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Electrical connection
54
WILO SE 2022-06
NOTICE
The connection diagram for electrical connections is in the terminal box cover.
Setting the motor protection switch:
PTC
W2
U2
V2
W1
U1
V1
L3
L1
L2
Fig. 5:
Y-Δ start
ƒ
Set according to the rated motor current specified on the rating plate of the motor.
Y-Δ starting: If the motor protection switch is switched in the supply line to a Y-Δ
contactor combination, adjust the switch as for direct starting.
If the motor protection switch is switched in a thread of the motor supply line (U1/
V1/W1 or U2/V2/W2), set the motor protection switch to the value 0.58 x rated
motor current.
ƒ
Connect the PTC thermistor sensors to the PTC thermistor tripping unit.
CAUTION
Risk of property damage!
Only a maximum voltage of 7.5 V DC may be applied to the PTC thermistor sensor
terminals. A higher voltage will destroy the PTC thermistor sensor.
PTC
W2
U2
V2
W1
U1
V1
Fig. 6:
Δ connection
ƒ
The mains connection is dependent on the motor power P2, mains voltage and ac-
tivation type. Refer to the following table and Fig. 5 and Fig. 6 for the required
connection of the connecting bridges in the terminal box.
Activation type
Mains voltage 3∼ 400 V
Y-Δ-start (standard)
Remove connecting bridges (Fig. 5).
Start via soft starter
Δ-connection (Fig. 6)
Table 4:
Terminal assignment
ƒ
When connecting automatic switchgears, observe the corresponding installation
and operating instructions.
ƒ
For three-phase current motors with Y-Δ connection, be sure that the switch-over
points between star and triangle are very close together in time.
Longer switch-
over times can lead to pump damage.
Recommended setting the times for Y-Δ activation:
Motor power
Time to be set
> 30 kW
< 5 seconds
CAUTION
Even brief dry running will destroy the mechanical seal!
Only carry out the direction of rotation monitoring after the system is filled!
NOTICE
Use of soft starters is recommended to limit the starting current and preventing
tripping of excess current protection devices.
8.1
Anti-condensation heater
We recommend an anti-condensation heater for motors which, due to climatic condi-
tions, are at risk of condensation. These are, for example, idle motors in humid environ-
ments or motors that are exposed to large temperature fluctuations. Motors equipped
with an anti-condensation heater at the factory can be ordered as special versions. The
anti-condensation heater is used to protect the motor windings against condensation
water inside the motor.
ƒ
The anti-condensation heater is connected to the terminals HE/HE in the terminal
box (connection voltage: 1~230 V/50 Hz).
Содержание Atmos GIGA-B
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Страница 5: ...Mounting the mechanical seal Fig XII Fig XIII 1 Fig XIV Fig XV 1 2 3 Fig XVI Fig XVII...
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Страница 7: ...Exchange of Motor Fig XXIV Fig XXV 1 8x Fig XXVI Fig XXVII Fig XXVIII...
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