Lenze EMB934x - Manual (Page 102)

Electrical installation
Important notes
Electrical isolation
5
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102 EDBMB9340 DE/EN/FR 12.0
5.1.2 Electrical isolation
The control connections (X2) are double−insulated (safe electrical isolation to
EN 61800−5−1). The protection against accidental contact is ensured without any further
measures.
If an external voltage supply (24V DC) is used, the insulation level of the regenerative
power supply depends on the insulation level of the voltage source.
Mains DC bus
L1 L2 L3 +UG −UG PE
Mains
synchronisation
L3’ Power circuit
L2’
L1’
L3.2
L2.2
L1.2
Control circuit
E1 59 39 A2 A1 PE
Basic insulation
Double / reinforced insulation
Fig. 5−1 Electrical isolation