Kärcher HKF 50 VA/E, Operating Instructions Manual

Page: 30 / 133

English HKF 50 VA/E VA/P
5.956-485 A 2005937 (10/03)
9. Area classification
In the BetrSichV and EN 1127-1, hazardous
(potentially explosive) areas are classified into
zones according to the frequency and duration
of the occurrence of hazardous, potentially
explosive atmospheres.
It is the responsibility of the owner/operator
to define the zones.
Notes on area classification are given in the
BetrSichV, EN 1127-1,
BGR 104 – Ex-Guidelines of BG Chemie and in
DIN EN 60 079-10.
Zone 0
is an area in which hazardous, potentially
explosive atmospheres exists constantly, for
long periods of time or frequently as a mixture of
air and combustible gases, vapours or mists.
Zone 1
is an area in which hazardous, potentially
explosive atmospheres consisting of a mixture
of air and combustible gases, vapours or mists
can occasionally form during standard
operation.
Zone 2
is an area in which hazardous, potentially
explosive atmospheres consisting of a mixture
of air and combustible gases, vapours or mists
do not normally occur during standard operation
or only for a short time.
Zone 20
is an area in which hazardous, potentially
explosive atmospheres in the form of a cloud of
combustible dust contained in the air exist
constantly, frequently or for long periods of time.
Zone 21
is an area in which hazardous, potentially
explosive atmospheres in the form of a cloud of
combustible dust contained in the air can
occasionally form during standard operation.
Zone 22
is an area in which hazardous, potentially
explosive atmospheres in the form of a cloud of
combustible dust contained in the air do not
form during standard operation or only for a
short time.
A. For your safety
A5