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USE LIMITATIONS
For good operating of the motor, installed in a 3" well, it is necessary to follow these conditions:
- maximum depth of motor immersion is 100m.
- maximum allowable starts per hour: 30 at even intervals; an upper quantity means that the
programming of the hydraulic system is wrong.
- maximum allowable rating voltage fluctuation: -10%/+6%.
- maximum well water temperature: 35°C.
- the electric motor utilizes the water flow, produced by the pump, to assure a suitable heat
exchange not lower than 0.08m/sec.
It's possible to determine water speed applying the following formula:
V = 10.6Q/(Dp²-8760)
V = water flow speed (m/sec.)
Q = flowrate (lt/min)
Dp = well inner diameter (mm)
PRECAUTIONS AND PRELIMINARY CHECKS
During transportation and unpacking, care should be taken to avoid hitting the motor.
Check that the power cable has not been damaged.
Don't use the power cable to make the motor handling.
Motor power rating is adeguate for the required application.
The voltage and the frequency of the power source must agree with the specifications given on the
motor nameplate.
Don't unscrew the filling plug, there is no need to top up the coolant in this type of motor.
Clean up the well before installation of the motor-pump.
POWER CABLE AND DROP
The power supply cable must be suitable to immersion. The diagram below show the maximum
possible admitted length of the cable (unit of measure m) possible considering the cross section
of the conductors. Those schedules are true for a maximam voltage drop of3%with a working
temperature of 30°C.
MOTOR
OY3 050
OY3 075
OY3 100
OY3 050
OY3 075
OY3 100
OY3 150
Splicing the drop cable to the motor cable must be carried out through suitable resin filled kit,
following the producer's instructions and do not forget to join the core cable with the same colour
(black-blue-brown).
Hp
kW
4x1
0,50
0,37
50
0,75
0,55
38
1,00
0,75
30
0,50
0,37
240
0,75
0,55
164
1,00
0,75
133
1,50
1,10
97
7
DROP CABLE SECTION mm²
4x1.5
4x2.5
4x4
4x6
75
125
57
95
152
45
75
120
174
246
200
333
146
244
390
EN
4x10
4x16
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