Safety Information | Product Overview |
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Installation
Diagnostics
Options and Accessories
Specification
DISTRIBUTION PANEL
| L3 |
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SECONDARY | L2 |
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230 Vac |
| To Fusing and |
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| L1 | Drive Terminals |
No Fuse |
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(N) |
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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
L3
SECONDARY
Typ. 240 Vac
L2
L1
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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