Emerson FM-3 Guia do Utilizador descarregar pdf (Página 105)

100

101

Epsilon Eb and EN Drives Reference Manual

Figure 55: Earth Grounded WYE Distribution Transformer

Figure 56: Earth Grounded Delta Distribution Transformer

AC Supplies Requiring Transformers

If the distribution transformer is configured as shown in the figures below, an isolation

transformer is required.

If an isolation transformer is used between the power distribution point and the drives, the

transformer secondary must be grounded for safety reasons as shown in the figures below.

Figure 57: Three Phase Delta (with mid-phase GND) Distribution to a Three-Phase

Delta/WYE Isolation Transformer

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