Homa TGR series, Оригинальное руководство пользователя

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3.3.2. Motor
The three-phase asynchronous motor consists of an
engine block and the engine shaft with the impeller as-
sembly. The circuit for power supply is designed for the
maximal mechanical performance according to the charac-
teristics or the nameplate of the pump. The cable inlets as
well as the circuit are sealed resistant to jet water towards
the pumped medium. The shaft bearing is carried out by
means of robust, maintenance-free and permanently
lubricated antifriction bearings.
General motor nameplate data
Service factor 1:15 AM
Operating mode with immersed motor S1
Operating mode for surfaced motor for:
• TGR…W(A)
• TGR…D(A)
S2 20min / S3 40%
S2 30min / S3 50%
Permitted medium temperature 40°C
Insulation class F (155°C)
Protection class IP68
Standard cable length 10 m
Shaft seal
Axial face seal Lip seal (motor side),
silicone carbide / silicon
carbide (medium side)
Storage one ball bearing (top)
one ball bearing (bottom)
3.3.3. Monitoring devices
The unit is equipped with various monitoring safety equip-
ment. The following table shows an overview of the
available options. Depending on the size of the discharge
nozzle, options may vary.
Motor type Motor version
…W... 230V / 1Ph
...D… 400V / 3Ph
…A… Automatic float
Temperature sensor
In the standard version, the temperature sensors are
connected internally in the motor so that no special con-
nection is necessary.. After cooling, the motor will restart
automatically. The triggering temperature is 130°C.
Checking direction of rotation
No check is required for single-handed motors, since
these always run in the correct direction.
Three-phase
motors have the correct direction of rotating
if connected to a clockwise rotating field (U, V, W -> L1,
L2, L3). HOMA switchgears check the circuit for clock-
wise rotating field. If there is no clockwise rotating field,
the red LED flashes. Two phases have to be interchanged
at the input of the switchgear. For smaller pumps 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 an-
ticlockwise, since the motor starts clockwise when seen
from above.
ST
AR
T
REACTION
ROTOR
REACTION
ATTENTION
The direction of rotation
is correct if the
impeller/propeller rotates
in a clockwise manner
when viewing down from
top of the placed unit
ATTENTION
The start reaction is
anti clockwise
Warning - rotating impeller!
Do not touch the rotating impeller or do not reach the
pump chamber through the pressure socket!
Never put your hands into the pump chamber or
touch the rotating parts in operating mode. Switch
the machine off and let the rotating parts come to
gridlock before carrying out maintenance work or
repair work!
Furthermore it is possible to check the direction of ro-
tation with a ‘motor and phase rotation indicator’. This
measuring device is held towards the engine block of the
running pump from externally and shows the direction of
rotation by means of LED.
Automatic float switch
The float switch is directly connected to the pump cover.
An additional float cable is not necessary. By directly con-
necting the float switch in the pump, the pump turns on
automatically if this switch is triggered manually! There-
fore, make sure that the pump is not connected if you are
working on the float.
3.3.4. Seal / Seal housing
The seal is created by one lip seal and one mechanical
seal (silicon carbide) in tandem arrangement.
3.3.5. Pump housing
The pump housing is supplied with a discharge G 2” A.
3.3.6. Impeller
The impeller are fixed on the engine shaft, which powers
it. The impellers are open multi-blade impeller.
3.3.7. Cutter system
The cutter system includes a fixed cutting ring and a cut-
ter head which is mounted on the motor shaft. Thereby
the cutter head turns with motor rotation speed and cut
all solids in the sewage. Both parts consist of hardened
stainless steel.