Emerson 400518-01 installation manual AC Supplies Requiring Transformers

Models: 400518-01

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Figure 8: Earth Grounded Delta Distribution Transformer, 240 Vac 3Ø

Safety Information

Product Overview

 

 

Installation

Diagnostics

Options and Accessories

Specification

DISTRIBUTION PANEL

 

L3

 

SECONDARY

L2

 

 

 

230 Vac

 

To Fusing and

 

 

 

L1

Drive Terminals

No Fuse

 

(N)

 

AC Supplies Requiring Transformers PE

(Protective Earth)

EARTH

GROUND

NOTE: For single phase drives using lines L1 & L2 or L1 & L3, only one fuse is required on the high leg (L2 or L3). Lines L2 & L3 may be used to balance the load, requiring two fuses.

Figure 8: Earth Grounded Delta Distribution Transformer, 240 Vac 3Ø

DISTRIBUTION PANEL

Manual background L3

SECONDARY

Typ. 240 Vac

Manual background L2

Manual background L1

Manual background PE (Protective Earth)

EARTH

GROUNDN Used only for 120 Vac operation with L1 or L2.

NOTE: L3 is a high leg, 208 Vac from Neutral/PE.

For single phase drives it is best to use lines L1 and L2.

L1 & L3 or L2 & L3 maybe used to balance loads.

Figure 9: Three Phase Delta (with mid-phase GND) Distribution, 120 Vac split/240 Vac 3Ø supply

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.

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Emerson 400518-01 AC Supplies Requiring Transformers, Earth Grounded Delta Distribution Transformer, 240 Vac 3Ø