Page 64 - ITALVIBRAS E-CATALOG

MTF-E
Technical features
Power supply
Three-phase voltage from 220V to 690V,
50Hz or 60Hz; suitable for use with a
PWM inverter from 20Hz to the base fre-
quency with constant torque load profile.
Polarity
2 and 4 poles.
Conformity with European Directives
Low Voltage 2006/95/EC,
ATEX 94/9/EC.
Reference Regulations
IEC/EN 60079-0, IEC/EN 60079-7,
IEC/EN 60079-31, EN 60034-1.
Controls
The components that affect protection
are 100% accurately controlled and
recorded.
Functioning
Continual service (S1) at maximum decla-
red centrifugal force and electric power.
Centrifugal force
Range extended up to 2615 Kgf. (25.7 KN),
with centrifugal force adjustable from 0
to 100%.
Mechanical protection
IP 66 according to IEC 529, EN 60529;
mechanical protection is ensured in the
mounting phase of the vibrator onto the
vibrating machine, by introducing the
special seal into the seat on the coupling used for fixing the vibrator to the vibra-
flange.
64
The MTF-E series has been designed for use in industrial
processes in environments with a potentially explosive
atmosphere, caused by gas and dusts, in compliance with
ATEX Directive (94/9/EC).
In particular, the MTF-E series can be used in areas 1 and
2 (gas) and areas 21 and 22 (dusts) according to the layout
and following features:
Protection against thermal protection The electrical connection must be carried
IK 08 according to IEC 68, EN 50102. out using the relative connectors inser-
ted inside the connection box.
Insulation class Special shaped terminals allow to fix the
Class F (155°C). power supply cable, protecting it from
loosening.
Tropicalization
Standard on all vibrators, with vacuum Electric motor
encapsulation up to size 30, with “drop Three-phase asynchronous type. De-
by drop” trickle system for larger sizes. signed for maximum starting torques
and torque curves adapt for the specific
Ambient temperature requirements of vibrating machines.
From -20°C to +40°C, on request it is pos- Insulated windings using vacuum encap-
sible to have vibrators for max. ambient sulating up to size 30; using the “drop by
temperatures of +55°C. drop” trickle system with class H resin
for sizes 40-50-70. The rotor is die cast
Vibrator thermal protection aluminium.
On demand with PTC rated thermistor heat
detectors 130°C (DIN 44081-44082). Also on Casing
request thermistors with different tempe- In high-tensile aluminium alloy up to size
ratures and anti-condensation heaters. 50, in spheroidal cast iron for size 70.
An external earthing screw is located on
Fixing of the vibrator the casing as prescribed by Regulation
In all positions and therefore without IEC/EN 60079-0
restriction.
Bearing flange
Lubrication Constructed in cast iron (ductile or grey)
All vibrators are lubricated in the factory or in aluminium with steel bearing seat.
and do not require further lubrication if The geometry of the flange transmits the
used in normal operating conditions. In load to the casing uniformly.
heavy duty operating conditions perio-
dical re-lubrication may be applied to N
frame sizes 40-50-70.
Bearings
Electrical connection box The lower and upper bearings have been
The size guarantees passage of tools studied to support the relative load and
therefore they have a particular geome-
ting machine. try, especially designed and made for
Italvibras.
B
H