Siemens 6SL3210-1SE17-7AA0 [61/318] Operation of the line connection components via an isolating transformer

Siemens 6SL3210-1SE21-8AA0 [61/318] Operation of the line connection components via an isolating transformer
Mains connection and line-side power components
2.9 Line connection variants
Manual
Manual, 01/2011, 6SL3097-4AC10-0BP2
61
2.9.4 Operation of the Line Connection Components via an Isolating Transformer
The isolating transformer converts the type of the line supply type in the plant (e.g. IT/TT line
supply) to a TN line supply. Additional voltage adaptation to the permissible voltage
tolerance range is possible.
An isolating transformer must be used in the following cases:
The insulation of the Power Module and/or the motor is not adequate for the voltages that
occur.
There is no compatibility to an existing residual-current protective device.
The installation altitude is greater than 2000 m above sea level.
For all other systems that are not TN line supply systems with grounded neutral
conductor, a line filter should always be used.
CAUTION
If the line supply voltage is greater than 3-ph. 480 V AC +10% or 1-ph. 240 V AC +10%, it
is not permissible that an autotransformer is used.
In order to ensure protective separation, an isolating transformer must always be used.
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Figure 2-20 Isolating transformer

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