Installation; Electrical Connections; Frequency Converter Operation - Biral HP 3 Notice De Montage Et D'utilisation

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6. Installation

When installing the pump, follow the procedure below
in order to avoid damaging the pump.
Step
1
2
4 x ø
L
B
1
1
L
B
2
2
3
4
5
6
Action
Arrows on the pump base
show the direction of flow
of liquid through the pump.
Page 48 shows:
– port-to-port lenghts,
– dimensions of the base,
– pipework connections and
– diameter and position
of foundation bolts.
The pump can be installed
vertically or horizontally.
Ensure that an adequate
supply of cool air reaches
the motor cooling fan.
However, the motor must
never fall below the horizontal
plane.
To minimize possible noise
from the pump, it is advisable
to fit expansion joints either
side of the pump and
anti-vibration mountings
between foundation and
pump.
Isolating valves should be
fitted either side of the pump
to avoid draining the system
if the pump needs to be
cleaned, repaired or replaced.
The pump must always
be protected against backflow
by means of a non-return
valve (foot valve).
Install the pipes so that air
looks are avoided, especially
on the suction side of the
pump.
In the case of installations
in which:
– the discharge pipe slopes
downwards away from
the pump,
– there is a risk of siphon
effect,
– protection against backflow
of unclean liquids
is necessary,
a vacuum valve must be fitted
close to the pump.

7. Electrical connections

Before removing the terminal box cover
and before any removal/dismantling of the
pump, make sure that the electricity
supply has been switched off.
The pump must be connected to an
external mains switch with a minimum
contact gap of 3 mm in all poles.
Connection diagram
Standard motors for HP/HPC
(without winding earth contact)
Mains
The electrical connections should be carried out by
an authorized electrician in accordance with local
regulations (EVU/VDE/NIN).
The pump must be connected to an external switch.
The operating voltage and frequency are marked on the
nameplate. Make sure that the motor is suitable for the
electricity supply on which it will be used.
Three-phase motors must be connected to a motor starter.
The terminal box/motor can be turned 90°C in each case.
1. If necessary, remove the coupling guards.
Do not remove the coupling.
2. Remove the bolts securing the motor to the pump.
3. Turn the motor to the required position.
4. Replace and tighten the bolts.
5. Replace the coupling guards.
6. The lid of the terminal box should be properly mounted
according to its electrical connection and prior to
start-up.
The electrical connection should be carried out as
shown in the diagram inside the terminal box cover.
Do not start the pump until it has been
Warning
filled with liquid.

7.1 Frequency converter operation

All three-phase motors can be connected to a frequency
converter.
Increased motor noise can be produced
Warning
depending on the type of frequency
converter.
The motor can also be exposed to harmful
voltage peaks if an external frequency
converter is used.
Resulting faults, i.e. noise as well as harmful voltage
peaks, can be minimised by fitting an LC-filter between
the frequency converter and motor.
Only screened cables must be used.
The minimum permitted frequency is 25%.
Motors of capacity above 45 kW should be provided
with insulated bearings to prevent bearing damage from
leakage current.
For further information please consult the manufacturer
of the frequency converter.
Circuit
Circuit
33