Electrical Installation; Power Supply Cable Connection; Electric System; Electric Protections - DAB SMC6 Instrucciones Para La Instalación Y El Mantenimiento

7.

ELECTRICAL INSTALLATION

ATTENTION! ALWAYS RESPECT THE SAFETY REGULATIONS!!
Electrical installation must be carried out by an expert, authorised electrician,
who takes on all responsibility.
Scrupulously follow the instructions of the engine manufacturer and of the
electrical system.
THE SYSTEM MUST BE CORRECTLY AND SAFELY EARTHED!!
Always switch off the mains power supply before working on the electrical or
mechanical part of the system and make sure it cannot be switched on again
accidentally.
- We recommend to install upstream the motor a safety switch to protect
the motor against voltage drop or overload.
- Refer to voltage data on motor nameplate for its correct sizing.
- Leave 2 or 3 meters of cable more in case the terminal connection should
be changed.

7.1 Power supply cable connection

The supply cable should be selected according to the Ampere flow, showed on motor nameplate. If the cable is not supplied with the motor, it
should suit the following requirement:
a) Its section should correspond to the one recommended by the motor manufacturer according to carried power, installation depth and motor
starting system.
b) Warranty required: up to 600V in water.
c) Motor connection should be performed with extreme care.
d) The cable should show no cuts, cracks, scratches or other damages.
If two cables have to be joined in parallel, pay extreme attention when connecting cables of the same color.

7.2 Electric system

The motor is connected by the supply cable to the control panel which contains the necessary control and protection devices. Since every difficulty,
either mechanical or electric, will damage almost automatically the motor windings, it is necessary for the control and protection equipment to be
adequate and reliable. Economy may, in this case, produce unpleasant results. We recommend besides an efficient grounding of the control
panel.

7.3 Electric protections

In all case of:
DOL starting,
–
Star/ Delta starting,
–
Stator starting,
–
Autotrasformer,
–
1 - Electric pump
2 - Electric panel
3 - Gate gauge
4 - Pressure gauge
5 - Non-return valve
6 - Level control detectors
7 - Well grid
8 - Well bottom
9 - Main electric cable
10 - Canle clamps
11 - Well cover
A - Static level
B - Dynamic level
C - Distance from bottom of well
D - Distance from grid of well
Flanges should be provided with suited slots to accommodate
the wires. During the assembling use a suspension ring
fastened to the column pipe, to avoid dropping the pump in the well in
case of hoist failure or chain breaking.
ENGLISH

7.4 Rotation direction

Check motor rotation direction before coupling the motor to the pump, so
to avoid any damage to motor thrust bearing.
Find and mark by means of cyclic phase indicator, whose
pointer is turning clockwise, mains terminals L1, L2 and L3
and connect them to control panel terminals L1, L2 and L3.
20
FIGURE 8