Grundfos BMS Series - BMS Hp Pump; BMS Hs and BMS Xl Pumps; BMSX System; 6 Electrical Connection

Both the inlet and outlet pipes must be supported close to the end
of the pipes.
TM059348
Horizontal and vertical support of pipes
WARNING
Pressurised system
Death or serious personal injury
‐ Avoid stress in the pipe system.
When fitting the Victaulic couplings, allow a gap of 3.5 mm between
the two pipes. See the section on pipe connection.
The PX unit must not be supported by its pipe fittings nor
must the PX unit be allowed to support pipes or manifolds.
Related information
5.3.5 Pipe connection
6. Electrical connection
DANGER
Electric shock
Death or serious personal injury
‐ Connect the pump to an external main switch placed
close to the pump and to a motor-protective circuit
breaker or a frequency converter.
‐ It must be possible to lock the main switch in OFF
position (isolated). Type and requirements as specified
in EN 60204-1, 5.3.2.
‐ The pump must be earthed.
DANGER
Electric shock
Death or serious personal injury
‐ Before starting any work on the product, make sure
that the power supply has been switched off and that it
cannot be accidentally switched on.
The electrical connection must be carried out by an authorised
electrician in accordance with local regulations and the wiring
diagrams for the motor protection, starter and monitoring devices
used. Make the electrical connections in the terminal box.
Wiring must be done according to the wiring diagram supplied with
the Grundfos product.
6.1
Output filters
Output filters are used primarily to protect the motor against
overvoltage and increased operating temperature. However, you
can also use output filters to reduce acoustic noise from the motor.
Grundfos offers two types of output filter as accessories for CUE:
• dU/dt filters
• sine-wave filters.
6.1.1
Use of output filters
The motors used for BMS pumps are designed for a maximum
supply voltage to the frequency converter of 480 V. If the supplied
voltage is higher, we recommend installing an output filter between
the frequency converter and the motor.
The motors used for BM pumps are designed for a maximum
supply voltage to the frequency converter of 480 V. If the supplied
voltage is higher, we recommend installing an output filter between
the frequency converter and the motor.
The selection depends on these factors:
• pump type
• motor cable length
• the required reduction of acoustic noise from the motor.
6.1.2 Cables used in CUE installations
We recommend using screened cables and output filters in EMC-
sensitive sites when CUE is installed in connection with BMS
pumps.
A B
B
D E C
TM086024
Example of an installation in EMC-sensitive sites
Pos. Description
A Mains cable, unscreened
B Screened cable
C BMS pump
D CUE
E Filter
Screened cables and output filters are required in those parts of the
installation where the surroundings must be protected against EMC.
6.2 BMS hs and BMS xl pumps
Mains and signal cables
See the quick guide or installation and operating instructions for the
drive or the motor.
In case of a BMS hs or BMS xl pump, you are now ready for
commissioning.
Related information
7.2.1 Before startup
6.3 BMS hp pump
See the quick guide or installation and operating instructions
supplied with the product.
See the nameplate to identify the motor type and type of control
board.
Default settings for the BMS hp motor:
• minimum speed: 1700 rpm
• maximum speed: 3600 rpm
• setpoint input: 4-20 mA
• relay: alarm.
If not controlled by a 4-20 mA signal, the external setpoint
input must be disabled by the remote control.
6.4 BMSX system
For electrical installation, see the sections on the BMS hs, BMS xl
and BMS hp pumps.
Related information
6.2 BMS hs and BMS xl pumps
6.3 BMS hp pump
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