Datasheet

624 PHOENIX CONTACT
DIN EN ISO 1043-4
Halogen-free flame protection
Halogens are the chemical elements
fluorine, chlorine, bromine, and iodine. One
property of halogen compounds is the
reduction in the degree of inflammability
when used in plastics. In fire-protection
tests, a connection has been established
between the release of toxic gases and
halogens.
Terminal blocks from the CLIPLINE
complete system are made of polyamide 6.6
(PA 6.6) with fire protection classification
UL 94 V0. Melamine cyanurates are used
instead of flame protection agents that
contain halogen. Phoenix Contact terminal
blocks are therefore, without exception,
entirely free of halogens.
DIN EN 60112
Comparative tracking index (CTI)
Humidity and contamination facilitate the
formation of creepage distances on the
plastic surface. The formation of creepage
distances refers to the occurrence of
conductive connections between
neighboring potentials depending on their
voltage differences under electrolytic
influences. The CTI value of a plastic
indicates the extent to which this creepage
distance formation is prevented. Two
platinum electrodes are set up on a test
piece (20 x 20 x 3 mm) with a spacing of 4
mm. A test voltage specified by the standard
is applied to both electrodes, which are
subsequently sprinkled with a drop of test
solution every 30 seconds from a device.
The test evaluates the maximum voltage
value at which 50 drops are applied without
a short-circuit current > 0.5 A. The plastics
used by Phoenix Contact are classified in
the highest test voltage category with a CTI
value of 600.
Drop
dispenser
Electrode
Test solution
Test piece
Creepage
traces
Voltage source
IEC 60695-2-11
Glow-wire test
In the event of overload, conductive
metal parts of the terminal block or
connected conductors can heat up
considerably. This additional heat affects the
plastic housing. To simulate this source of
danger for electrotechnical components, a
glow wire is heated to a specific
temperature (550°C, 650°C, 750°C, 850°C
or 960°C) in a glow-wire test and is then
pushed onto the thinnest part of the
housing of the test object at a right angle
with a force of 1 N, as shown in the figure.
The test is deemed to be passed:
– When no flame or glowing process occurs
during the test
– When the flames or glowing processes are
extinguished within 30 seconds of the
glow wire being removed
– When the tracing paper beneath the glow
wire does not ignite due to drops of
burning substances falling down
The polyamides used by Phoenix Contact
as housing materials all meet the
requirements of the glow-wire test at
960°C (highest level).
Technical information
Quality tests