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Beschikbare talen
Beschikbare talen
When using a HOMA switchgear with LED for direction
of rotation, this flashes in the event of wrong direction
of rotation. The check can be carried out by observation
of the start-jerk. For this, place the pump vertically onto
the floor, slightly onto the edge and switch on for a short
time. When seen from above, the pump rebounds slightly
anticlockwise in correct direction of rotation. The direction
of rotation is correct if the pump moves anticlockwise,
since the motor starts clockwise when seen from above.
The check of the correct direction of rotation in pumps
that are already installed can be carried out by compari-
son of the pumping height and the pumping quantity with
different directions of rotation. The direction of rotation
with the higher pumping height and pumping quantity is
the correct direction of rotation. In the event of wrong
direction of rotation two phases of the power supply must
be interchanged. As standard, the pumps are delivered
with CEE power plugs. The interchange of phases is
carried out by 180° rotation of the round holding plate on
the poles of the plug with a screw driver.
The indicated conveying data and performance data
can only be achieved if a clockwise rotation field is
present. The machinery is not designed for operation
in an anticlockwise rotation field.
5.7. Motor protection
The minimal requirement is thermal relay / circuit break-
er with temperature compensation, differential trigger
and anti-pumping device in accordance with VDE 0660/
respective local regulations. If the machinery is connect-
ed to electric circuits in which frequent interferences
occur, we recommend additional installation of safe-
guarding equipment (e. g. overvoltage relay, undervoltage
relay or phase failure relay, lightning protection, etc.). The
local and legal regulations must be complied with when
connecting the machinery.
Single phase motor
Pumps with 230 V/single phase motors are provided with
one switchgear with circuit breaker, start capacitor and
operation condenser on delivery. These HOMA switch-
gears are also available as accessories. When using
other switchgears the rated current of the motor must be
considered when laying out the circuit breaker.
Three phase motor
Pumps with three phase motors must be connected
to a switchgear with circuit breaker, start capacitor and
operation
condenser
switchgears are available as accessories. When using
other switchgears the current of the motor must be
considered when laying out the circuit break (see name-
plate).
5.8. Switch-on types
Switch-on types with plug/switchgears
Insert the plug into the socket provided for and use the
on/off switch on the switchgear.
5.8.1. After switching on
The rated current is surpassed quickly during the
start-up process. After termination of this process the work
current should not exceed the rated current.
28 | EngliSH
as
standard.
These
HOMA
If the motor does not start immediately after switch-
on, it must be switched off immediately. Before further
switch-on the switch pauses according to the technical
data must be complied with. In the event of a further
interference the machine must be switched off imme-
diately. A further switch-on process may only be started
after recovery of the fault.
The following points should be checked:
•
operating voltage (permitted deviation +/- 5% of the
rated voltage)
•
Frequency (permitted deviation -2% of the rated
frequency)
•
Power input (permitted deviation between the
phases maximum 5%)
•
Voltage difference between the individuals phases
(maximum 1%)
•
Switching frequency and pauses (see technical data)
•
Introduction of air in the feed stream, an impact
plate must be fitted, if appropriate.
•
Minimum submersion in water, level control, protec-
tion against dry run
•
Smooth run
•
Check for leakages, if appropriate take the neces-
sary steps according the chapter 'maintenance'
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