Ac Supplies Requiring Transformers - Emerson Epsilon EP Drive 400518-01 Installation Manual

Safety Information Product Overview
DISTRIBUTION PANEL
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:
NOTE: L3 is a high leg, 208 Vac from Neutral/PE.
Figure 9:

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.
12
Installation
SECONDARY
EARTH
GROUND
Earth Grounded Delta Distribution Transformer, 240 Vac 3
DISTRIBUTION PANEL
SECONDARY
EARTH
GROUND
For single phase drives it is best to use lines L1 and L2.
L1 & L3 or L2 & L3 maybe used to balance loads.
Three Phase Delta (with mid-phase GND) Distribution,
120 Vac split/240 Vac 3Ø supply
Options and
Diagnostics
Accessories
L3
L2
230 Vac
To Fusing and
Drive Terminals
L1
No Fuse
(N)
PE
(Protective Earth)
Typ. 240 Vac
(Protective Earth)
Used only for 120 Vac operation
with L1 or L2.
Specification
Ø
L3
L2
L1
PE
N