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ACQ800-37 Hardware Manual
Selecting the power cables
General rules
Dimension the supply (input power) and motor cables according to local
regulations:
• The cable must be able to carry the drive load current. See chapter
data
• The cable must be rated for at least 70
conductor in continuous use. For US, see
page
• The inductance and impedance of the PE conductor/cable (grounding wire) must
be rated according to permissible touch voltage appearing under fault conditions
(so that the fault point voltage will not rise excessively when a ground fault
occurs).
• 600 V AC cable is accepted for up to 500 V AC.
We recommend shielded symmetrical multicore cables for input cabling. Single-core
cables are also allowed, but unshielded single-core cables are not on IT
(ungrounded) networks.
WARNING! Do not use unshielded single-core supply cables in IT (ungrounded)
networks. A dangerous voltage can become present on the non-conductive outer
sheath of the cable. This can cause injury or death.
Symmetrical shielded cable must be used for motor cabling; see section
power cable types
Note: When continuous conduit is employed, shielded cable is not required.
To operate as a protective conductor, the shield conductivity must be as follows
when the protective conductor is made of the same metal as the phase conductors:
Cross-sectional area of the phase
conductors
Compared to a four-conductor system, the use of symmetrical shielded cable
reduces electromagnetic emission of the whole drive system as well as motor
bearing currents and wear.
Note: The cabinet configuration of the drive may require multiple supply and/or
motor cabling. Refer to the connection diagrams in
The motor cable and its PE pigtail (twisted screen) should be kept as short as
possible in order to reduce electromagnetic emission as well as capacitive current.
for the rated currents.
61.
on page 60.
2
S (mm
)
S < 16
16 < S < 35
35 < S
°
C maximum permissible temperature of
Additional US requirements
Minimum cross-sectional area of the
corresponding protective conductor
2
S
(mm
)
p
S
16
S/2
Electrical
Planning the electrical installation
59
Technical
on
Alternative
installation.
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