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LINE CONFIGURATION FOR EUROPEAN MACHINE INSTALLATION
RS series lathes are designed to operate from a 3-phase AC incoming power source with an earth
star point, as shown in Figure 1.58, for a TN Network. This incoming line short circuit current must be
at least 2kA.
Due to the type of drive systems employed in the machine, it is not recommended to use a Resid-
ual-Current Device (RCD) in the machine electrical supply. The reason for this limitation is that an
RCD measures the leakage currents by checking that the sum of all supply phases totals zero. In the
case of the drive systems installed in this machine, during the operation of the machine there is regen-
eration of power back to the supply, and the sum zero is not maintained, potentially causing the RCD
to trip.
Recommended Line Configuration - TN Network
Other Incoming Line Configurations
In other cases, such as those examples shown in Figures 1.59 and 1.60, an RCD Type B is required
to be fitted to the machine to meet the requirements of EN60204-1:2006 §6.3.3 b) and c). This will be
at extra cost. Details of the electrical supply should be supplied to your local Hardinge representative.
1-36
M-507C
Figure 1.58 - TN Network
Generator or
Transformer
Earth
Consumer
L1
L2
L3
N
PE
TI5643
Figure 1.59 - TT Network
Generator or
Transformer
Earth
Consumer
L1
L2
L3
N
Earth
TI5644
Figure 1.60 - IT Network
Generator or
Transformer
Consumer
L1
L2
L3
Earth
TI5645
Содержание T-51
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Страница 86: ...Hardinge Inc Elmira New York 14902 1507 USA Phone 607 734 2281 Fax 607 734 8819 www hardinge com ...