Series MNK-B,
size 25-25-100
Page 12
9230-056-en
Revision 14
TM 9542
Edition 06/2016
Care must be taken when selecting the motor size to
ensure that the excess power is not too great. During
start-up the magnetic drive could otherwise stop.
The magnetic drive rating at the nominal speed of
2900 rpm is given in the pump data sheet.
If the motor rating exceeds this magnetic drive rating
–
at nominal speed -, it is necessary to check for any
stoppage of the magnetic drive.
This also applies if the required drive rating exceeds
80% of the magnetic drive rating
– at nominal speed.
Consult Richter if necessary.
Different operating data can be achieved without
changing the pump through the use of different
speeds, e.g. by means of a frequency converter.
The pump with base plate and motor is illustrated in
the
installation drawing
.
The
operating manual of the motor manufacturer
must be observed.
A motor with a valid ATEX certificate is to be
used if employed in zone 1 and 2.
5.8 Electric connection
The operator is obligated to connect the assembly in
accordance with existing regulations 8 (IEC, VDE,
etc.).
Allow only a trained electrician to perform the
electrical connection.
Compare the existing mains voltage with the
indications on the motor’s manufacturer’s nameplate
and choose a suitable circuit.
A motor protection device (motor-circuit switch) is
urgently recommended.
Danger of explosion if the electrical
installation is incorrect.
In areas at risk of explosion, IEC 60079-14 must also
be observed for the electrical installation.
If the pump is mounted on a base plate, ensuring
electrical conduction through the use of a chopper
disk or contact disk on the housing foot and support
leg.
The assembly must be grounded in accordance with
currently effective regulations, for example, on the
base plate.
