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Three-phase motor 380 - 400 - 415 V:
Three-phase motor 440 - 460 V:
Power
[KW]
[HP]
2,2
3
3
4
4
5,5
5,5
7,5
7,5
10
11
15
15
20
18,5
25
22
30
30
40
37
50
45
60
55
75
75
102
90
122
110
150
132
180
A faulty electrical connection will result in da-
ACHTUNG!
mage to the motor.
– Pump/installation must be earthed in compliance with regu-
lations.
– A thermal or magnetic motor protection switch and an aM-
fuse are required to protect the motor.
– Motor connections (fig. 3/4):
a = black,
b = blue,
c = brown,
d = green/yellow
– direct starting : see Fig. 3
– star delta starting : see Fig. 4
6 Operation
6.1
Controlling the direction of rotation:
To determine the correct direction of rotation for the pump, only
the delivery pressure at the well head needs to be checked, ta-
king into account that the correct motor direction of rotation ge-
nerates the greater pressure.
– To rectify an incorrect direction of rotation swap any two pha-
ses in the switchbox or motor protection switch.
6.2
Operation
The pump must never run while dry, not even for
ACHTUNG!
beief periods.
– All electrical connections, protection switch settings and fuse
values must be re-checked.
– Measure the current values at each phase connection and
compare the measured values with those on the pump rating
plate,
– The nominal motor current values given here may not be ex-
ceeded.
– Check the mains power supply with the motor running.
Permissible tolerance: +6%, -10% at 50 Hzand ±6% at 60
Hz.
– The pressure pipe must be fully vented to avoid water ham-
mering when starting up.
50 Hz
60 Hz
Current at 400 V
[A]
5,9
7,8
10
13,7
16
23,3
31,3
38,5
45,3
61,8
73
89,5
108
144
187
220
248
– If the pump's electric motor is operated with an electronic
starter (smooth start-up), a frequency converter or a star-
delta starter, the settling time between 0% and 60% is to be
set to a maximum of 1 sec. The start from 60 to 100% must
occur in 3 seconds, to avoid damaging the motor.
If a frequency converter is used, the following values should
not be exceeded:
– max. speed due to increased voltage 500 V/µs
– max. voltage peak 1000 V
The frequency converter should be corrospond to EN 60034.
If the above values are exceeded, an RC or LC filter must be
fitted that observes the maximum values.
ambient temperature
The nominal power of submersible motor-driven pumps is re-
ached if the surrounding water temperature does not exceed
30 °C. To guarantee effective cooling, the circulating speed of
the cooling water over the surface of the motor must be at le-
ast 8 cm/s for 4" motors and 16 cm/s for 6" and 8" motors. In
the case of re-windable motors, please contact your nearest
sales office.
To guarantee that the engine is cooled at higher temperatures,
the capacity must be reduced in proportion to the motor power
(see table below).
Water temperature: Max. nominal motor current value (%)
4 kW
35°C (95°F)
100
40°C (104°F)
100
45°C (113°F)
90
50°C (122°F)
80
55°C (130°F)
70
Under no circumstances must the motor be ope-
ACHTUNG!
rated at ambient temperatures greater than 55 °C!
– The freezing point of the motor's liquid filling is – 8 °C.
The pump must never be operated for any length
ACHTUNG!
of time against a fully closed shut-off valve, since
during this time cooling of the motor is not guar-
anteed. Furthermore, the life of the pump will be
reduced if the winding heats up.
7 Maintenance
efore carrying out any maintenance work, switch off
B
the pump and ensure that it cannot be switched on
again by unauthorised people. Never carry out work
on a running pump.
– No special maintenance is required during normal operation.
7.1
Spare parts
Please contact Wilo Customer Service directly for spare parts,
standard replacements or repairs to the hydraulic pump parts.
ENGLISH
5,5 to 22 kW
> 22 kW
100
88
88
75
76
62
62
48
48
20
11
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