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Tested down to the details
EX tests according to IEC 60079-0
Long-term thermal test
During use, the enclosures may be exposed to extremely
high and low temperatures, and to extreme temperature
uctuations. The heat/cold resistance test determines the
temperature range in which the enclosures maintain their full
functionality.
Thermal stability
According to the IEC directive 60079-0 edition 2011 section
26.8, the enclosures must be subjected to hot storage in two
steps:
1. For 336 hours at 90 °C and 95 % humidity
2. For 336 hours at 125 °C (IPX7 test group) or at 155 °C
(IPX6 test group)
Cold stability
Then, in accordance with section 26.9, the enclosures
are stored in the cold for 24 hours at –65 °C. The impact
test is then carried out with 7 joules of impact energy in
accordance with IEC 60079-0.
This test is passed when the enclosures are able to maintain
their IP protection level after the cold and hot storage.
* Exemplary test values for the Klippon
®
TB enclosure series
292454030000