Electrical Connection - EBARA SWS Série Manuel D'installation Et D'entretien

It is very important that both the suction and impulsion piping are independently supported and correctly fixed in place
so that the pump does not have to support their weight nor the vibration produced by the water flow though them. In
a situation where a long length of impulsion piping is used, we recommend the installation of a check valve to prevent
the water hammer produced by the return of the water causing any damage when the pump stops.
If flexible piping is employed, it should be the non-compressible type.
When making the connections to the pump, totally clean connections should always be used, with the thread in perfect
conditions and leak-tightness should be obtained only through the use of Teflon tape, (glues or similar products should
not be employed). These connection should be slowly tightened, with special care not to strip the internal thread of
the pump by over-tightening.

8. ELECTRICAL CONNECTION

Before carrying out any maintenance on the electrical part of the motor, it should be disconnected from the
electricity supply.
System protection should be based on a differential breaker (Ifn = 30 mA). A GOOD EARTH CONNECTION MUST
BE MADE WHENEVER POSSIBLE. The earth terminal, in particular, must be connected to the yellow/green conductor
of the supply cable. An earth conductor that is longer than the phase conductors must also be used so as to prevent it
from being the first to disconnect if pulled.
All our single-phase motors incorporate thermal protection that will disconnect the pump if the motor temperature
increases due to an overload and will then connect the electricity supply again once the temperature has dropped to
within normal levels again.
For three-phase versions, the user should provide appropriate protection in accordance with current regulations.
It is essential to connect the pump to a suitable ground.
The following diagram, should be used when making the electrical connections to the pump terminals.
Use is only permitted if the electric installation has safety protection systems in accordance with personal safety
regulations in force in the country where the product is to be installed.
9
ENGLISH