Page 599 - Wago_Rail-MountedTerminalBlockSystems_Volume1_2015_US.pdf

Tests and Testing Procedures per IEC/EN Standards (continued) 14
597
Material Tests

All WAGO products meet requirements for the following material tests:

• Needle Flame Test to IEC/EN 60947-1
This test simulates flames that may arise under certain conditions (e.g, fault current over a creepage distance, overloading parts
or components). Nearby parts can also be affected by such flames. Not only is the ignition of the test specimen resulting from an
intrinsic defect tested, but also its behavior when other parts are ignited.

Flames shall not be further fed by the insulation materials used,
Terminal block creating a larger fire. The test specimen is exposed to a stan-
dard gas flame during a defined time period (e.g.,10 seconds).
After the test flame has been removed, the specimen must self-
Mount extinguish within 30 seconds. Furthermore, a layer of tissue
Terminal block
paper located beneath the specimen shall not be ignited by
glowing particles falling from the specimen.

Mount
Lateral insulation wall Tissue paper Clamping part in
the area
of the clamping unit
Pinewood board Point of test
Test arrangement flame contact

• Glow-Wire Test to IEC/EN 60998-1, IEC/EN 60695-2-11
In the event of failure, a high current may cause a conductor to glow.

However, the glowing conductor shall not The test is to be passed if there are no
cause ignition of the product involved visible flames or permanent glowing, or if
(e.g., a rail-mounted terminal block). For flames or glowing extinguish within 30
the glow-wire test, the tip of the glow-wire seconds after removal of the glow-wire.
is pressed against a surface of the test Furthermore, a layer of tissue paper loca-
specimen (see picture). ted beneath the specimen shall not be
The position of the test specimen, surface ignited by glowing particles falling from
to be tested, test duration, and glow-wire the specimen.
temperature (e.g., 960°C over 30
seconds, or 850°C over 5 seconds) are
specified in the standards.

14