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.
• 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 unused conductors 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.
CAUTION:
If the pump is equipped with automatic level control and/or internal contactor, there is a
risk of sudden restart.
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 current according to the data plate and if applicable the cable chart. 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 thermal contacts must be in use.
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.
Installation
18 2125 Installation, Operation, and Maintenance Manual
To Next Page
Loading...
