent basis (without
interruption), passing simultaneously through all contacts which
are in turn connected to the largest possible conductors, with-
out exceeding the upper temperature limit.
The dependence of the rated current on ambient temperature is
illustrated in the respective derating diagrams.
Transient overvoltages
Short-term overvoltage lasting a few milliseconds or less, oscil-
latory or non-oscillatory, generally heavily damped (see DIN EN
60 664-1 (VDE 0110-1, Para. 3.7.2). An overvoltage may occur as
a result of switching activities, a defect or lightening surge, or may
be intentionally created as a necessary function of the equipment
or component.
Power-frequency withstand voltage
A power-frequency overvoltage (50/60 Hz).
Applied for a duration of one minute when testing dielectric strength.
For test voltages in association with surge voltage withstand lev-
els, see extract from Table 8, DIN EN 61 984.
Test voltages (Extract from Table 8, DIN EN 61 984)
Impulse withstand voltage RMS withstand voltage
kV (1.2/50 µs) kV (50/60 Hz)
at an altitude of 2 000 m
0.5 0.37
0.8 0.50
1.5 0.84
2.5 1.39
4 .0 2.21
6 .0 3.31
8 .0 4.26
12 .0 6.6 0
CTI (Comparative Tracking Index)
This figure gives an indication of the conductivity of insulating
materials and affects the specified creepage distances. The in-
fluence of the CTI value on the creepage distance is as follows:
the higher the index value, the shorter the creepage distance. The
CTI is used to divide plastics into insulation groups.
Breakdown of insulation groups:
I 600 ≤ CTI
II 400
≤
CTI < 600
IIIa 175
≤
CTI < 400
IIIb 100
≤
CTI < 175
Protection levels as per IEC 60 529
The protection level describes the leak-proof character of hous-
ing, e. g. for electrical equipment. It ranges from IP 00 to IP 68.
HARTING heavy duty Han connectors feature a standard protec-
tion level of IP 65 (see page 00.09, Table based on DIN EN 60 529,
IEC 60 529).
Derating diagram as per DIN EN 60 512-5-2
These diagrams are used to illustrate the maximum current carry-
ing capacity of components. The illustration follows a curve which
shows the current in relation to ambient temperature. Current car-
rying capacity is limited by the thermal characteristics of contacts
and insulating elements which have an upper temperature limit
which should not be exceeded.
clearance
creepage
distance