Emerson Epsilon Eb Digital Servo Drive Manuale di Installazione Scaricare il pdf (Pagina 31)

Installation

Figure 10: Single Phase Power Supply Connections

Transformer Sizing

If your application requires a transformer, use the following table for sizing the KVA rating.

The values in the table are based on “worst case” power usage and can be considered a

conservative recommendation. You can down-size the values only if the maximum power

usage is less than the transformer continuous power rating. Other factors that may influence

the required KVA rating are high transformer ambient temperatures (>40° C or >104° F) and

drive operation near the maximum speeds.

Transformer output voltage drop may become a limiting factor at motor speeds and loads near

maximum ratings. Typically, higher KVA transformers have lower voltage drop due to lower

impedance.

Drive/Motor Combination Suggested KVA Rating

Eb-202/NT-207 1.0

Eb-203/NT-207 1.0

Eb-202/NT-212 1.2

Eb-203/NT-212 1.7

Eb-203/MG-316 2.3

Eb-205 / MG-340 3.0

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Emerson Epsilon Eb Digital Servo Drive Manuale di Installazione Pagina 31