Planning the electrical installation
42
Motor cable shield
To function as a protective conductor, the shield must have the same cross-sectional
area as a phase conductor when they are made of the same metal.
To effectively suppress radiated and conducted radio-frequency emissions, the
shield conductivity must be at least 1/10 of the phase conductor conductivity. The
requirements are easily met with a copper or aluminium shield. The minimum
requirement of the motor cable shield of the drive is shown below. It consists of a
concentric layer of copper wires with an open helix of copper tape. The better and
tighter the shield, the lower the emission level and the bearing currents.
Protecting the relay output contacts and attenuating disturbances in case
of inductive loads
Inductive loads (relays, contactors, motors) cause voltage transients when switched
off.
The relay output on the drive is protected with varistors (250 V) against overvoltage
peaks. In addition, it is highly recommended to equip inductive loads with noise
attenuating circuits (varistors, RC filters [AC] or diodes [DC]) in order to minimize the
electromagnetic emissions at switch-off. If not suppressed, the disturbances may
connect capacitively or inductively to other conductors in the control cable and form
a risk of malfunction in other parts of the system.
Insulation jacket
Copper wire screen
Helix of copper tape
Cable core
Inner insulation
Summary of Contents for ACSM1 Series
Page 1: ...ACSM1 Hardware Manual ACSM1 04 Drive Modules 0 75 to 45 kW...
Page 2: ......
Page 4: ......
Page 14: ...Table of contents 14...
Page 20: ...About this manual 20...
Page 24: ...The ACSM1 04 24...
Page 30: ...Planning the cabinet assembly 30...
Page 46: ...Planning the electrical installation 46...
Page 70: ...Maintenance 70...
Page 84: ...Technical data 84...
Page 90: ...Mains filters 90...
Page 96: ...Dimension drawings 96 Frame size A...
Page 97: ...Dimension drawings 97...
Page 98: ...Dimension drawings 98 Frame size B...
Page 99: ...Dimension drawings 99...
Page 100: ...Dimension drawings 100 Frame size C air cooled module...
Page 101: ...Dimension drawings 101...
Page 102: ...Dimension drawings 102 Frame size C for cold plate mounting...
Page 103: ...Dimension drawings 103 Frame size D air cooled module...
Page 104: ...Dimension drawings 104 Frame size D for cold plate mounting...
Page 106: ...Dimension drawings 106 Mains filters type JFI xx...
Page 108: ...Dimension drawings 108 Braking resistors type JBR xx...
Page 110: ...Dimension drawings 110...
Page 111: ......