-19 -
VARVEL
IUM
DIRECTIVE 94/9/CE - (ATEX)
9.4 Temperature
The units must be properly ventilated: ckeck that ventilation
temperature does not exceed 55 °C.
Measure housing temperature after 2 hours from start up
and check that the difference between measured
temperature (see the following sketch) and ambient
temperature does not exceed the max. value of 80 °C .
In such a case, immediately stop the unit and call for
Customer Service.
9.5 Safety Instructions
The electric motors and all the other elements, also enclosed the combinations of other power transmission elements to fit
at the input or at the output of the products VARVEL-ATEX, must be ATEX approved according the Directive 94/9/CE.
Temperature classes and max. temperature must be compatible with expected temperature limits of different product
types.
VARVEL gearboxes and variators must be installed and serviced according to installation and servicing standards for
classified environments against explosion hazard because of gas or dust presence (e.g. EN 60079-14, EN 60079-17, EN
50281-1-2 and any other acknowledged national standard).
In case of combustible dusts, it is mandatory the regular cleaning to avoid any accumulation of dust layers on product
surfaces
.
The variators series VR (to run in category 2GD, or 3GD with overload possibilities) must be put into operation only when
fitted with a control device of output shaft rotation, made of impulse generator and speed control device (antiskid device),
that should be properly installed and calibrated by trained and qualified personnel.
Carefully check the speed control operation before starting the variator up.
Unique identification of the variators Series VR VARVEL-ATEX
is threaded hole (A) on the housing to install a pulse generator
(see drawing).
Speed control device and pulse generator are not included in
the standard configuaration of Variators VARVEL-ATEX.
Nevertheless, ask when ordering for the built in pulse
generator and output shaft speed control with the following
specifications.
Pulse Generator
Speed Control Device
- Make:
Fuchs,GmbH
Fuchs, GmbH
- Type:
NCB2-12GM35-N0
KFD2-DWB-Ex1.D
according to DIN 60947-5-6 (NAMUR)
according to DIN 60947-5-6 (NAMUR)
with cable 2 m long
…………
- Housing threaded hole:
M12x1
…………
- ATEX Certification:
PTB 00 ATEX 2048 X (II 1 G Eex ia IIC T6)
TUV 99 ATEX 1408 (II 1 G Eex ia IIC)
ZELM 03 ATEX 0128 X (II 1 D Ex iaD 20 T..)
MRC
MRD
MRS
MRT
MVR
MXA
MRP
A
ACNH B.V.
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