Series RMI-B
close-coupled design
Page
13
9430-005-en
Revision 03
TM 10456
Edition 06/2022
5.6 Monitoring facilities
Appropriate monitoring facilities are to be
recommended, depending on the require-
ments placed on operational safety and
availability of the unit.
Richter provides information on request and can sup-
ply:
♦
Flow meters
♦
Filling level indicators
♦
Motor load monitors
You can obtain the publications "Safe Operation of
Magnetic Drive Pumps" and "The Operation of
Centrifugal Pumps without NPSH Problems" on
request.
5.7 Drive
The power consumption of the pump at the operating
design point is specified in the data sheet and works
certificate. If the operating design point was not known
when the pump was dispatched, the power consump-
tion can be read off the appropriate performance
curves. The max. density, the max. viscosity and a
safety margin are to be allowed for.
Care must be taken when selecting the motor size to
ensure that the excess power is not too great but that
the requirements acc. to DIN EN ISO 5199 are satis-
fied. During start-up the magnetic drive could other-
wise stop.
The magnetic drive rating at the pump speed is given
in the pump data sheet.
If the motor rating exceeds this magnetic drive rating
–
at pump speed -, it is necessary to check for any stop-
page of the magnetic drive.
This also applies if the required drive rating exceeds
80% of the magnetic drive rating
–
at pump 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 (IEC, VDE, etc.).
Only have the electric connection
performed by a qualified electrician.
Compare the available mains voltage with the infor-
mation on the type plate of the motor and select a suit-
able circuit.
A motor protection device (motor-circuit switch) is
urgently recommended.
Danger of explosion if the electrical
installation is incorrect.
In potentially explosive areas IEC 60079-
14 must also be observed for the electri-
cal installation.
If the pump is mounted on a base plate, ensuring elec-
trical conduction through the use of a chopper disk or
contact disk on the housing foot and support bracket.
The assembly must be grounded in accordance with
currently effective regulations, for example, on the
base plate.
