6 Electrical Installation
WARNING
The electrical installation must be carried out by qualified electricians according to the
general and regional safety and installation directives.
The documentation and device specification must be complied with during installa-
tion.
Before any assembly or
connection work, discharge the frequency inverter. Verify that
the frequency inverter is discharged.
Do not touch the terminals because the capacitors may still be charged.
Only connect suitable voltage sources. The nominal voltage of the frequency invert
must correspond to the supply voltage.
The frequency inverter must be connected to ground potential.
If voltage supply is switched on, no covers of the frequency inverter may be re-
moved.
The connecting cables must be protected externally, considering the maximum volt-
age and current values of the fuses. The mains fuses and cable cross-
be selected according to EN 60204-1 and DIN VDE 0298 Part 4 for the nominal oper-
ating point of the frequency inverter. According to UL/CSA, the frequency
inverter is
suitable for operation at a supply network of a maximum of 480 VAC which delivers a
maximum symmetrical current of 5000 A (effective value) if protected by fuses of
class RK5. Only use copper cables with a temperature range of 60/75 °C.
The frequency inverters are to be grounded properly, i.e. large connection area and
with good conductivity. The leakage current of the frequency inverters may be > 3.5
mA. According to EN 50178 a permanent connection must be provided. The protective
conductor cross-section required for grounding the fixing plate must be selected ac-
cording to the size of the unit. In these applications, the cross-section must corre-
spond to the recommended cross-section of the wire.
CAUTION
Degree of protection IP20 is only achieved with terminals plugged and properly
mounted covers.
• The frequency inverter is suited for connection to the public or industrial supply
mains according to the technical data. If the transformer output of the supply
mains is ≤ 500 kVA, a mains commutation choke is only necessary for the fre-
quency inverters identified in the technical data. The other frequency inverters are
suitable for connection without a mains commutating choke with a relative mains
• It must be checked, based on the specifications of EN 61000-3-2, if the devices
can be connected to the public supply means without taking additional measures.
The frequency inverters ≤ 9.2 kW with integrated EMC filter comply with the
emission limits of the product standard EN 61800-3 up to a motor cable length of
10 m, without additional measures being required. Increased requirements in
connection with the specific application of the frequency inverter are to be met by
means of optional components. Commutating chokes and EMC filters are optional-
ly available for the series of devices.
• Operation on unearthed mains (IT mains) is admissible after disconnection of the
Y capacitors in the interior of the device.
48 Operating Instructions ACU 06/13
To Next Page
Loading...
Need help?
General
