Flexit L12 X, Operating Instructions Manual

8

4  electrical Works

All electrical works must be performed by an authorised electrician.

•  See the separate instructions for the automatic control and its installation.

•  See the separate wiring diagram in the unit for external connections.

•  See also Chapter 9 technical Data for more information on electrical wiring.

•  A service switch must be installed for all-pole breaking of the supply voltage to the unit. this is not included 

in the supply from FlexIt.

•  the electrical components must not be exposed to temperatures lower than -23

0

C

or higher than +55

0

C

.

4.1  Main Supply (Mains Cable)

For the L50, 3 supply cables are required, 1 for the automatic control and 2 for the electric battery (there are 2 electrical 

groups). Only 1 supply cable is required for the other units.

See the separate table in Chapter 9 Technical Data for the exact dimensions of each unit.

4.2  Connection of external Components

See the separate wiring diagram enclosed with each unit. All electrical connections must be installed by qualified 

electricians.

4.3  earth-leakage Circuit-breaker

The frequency converter must be earthed to comply with the regulations concerning high leakage 

currents (over 3.5 mA). If a line-side earth-leakage circuit-breaker is used as protection in accordance 

with the installation regulations, an earth-leakage circuit-breaker type B must be installed, which 

functions even if there are DC components. See the symbol in Fig. 9.

tighten all terminal blocks before finishing the work to avoid heat generation in the contacts, which 

may result in fire in the worst case scenario.

Fig. 9  Earth-leakage 

symbol

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