en – Original instructions
25
4.3.3 Power supply connection
WARNING: Electrical hazard
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 paragraph Wait times on page 29.
WARNING:
Only connect the electronic drive to Safety Extra Low Voltage circuits (SELV = very low safety
voltage). Circuits intended for use with external communication and control equipment are
designed to ensure insulation from the dangerous adjoining circuits inside the unit. Communication
and control circuits inside the unit are floating in relation to the mass and are classed as SELV.
They must only be connected to other SELV circuits, in order to maintain all the circuits within the
SELV limits and avoid mass loops. The physical and electric separation of the communication and
control circuits from non-SELV electric circuits must be maintained both inside and outside the
inverters.
Power supply wiring procedure
Also see Design and layout on page 17.
1. Open the terminal box cover, remove the screws.
2. Insert the power cable in the M20 cable gland.
3. Connect the cable according to the wiring diagram. See the figure below.
4. Connect the earth conductor (mass), making sure that it is longer than the phase conductors.
5. Connect the phase leads.
6. Close the cover and tighten the screws.
ESM_M0007_D_sc
N
1
2
3
L
1~
MCB - RCD
208÷240
380÷460
3~
1
L1
L2
L3
4
3
2
L1
L2
L3
MCB - RCD
