caprari D Serie Instrucciones De Servicio página 13

5.3 Mechanical connections (series MA/MSA only):
5.4 Hydraulic connections:
Connection to the delivery mouth is achieved by means of a threaded gas coupling. In series DR/DSR alone, the delivery union is preset for the
5.5 Electrical connections and information:
In single-phase electric pumps without connection plugs, the power supply cable condists of two line conductors plus one ground
conductor. Threephase types have three line conductors plus one ground conductor.
All yellow-green grounding conductors must be connected to the grounding circuit of the system before the other conductors are
connected. The grounding conductors must be the last to be removed if the motor is disconnected.
The free ends of the cables must never be immersed or wetted in any way.
each phase from the mains supply and with a gap of at least 3 mm between its contacts.
The insulation resistance must never be less than 5MΩ in air and 2MΩ in water with a test voltage of 500Vdc.
Electrical equipment
Check that the electric control panel complies with the current accident-prevention standards and provisions. In particular, the
protection degree should suit the place of installation.
+40°C). Failing this, install a special version of the equipment.
ATTENTION Check that the thermic relay is set to a value that is no higher than the rated current value on the data plate of the electric
pump.
ATTENTION The contacts of undersized or poor quality electrical equipment will quickly deteriorate. The motor power supply will consequently
become unbalanced and could damage the motor itself.
Unless it is correctly researched and implemented, use of the INVERTER and SOFT-STARTER can damage the pumping unit. Ask
equipment will ensure reliable and safe operation. Check that the electric equipment has all the components required in order to ensure correct
etc.).
Power supply voltage
ATTENTION Check that the voltage and frequency values of the electricity main correspond to those on the data plate of the electric pump. If
permitted for motors with a single voltage rating of 230/400V or 400/700V since they can also be used at rated voltage values of
220, 240, 380 and 415V.
Operation with two different voltage ratings is possible for threephase motors not homologated according to EN 60335-2-41
1) set the electric pump in a stable vertical position;
2) if the electric pump has already been used, clean it on the outside to prevent the internal parts of the electric motor from being dirtied;
4) lift the cover alone and, taking care not to pull the conductors, position it in such a way as to allow access to the internal electrical connections
internal terminal strip, it will be necessary to modify the internal connection from star to delta);
7) evenly tighten the previously removed nuts or bolts.
Wiring diagram for threephase electric pumps with terminal strips
Δ Connection
W2 U2
U1 V1
L1
Caprari S.p.A.
V2
W1
L2 L3
D - M / DS - MS
Installation of good quality electrical
Y Connection
W2 U2 V2
U1 V1 W1
L1 L2 L3
GB
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