Datasheet

100806040200
4
6
12
14
8
10
16
2
0
1
2
45K
614 PHOENIX CONTACT
The rise in temperature of a terminal
block must be kept to an absolute minimum.
The contact resistance must therefore be
as low as possible. This test is used to
document the rise in temperature that
occurs at room temperature during
exposure to a test current.
IEC 60947-7-1/-2
Five terminal blocks are horizontally
mounted on a rail and connected in series
using conductor loops with the rated cross
section, each measuring 1 or 2 m in length.
The terminal blocks are exposed to a test
current that is as high as the current
carrying capacity of the rated cross section.
The rise in temperature on the middle
terminal block is documented (see figure:
voltage-drop test, page 612).
Assuming a room temperature of ~20°C,
a maximum rise in temperature of 45 K is
permitted in the terminal block.
Additionally, a voltage-drop test must be
performed on the terminal block as a final
step.
UL 1059
The process basically corresponds to the
IEC test, only the conductor lengths differ.
Three terminal blocks are horizontally
IEC 60947-7-1/-2/UL 1059
Temperature-rise test
mounted adjacent to one another. The
measurement is taken at an ambient
temperature of 25°C, whereby a maximum
rise in temperature of 30 K (measured as
close as possible to the terminal point) is
permitted. Due to the high-quality contact
materials used in terminal blocks from
Phoenix Contact, all connection
technologies offer lower heating values than
required by the specified standards.
Standard IEC 60947-7-1/
EN 60947-7-1/DIN VDE 0611-1 specifies
the test currents for the individual
conductor cross sections listed in the
adjacent table. The corresponding currents
are listed with the connection data for the
individual terminal blocks. The type tests of
terminal blocks are based on this data.
Test currents according to IEC 60947-7-1/EN 60947-7-1, Table 5
Rated
cross section
[mm
2
] 0.2 0.5 0.75 1.0 1.5 2.5 4 6 10 16
Test current [A] 4 6 9 13.5 17.5 24 32 41 57 76
Rated
cross section
[mm
2
] 25 35 50 70 95 120 150 185 240 300
Test current [A] 101 125 150 192 232 269 309 353 415 520
Current carrying capacity
10 A, 17.5 A, 24 A, and 32 A) and setting
the temperature balance, the maximum
temperature increase that occurs on the
test objects is measured.
When the upper limiting temperature of
the insulation material – here, always
assumed to be 100°C – is taken into
account, these values yield a current-
carrying capacity curve dependent on the
ambient temperature: the “base curve”.
An adjusted capacity curve – the
“derating curve” – is generated according to
DIN EN 60512-5-2. According to this
standard, the permissible load current is 0.8
times the respective base current. The
derating factor “...takes into account
manufacturing tolerances in the contact
system of connectors as well as
uncertainties in the temperature
measurement and the measuring
arrangement”. For the majority of items in
this catalog, derating curves are given for 2,
5, 10, and 15-pos. arrangements.
To determine the current carrying
capacity of plug-in terminal blocks,
arrangements with a variety of positions are
selected, which are electrically connected in
series using conductors with the same cross
section. For the practical determination of
the derating curves, the current carrying
capacity of the plug-in terminal blocks is
determined according to DIN EN 60512-5-
1. Here, after applying various currents (e.g.,
Load current [A]
Ambient temperature [°C]
 = Base curve
 = Derating curve
Base and derating curve, test setup, ambient temperature
Technical information
Quality tests