Mains Types/Conditions; Interaction With Compensation Equipment; Specification Of All Cables Used - Lenze 9300 Operating Instructions Manual

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Installation
4.2.4 Mains types/ conditions
Please observe the restrictions for each mains type!
Mains
With grounded neutral With grounded neutral
(TT/TN mains)
With isolated neutral
(IT mains)
With grounded phase
DC-supply via + U
4.2.5

Interaction with compensation equipment

•
The controllers take up a very low fundamental reactive power from the supplying AC mains.
Therefore compensation is not necessary.
•
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

Specification of all cables used

•
The cables used must comply with the required approvals of the application site
(e. g. UL).
•
The prescribed minimum cross-sections of 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.
•
The screening quality of a cable is determined by
– a good screen connection
– a low screen resistance
Only use screens with tin-plated or nickel-plated copper braids!
Screens of steel braid are not suitable.
– For the overlapping degree of the screen braid:
A min. of 70 % to 80 % with an overlapping angle of 90°
4-12
Operation of the controllers
No restrictions No restrictions
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 separated from the mains
immediately.
Operation is only possible with one variant
/-U The DC voltage must be symmetrical to PE.
G G
BA9300POS EN 2.3
Notes
Observe controller ratings Observe controller ratings ^
•
Mains r.m.s. current: 3-3
Safe operation in the event of an earth fault at the
inverter output cannot be guaranteed.
Contact Lenze
The controller will be destroyed when grounding + U
-U .
G
or
G