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ELECTRICAL CONNECTIONS
Electric connection must be carried out perfectly by component personnel. All control equipment must be installed at the
right level for preventing any flooding risk.
WARNING!
The complete electric plant must be
ear-
thed, both as regards the electric pump
and the eventual control equipment.
Check that voltage, frequency, starting and control comply with the plate values.
N.B. : The pump for 400 Volt can be used with a tension from 380 to 415 Volt.
CONNECTION OF LEAD MOTOR CABLE TO THE FEEDING CABLE.
For a correct connections it's necessary to know the number of cores, any eventual monitoring equipment and type of starting (see
data plate).
A
N°1 4 Wire cable
C
N°1 6 or 7 Wire cable
The pumps are supplied for direct or starting or star-delta starting. See data plate.
NOTE : For safety reasons, the earth cable of the pump must be longer than the other ones.In fact, in case of stripping,
the earth cable must be the last one to be disconnected. This is valid for both cable ends.
MOTOR PROTECTION
When the electric pump is supplied with of 7 or 10 wire cable or with additional control cable marked T1 - T2 and S, means that the
pump is equipped with:
- Detectors against motor overheating /thermal probes) - Cable T1 and T2
They are bimetallic switches, normally closed , connected in series to the motor winding, which open when temperatu re exceedes
125°C and cut-off power supply to the coil of the main contactor stopping the pump.
Coil is powered again when temperature of bimetallic switches falls to 107°C.
It's advisable to make connection at 24 Volt- 1.5 A., but it's possible to operate up to a max.voltage of 250 Volt. having a max. capacity
of 16 A with cos..= 0.6.
It's also advisable to install a relay to keep "on" a warning confirming the interrvention of the termal detector.
The lamp can be switched off by hand only.
- Moisture sensor; wires marked S.
When foreseen for its use en alarm unit typeCLB 3S-230V +DS is available..
DIRECT STARTING
The motor starting device must always be provided with 3 poles differential thermal relay, self compensated for protection against
overload and/or phase phailure. Rated amperage must comply the value reported on the pump plate: a max. increase of 5% is
acceptable.
ELECTRIC DIAGRAMS - 50 / 60 Hz (see page 27)
fig. 1 - Star connection
fig. 2 - Delta connection
fig. 4 - Star connection
fig. 5 - Delta connection
ELECTRIC DIAGRAMS PAGE 27
WARNING !
Installation of electric equipment must
be carried out complying with local
safety regulation.
13
With control device
and protection
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