Explosion-protected electrical equipment
can have various types protection in
accordance with the 60079 standard
requirements.
Ex Components
Ex components are elements electrical
equipment for hazardous areas that are
marked with the “U” letter.
.
THE FOLLOWING APPLIES
AS GUIDELINE FOR THE
UNDERLYING PRINCIPLE
FOR EXPLOSION PROTECTION:
General Requirements
The European 60079-0 Standard VDE
0170-1 Classification contains general
requirements for the design and testing of
electrical equipment used hazardous
areas.
The ignition protection category “n” exclu-
sively describes the use explosion-pro-
tected electrical components Zone This
zone includes areas which hazardous,
potentially explosive atmospheres are likely
to occur rarely short-term.33
www. Such atmosphere can
be produced any location where flamma-
ble gases liquids are manufactured, pro-
cessed, transported and/or stored.
Ignition protection category “n” also requires
that electrical equipment provided with
additional markings follows:
• non-sparking
• enclosed-break, hermetically sealed,
non-incendive, sealed
• restricted-breathing
The table the opposite page shows an
overview the standardized ignition protec-
tion categories and describes their basic
principle, well typical applications.
Regulations covering these electrical compo-
nents are being prepared worldwide.
EN 60079-0 supplemented revised by
the European standards indicated the
right which refer the specifically standard-
ized types protection.
This ensures this equipment does not cause
an explosion the surrounding atmosphere.
Protection used the manufacturer essen-
tially depends the type and function the
apparatus.
Ignition Protection Categories
Only explosion-proof (protected) equipment
must used areas which explosive
atmosphere may still expected despite
the implementation prevention measures. This represents
a transition between Zone which explo-
sion protection required, and the safe area
in which, for example, welding may per-
formed any time. These compo-
nents must not used their own such
areas and require additional certificate
when used such areas when installed the
electrical equipment.wago. From safety point view, all
standardized types protection should be
viewed equal.com
WAGO Rail-Mount Terminal Block Systems
Technical Information for Applications
General Technical Information Electrical Equipment
Used Hazardous Areas
The formation explosive atmosphere is
required for the existence potentially
explosive hazard.
Such hazardous areas can found wide
range industries, including chemical plants,
refineries, power plants, paint production
facilities, painting shops, filling stations, vehi-
cles, sewage treatment plants, airports, grain
mills harbor facilities. Organi-
zations such KEMA the Netherlands, or
PTB Germany certify that the devices meet
the requirements the 60079-15 stan-
dard. This
includes items for generation, transport, dis-
tribution, storage, measurement, control,
conversion and consumption electrical
power, well telecommunications.
Electrical Equipment
Electrical equipment includes all items used
in whole part with electricity
