Xylem Flygt 3201, Installation Operation & Maintenance, Page: 23 / 48

Make the electrical connections
General precautions
Electrical Hazard:
• A certified electrician must supervise all electrical work. Comply with all local codes and
regulations.
• Before starting work on the pump, make sure that the pump and the control panel are
isolated from the power supply and cannot be energized. This applies to the control
circuit as well. If the pump is equipped with automatic level control, there is a risk of
sudden restart.
• Leakage into the electrical parts can cause damaged equipment or a blown fuse. Keep
the end of the motor cable above the liquid level.
• Make sure that all the conductors that are not used are insulated.
• There is a risk of electrical shock or explosion if the electrical connections are not
correctly carried out or if there is fault or damage on the product.
Requirements
These general requirements apply for electrical installation:
• The supply authority must be notified before installing the pump if it will be connected
to the public mains. When the pump is connected to the public power supply, it may
cause flickering of incandescent lamps when started.
• The mains voltage and frequency must agree with the specifications on the data plate.
If the pump can be connected to different voltages, the connected voltage is specified
by a yellow sticker close to the cable entry.
• The fuses, short-circuit, and circuit breakers must have the proper rating, and the
pump overload protection (motor protection breaker) must be connected and set to
the rated power according to the data plate. The starting current in direct-on-line
starting can be up to six times higher than the rated current.
• The fuse rating and the cables must be in accordance with the local rules and
regulations.
• If intermittent operation is prescribed, the pump must be provided with monitoring
equipment supporting such operation.
• The motor is convertible between different voltages, as stated on the data plate. This
conversion is done on the terminal board.
Cables
These are the requirements to follow when you install cables:
• The cables must be in good condition, not have any sharp bends, and not be pinched.
• The sheathing must not be damaged and must not have indentations or be embossed
(with markings, etc.) at the cable entry.
• The cable entry seal sleeve and washers must conform to the outside diameter of the
cable.
• The minimum bending radius must not be below the accepted value.
• If using a cable which has been used before, a short piece must be peeled off when
refitting it so that the cable entry seal sleeve does not close around the cable at the
same point again. If the outer sheath of the cable is damaged, then replace the cable
(contact an Xylem service shop).
Installation
Flygt 3201 Installation, Operation, and Maintenance Manual 21