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When to disconnect EMC filter and ground-to-phase varistor: TN-S,
IT, corner-grounded delta, and midpoint-grounded delta systems
Symmetrically grounded TN systems (TN-S systems)
Do not disconnect EMC AC and VAR wires.
PE
L2
L3
L1
N
Corner-grounded delta systems
Do not install the drive on a corner-grounded system.
PE
L3
L2
L1
Midpoint-grounded delta systems
Do not install the drive on a midpoint grounded system.
PE
L3
L2
L1
IT systems (ungrounded or high-resistance grounded [>30 ohms])
Disconnect EMC AC and VAR wires.
L3
L2
L1
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Guidelines for installing the drive to a TT system
The drive can be connected to a TT system under these conditions:
98 Electrical installation
Summary of Contents for ACQ580-34
Page 1: ... ABB DRIVES FOR WATER ACQ580 34 drive modules Hardware manual ...
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Page 122: ...122 ...
Page 132: ...Dimension drawing 132 External control unit option P906 ...
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Page 184: ...Standard configuration E208 and E210 included 184 Dimension drawings ...
Page 185: ...Drive module with option B051 Dimension drawings 185 ...
Page 186: ...Drive module with options B051 H370 186 Dimension drawings ...
Page 187: ...LCL filter module Dimension drawings 187 ...
Page 190: ...190 ...
Page 208: ... Declaration of conformity 208 The Safe torque off function ...
Page 214: ...214 ...
Page 226: ...226 ...