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“i” IEC 60079-11
EN 60079-11
Equipment protection intrinsic safety:
Power circuit which sparks thermal effects can occur and cause
the ignition certain explosive atmosphere.com
WAGO Rail-Mount Terminal Block Systems
Technical Information for Applications
Ignition Protection Categories
Symbol Standard Explanation Application Area
“o” IEC 60079-6
EN 60079-6
Equipment protection oil immersion:
Electrical equipment parts such equipment are immersed oil. This corre-
sponds approximately the known special protection type.
Zones 2
“eb”
“ec”
IEC 60079-7
EN 60079-7
Equipment protection increased safety:
Additional measures applied achieve increased security against the
possibility excessive temperatures and the occurrence arcs or
sparks.
Zones 2
“q” IEC 60079-5
EN 60079-5
Equipment protection sand filling:
Filling the electrical equipment housing with fine grain sand prevents the
ignition surrounding explosive atmosphere electric arc gener-
ated the housing.
Zone 2:
“m” IEC 60079-18
EN 60079-18
Equipment protection cast encapsulation:
Dangerous electrical equipment embedded cast mass.
Zones 2
“p” IEC 60079-2
EN 60079-2
Equipment protection pressurized enclosure:
The ingress the external (explosive) atmosphere into the electrical
equipment housing prevented maintaining protective gas internally
at pressure above that the external atmosphere.
Zones 2
IEC 60079-25
EN 60079-25
Intrinsically safe electrical systems “i”:
Assembly interconnected electrical equipment which the circuits
intended for use, whole part, hazardous environments are
intrinsically safe. documented accordingly the system description
Zones 2
following
special testing
Zone 0
Continued
General Technical Information Electrical Equipment
Used Hazardous Areas
.
Zones 2
following
special testing
Zone 0
“nA”
“nC”
“nR”
IEC 60079-15
EN 60079-15
Equipment protection type protection “n”:
Electrical equipment group for use areas which explosive mix-
ture gas, vapor mist unlikely occur during normal operation and,
if does, will for short period.
Zones 2
“d” IEC 60079-1
EN 60079-1
Equipment protection flameproof enclosures:
The parts that could ignite explosive atmosphere are encapsulated a
housing, which will withstand the explosion pressure within the housing.wago
