VEM A21 Serie Instructions De Montage, D'utilisation Et D'entretien page 22

Additional Installation, Operating and Maintenance Instructions (Translation)
General
Attention! Read installation, operation and maintenance instructions, connection diagram, addi-
tional connection diagram and safety regulations before transportation, installation, start-up,
maintenance and repair. Mind the information!
The existing additional operation and maintenance manual is valid together with the already mentioned documents
and the operation and maintenance manual for standard motors, where the basic specifications for connection,
installation, operation and maintenance as well as the spare parts lists are included.
For better clarity the installation, operation and maintenance instructions do not include individual information for all
possible special fields of operation and applications with special requirements. Therefore the operator has to make
appropriate safety arrangements.
Roller table motors are a special drive element for the rolling mill industry. The electrical and mechanical require-
ments for roller table motors are extraordinary demanding conditions due to different duty types and load situations
like continuous, intermittend and short-time duty in addition to start, brake and reversing operation. Roller table
motors are designed to operate with all types of overload situations in a standard mill operation as for example
stucking of rolling stock that lead to a blockage of the motor.
1.1 Light roller table motors, type series A21., A20., A22., A42.
The design series A2.R, A42R (IC 411); A21O,A42O (IC410) and A2.F, A42F (IC 416) are derived from the VEM
standard motor series and are of the same mechanical design with regard to their main structural elements. The
windings of these motors have been adapted for driving roller tables. Furthermore, all screwed connections are
additionally secured, and the corrosion protection has also been adapted for use in rolling mills.
1.2 Roller table motors for use with frequency converters, type series ARC
The design series ARC (IC 410) has been developed for use with frequency converters in rolling mills.
It provides a combination of the desirable properties of a converter-fed double squirrel cage rotor, with its accelera-
tion-oriented torque characteristic (M
motor. With the exception of the form of its housing (ring-type ribs) and bearing/sealing arrangement on the drive
end, its construction is identical to that of a VEM standard motor.
1.3 Heavy roller table motors, type series ARB
The heavy roller table motor ARB (IC 410) is intended for mains operation. Like the type series ARC the housing is
provided with ring-type ribs and is composed of grey cast iron with ribs running transverse to the axis direction.
2. Conformity
The motors comply with IEC/EN 60034-1 and other corresponding European standards. The delivery according to
special regulations (i.e. classification societies) is possible.
3. Type of protection
The motors have at least the type of protection IP 55 according to IEC/EN 60034-5. The type of protection corre-
sponding with each design can be taken from the nameplate.
4. Terminal boxes
The terminal boxes have at least the type of protection IP 55 according to IEC/EN 60034-5. They are the same
design as the terminal boxes of standard series K../W..
5. Additional mounted parts or installations
Depending on the motor design and order different additional installations (i.e. anti-condensation heating, tempera-
ture sensors for winding monitoring or others) can be installed or attached.
6. Assembly
For the assembly the following specific information about IP protection type is given in addition to the "General
information" and manuals for possible mounted parts.
The motors have condensate drain holes at the bottom of the end shields. These drain holes are not closed at de-
livery. If the customer wants to comply with the definition of IEC 60034-5 for IP 54, these holes can be closed be-
fore installation of the motors by using the plastic plug included in the auxiliary parts bag. However it was proved by
many years of experience that for standard operational conditions in industrial atmosphere even for outdoor instal-
lations problems during operation due to dust or water ingress is not to be expected.
The use of the plastic plug is advisable if the motor is operated with an installed anti-condensation heating to avoid
condensate water.
/M approx. 3), and the mechanically robust design of a heavy roller table
C A
21
English