J. D. NEUHAUS PROFI 25TI, Оригинальное руководство по эксплуатации и сборке

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Page 11
PRODUCT INFORMATION
GENERAL NOTE ON DESIGNATION
The highest possible respective designations for lifting equipment
and running gear are usually replaced by a designation which
corresponds to the normal assembly of a compact complete device
(trolley or crane system).
ADDITIONAL DESIGNATION “X”
This designation refers to explosion protection details in the
operation instructions.
II 2 GD IIA T4(X)/II 3 GD IIB T4(X) or
II 3 GD IIA T4(X):
This designation does not permit use in the presence of the
extremely flammable substances hydrogen sulphide and ethylene
oxide or in the presence of light metal or other impact-sensitive
dusts, or in the presence of dusts with glow temperatures below
210°C or ignition temperatures below 202°C. The permissible
ambient temperature range (Ta) extends from - 20°C to + 70°C.
II 2 GD IIC T4(X) or II 2 GD IIB T4(X): The permissible
ambient temperature range (Ta) extends from - 20°C to + 70°C.
... II C T6(X):
This designation permits use in the presence of carbon disulphide
or other temperature class T6 substances only under special
conditions, which have been agreed with the manufacturer and
which are described in the crane documentation and which stipulate
the maximum surface temperatures for the device.
USE IN MINING APPLICATIONS
Standard versions of JDN hoists, trolleys and crane systems may
generally also be used for underground mining operations as well
as for the associated surface facilities, which are hazardous due to
firedamp and/or combustible dusts. Within this equipment group I
they belong to category M2.
They constitute devices which can be switched off in cases where
an explosive atmosphere forms. They are equipped with protective
measures offering a high degree of safety. The protective measures
with which products of this category are equipped provide the
necessary degree of safety for normal operation as well as
operation under difficult conditions, in particular rough treatment
and changing environmental influences.
For hazardous conditions above and beyond explosion protection,
prevailing with regard to the general use of the devices in mining
applications, special mining hoists are available from
J. D. NEUHAUS. The maximum permissible temperature of 150°C
in accordance with EN 13463-1
5
for coal dust atmospheres is not
reached. For mining applications, the relevant designation for hoists,
trolleys and crane systems is I M2.
LOAD CHAIN
In order to guarantee the required degree of earthing, rusty chains
must no longer be used in zones 1 and 21. This is due to the fact
that, depending upon the degree of corrosion, the leakage
capability of the chain may be impaired to a level that is no longer
adequate.
COMPRESSED-AIR HOSES
In zone 1, compressed air hoses must have a sufficiently low
surface resistance of less than
10
9
Ω
in order to prevent
electrostatic ignition hazards. Otherwise (resistance >
10
9 Ω
)
,
for explosion groups I, IIA and IIB the hoses must be
∅
≤ 30
mm and for explosion group IIC,
∅
≤
20 mm or proof must be
provided that they cannot become dangerously charged.
MATERIALS FOR FRICTION AND IMPACT HAZARDS
Friction and impacts can give rise to individual sparks presenting
a danger of ignition in the presence of explosion group IIC gases,
hydrogen sulphide, ethylene oxide, or light-metal and other
impact-sensitive dusts. Therefore, spark formation caused by
mechanical influences must be prevented.
The chain and load must always be moved in such a way that
sliding and/or frictional contact with other plants or components is
excluded. If circumstances do not permit this, it is necessary to
ensure an absence of explosive atmospheres during operation.
Impacts between particular materials result in an increased
ignition hazard. This does not apply to corrosion-resistant steel or
cast iron against aluminium, magnesium or corresponding alloys.