time. The pulse voltage can almost double at the motor terminals, depending on the
attenuation and reflection properties of the motor cable and the terminals. This can cause
additional stress on the motor and motor cable insulation.
Modern variable speed drives with their fast rising voltage pulses and high switching
frequencies can generate current pulses that flow through the motor bearings. This can
gradually erode the bearing races and rolling elements.
d
u
/d
t
filters protect motor insulation system and reduce bearing currents. Common mode
filters mainly reduce bearing currents. Insulated N-end (non-drive end) bearings protect the
motor bearings.
■
Requirements table
These tables show how to select the motor insulation system and when a drive d
u
/d
t
and
common mode filters and insulated N-end (non-drive end) motor bearings are required.
Ignoring the requirements or improper installation may shorten motor life or damage the
motor bearings and voids the warranty.
Guidelines for planning the electrical installation 77
Содержание ACS880-14
Страница 1: ...ABB INDUSTRIAL DRIVES ACS880 14 drive modules 132 400 kW 200 400 hp Hardware manual...
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Страница 114: ...With twin connectors in the control panel holder 1 2 3 1 114 Electrical installation...
Страница 115: ...With FDPI 02 modules OPEN TERMIN ATED 1 1 2 2 OPEN TERMINATED 3 Electrical installation 115 11...
Страница 142: ...4 5 6 3 3 1 1 1 1 2 142 Installation example with full cabling panels option H381...
Страница 150: ...150 Installation example with full cabling panels option H381...
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Страница 204: ...Standard configuration 204 Dimension drawings...
Страница 205: ...Location of power cable connection terminals with options H370 H356 3AXD50000038012 Dimension drawings 205...
Страница 206: ...Drive module with options 0B051 H356 0H371 206 Dimension drawings...
Страница 207: ...Configuration with option H381 3AXD50000323210 Dimension drawings 207...
Страница 208: ...LCL filter module 208 Dimension drawings...
Страница 212: ...External control unit 3AXD50000011687 212 Dimension drawings...
Страница 230: ...Declaration of conformity 230 The Safe torque off function...
Страница 236: ...Combi screw M8 30 Hex 20 N m 14 75 lbf ft Tapping screw M6 12 Torx T30 Hex 8 N m 71 lbf in 8 10 9 11 12 236...
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