en – Original instructions
23
4.3 Electrical Installation
DANGER: Electrical hazard
The connection to the electric power supply must be completed by an electrician possessing the
technical-professional requirements outlined in the current regulations.
4.3.1 Electrical requirements
Local directives prevail on the specific requirements indicated below.
Electrical connection check list
Check that the following requirements are met:
•
The electrical leads are protected from high temperature, vibrations, and collisions
•
The main power supply current and voltage must meet the specifications on the data plate on
the unit
•
The power supply line is provided with:
- A mains isolator switch with a contact gap of at least 3 mm.
•
Ground fault circuit breaker (GFCI), or residual current devices (RCD), also known as
automatic earth leakage circuit breakers (ELCD); comply with the following:
- For single-phase power supply versions use GFCI (RCD), which are capable of detecting
alternate currents (AC) and pulsing currents with DC components. These GFCI (RCD) are
marked with the following symbol
- For three-phase power supply versions use GFCI (RCD), which are capable of detecting
AC and DC currents. These GFCI (RCD) are marked with the following symbols
- Use GFCI (RCD) with a starting delay, to avoid problems due to transient earth currents.
- The size of the GFCI (RCD) must comply with the system configuration and the
environmental conditions.
NOTE:
When selecting an automatic earth leakage circuit breaker or a ground fault circuit breaker, make
sure to consider the total earth leakage current of all the electric devices of the system.
The electrical control panel checklist
NOTE:
The control panel must match the ratings of the pump unit. Inappropriate combinations do not
guarantee the protection of the unit.
Check that the following requirements are met:
•
The control panel must protect the pump against short-circuit. A time lag fuse or a C type
circuit breaker (MCB) can be used to protect the pump.
•
The pump is fitted with thermal and overload protection.
DANGER: Electrical hazard
•
Before completing any electrical connections, make sure that the unit and the electric panel
are isolated from the power supply and cannot be energized.
•
Contact with electric components may cause death, even after the unit has been switched off.
•
Before any interventions on the unit, the network voltage and any other input voltages must be
disconnected for the minimum time indicated in Wait times on page 29.
