Group Description; Electric Connections - BOMBAS IDEAL SVAT Serie Manual De Instalación, Montaje Y Mantenimiento

Bombas Ideal, S.A.

3. GROUP DESCRIPTION

The SVAT-SVHT submersible pumps, provided with propeller/helicoidal impeller, are expressly designed
for lifting considerable flow rate capacities. They are extremely suitable for pumping rainfall deposits,
purifying stations, ground drying, irrigations, rice fields, waste drains, power plant cooling systems, etc.
Thanks to the high efficiencies obtained by this kind of pump, they are particularly recommended for the
above plants.
It's important to observe the following operational limits:
Maximum water temperature 40ºC.
PH: 5-9
Maximum submergence depth : 10 mts.
The SVAT-SVHT pumps have strong and compact structure. Pump and motor are close coupled and,
thus giving a very solid unit with easy installation. SVAT-SVHT pumps have been designed for vertical
installation.
The erection is quite simple, as the pump is fixed by its own weight and installed inside a waste piping or in
a concrete civil work chamber.
The submersible motor makes a compact unit with the hydraulic part. It is three phase, have IP68
protection and Class F insulation for use up to 155º C. The rotor shaft rotates on free-maintenance ball
bearings permanently lubricated. A set of high quality mechanical seals, operating in an oil bath and
situated between the pump and the motor, brings about complete leak-tightness.
Following control functions are incorporated in the unit:
Winding control temperature.
-
- Humidity sensor on oil bath.
The connexion diagram is showed in (Fig.10-11)

4. ELECTRIC CONNECTIONS

Prior to starting the following points shall be duly verified:
a) The mains voltage is exactly the same as that stated on the group plate.
b) In case of a direct start, as show in the figs. 10
c) In case of a star-delta start, there are two cables leaving the motor which shall appropriately
connect to the control panel.(Fig.11)
d) In every case the ground connection shall be connected in order to avoid any undue accidents.
e) Temperature control in the stator: the stator is protected by a thermal sensor incorporated in the
motor to protect against overheating due to dry running, high temperature in the fluid, etc.
f)
Humidity sensor: On the oil bath, connexion box, and motor chamber one electrode is placed
to control the leak-tightness. Normal resistivity is ≥100 KΩ, in case of water entrance or humidity,
the resistivity drops down to ≤ 30KΩ.
g)The sense of rotation must be verified too. Phase sequence will be changed if requested.