Electrical Connection - EBARA SB 3 Instrucciones De Instalación, De Uso Y Mantenimiento

• If the diameter of the well is quite bigger than the electropump, it is better to install another jacket,
external to the motor; this is to grant that the cooling water speed is ≥ 0,1 m/s.
• Place the electropump keeping it away from the bottom of the well (X); this is to avoid a bad cooling
due to sediments; the dinamic level (A) of the well must not influence its work. Grant electrical pro-
tections and automatic level controls (3) to the installation.
• Always install, at least, one non-return valve (6) at the surface to protect the pump against water ham-
mers due to the plant before the valve.
The horizontal installation of the group must be specified to the order, bearing in mind that: the pump
axis must be 0,5 m over the bottom, the air of the plant could easily evacuate, an external non-return
valve must be installed.

ELECTRICAL CONNECTION

After installing the unit check again the feeding cable following the CABLE CONNECTION instructions
and connect it to the control panel (1) that must be fitted, according to the actual rules, with:
• An omnipolar device for switching-off/separation of the net (minimum opening contacts 3 mm).
• A protection against short circuits (Am fuse) and magnetothermics, rated in compliance with the cur-
rent plate.
• Possible devices against: lack of phases, electric dissipations, lack of water, atmospheric discharges
and functioning-failure indicators.
IMPORTANT
ALL THE ELECTRIC MASSES MUST BE CONNECTED TO THE EARTH OF THE PLANT.
ALL THE CONNECTIONS MUST BE EXECUTED ACCORDING TO THE LAW BY QUALIFIED STAFF.
FIRST RUNNING
• With discharge gate (5) complitely opened nomore air should leak from the pipings. Close almost
complitely the gate and start the electropump waiting for the exit of clean water without air bubbles.
Close the gate and control on the pressure-gauge (4) that the maximum pressure data corresponds to
the one shown in our catalogue, it not, reverse the sense of rotation of the motor only for three phase
types.
• Gradually open the gate and run the pump until clean water is coming out. If the well has correctly been
builted and previously bleeded, clean water will come out in 15 min.
• During the previous instructions control voltage and current; admitted intermittent rush of current of
±5% for voltage and current referred to plate data.
STANDARD RUNNING
Execute the hydraulic connection of the group to the distributing plant, check during some working cycles
voltage and current data; if necessary retouch the delivery, pressure and electric protection settings.
ATTENTION
• NEVER RUN THE PUMP DRY.
• NEVER LET THE PUMP WORK WITH CLOSED GATE FOR MORE THAN 2 MIN.
• NEVER LET THE PUMP RUN IN THE OPPOSITE DIRECTION FOR MORE THAN 30 SEC.
MAINTENANCE
Often control the plant trying to eliminate the disturbing causes such as sand, lime, ecc. Keep efficient
the parts exposed to damages (valves, filters, detectors and protections). For interventions always call
qualified technicians. In case of long rests provide to often start the electropump.
ATTENTION:
BEFORE ANY MAINTENANCE INTERVENTION ENSURE THAT THERE IS NO PRESSURE IN THE PLANT.
TAKE OFF THE POWER SUPPLY.