Lenze EVS 9300 series, System Manual

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Installation
Electrical installation
4.2.4 Mains types/conditions
4-22
L
EDSVS9332S-B EN 3.0
4.2.4 Mains types/conditions
Please observe the restrictions for each mains type!
Mains Operation of the controllers Notes
With earthed neutral No restrictions Observe controller ratings With earthed neutral
(TT/TN mains) No restrictions Observe controller ratings
• Mains r.m.s. current:

3-4
With isolated neutral
(IT mains) Possible, if the controller is protected in the event of an
earth fault in the supplying mains.
• Possible, if appropriate earth fault detections are
available and
• the controller is immediately separated from the
mains.
Safe operation in the event of an earth fault at the
inverter output cannot be guaranteed.
With earthed phase Operation is only possible with one variant Contact Lenze
DC-supply via +U
G
/-U
G
The DC voltage must be balanced to PE. The controller will be destroyed when eaU
G
or
-U
G
.
4.2.5 Interaction with compensation equipment
z Controllers only consume very little reactive power of the fundamental wave from the AC
supply mains. Therefore, a compensation is not required.
z If the controllers are operated at mains with compensation, this equipment must be used with
chokes.
– For this, contact the supplier of the compensation equipment.
4.2.6 Cable specifications
z The cables used must comply with the required approvals of the application site (e. g. UL).
z The regulations concerning the minimum cross-sections of the PE conductors must be
maintained in all cases. The cross-section of the PE conductor must be at least as large as the
cross-section of the power connections.
z The efficiency of a shielded cable is determined by:
– A good shield connection
– A low shield resistance. Only use shields with tin-plated or nickel-plated copper braids!
Shields with steel braid are not suitable.
– The coverage of the braid (at least 70 % to 80 % with a coverage angle of 90 °)