Datasheet

For further information and full technical data, visit phoenixcontact.net/products
603PHOENIX CONTACT
IEC 60079
Worldwide explosion protection
Explosion protection around the world is
mainly based on the IEC 60079 series of
international standards and European and
American standards and directives.
In North America, the basis for this is the
National Electric Code (NEC) in the USA
and the Canadian Electrical Code (CEC) in
Canada. Directive 94/9/EC (ATEX 100a) is
of particular importance to manufacturers
of devices and protective systems within
CENELEC countries of the European
Community and beyond. We accommodate
international requirements with IECEx
certificates. This means that use in
protection type Ex e “increased safety” is
permitted in zone 1 and 2. However, this is
only under the condition that the terminal
blocks are enclosed in type-tested housings
which meet the requirements for
protection type “e” increased safety.
Requirements for terminal blocks
The protection types “d” flameproof
enclosure, “p” pressurized enclosure, and
“m”, “q”, “o” (e\\\ncapsulation, sand filling or
oil immersion) do not present any special
requirements for terminal blocks. The
protection principle of increased safety “e”
(IEC/EN 60079-7) is generally based on
increased constructional measures. The
most important ones for terminal blocks
are:
– Clearances and creepage distances
– Terminal blocks must be secured against
loosening, fastened and designed so that
the cables cannot come loose or be
impermissibly damaged by the terminal point.
– The clamping pressure must not be
transmitted via insulating parts.
– Terminal blocks that are intended for
the connection of stranded conductors
must be fitted with an intermediate
elastic element.
These requirements and the technical
data are checked by an independent testing
institute (notified body, e.g., DEKRA, PTB,
TÜV, etc.) and certified by the appropriate
certificate. The following tests must be
verified by the type examination:
– Type test according to IEC 60947-7-1/-2
– Proof of clearances and creepage
distances and dielectric test
– Aging test:
– 14 days' storage at 95°C and 95%
humidity
– A further 14 days with dry heat at the level
of the TI value of the insulation material
– 24 hours' low-temperature storage at
-65°C with subsequent conductor pull-
out test
The Ex e-approved terminal blocks from
Phoenix Contact are standard terminal
blocks. These are 100% routine-tested
during the manufacturing process according
to IEC/EN 60079, which includes a
dielectric test.
Detailed information and data sheets with
instructions for installing terminal blocks in
the Ex area are available in the product area
on our website at
phoenixcontact.net/products.
The certificates certify that the test was
carried out by the respective notified body
Ex e-certified products
according to IEC/EN Ex are
subject to compulsory
marking
Note
Technical information
Worldwide explosion protection