Power Supply Connection - Calpeda I-MAT Instructions Pour L'utilisation

The choice of connecting cables depends on
several factors including the type of connection,
environmental conditions and type of plant.
Standard-compliant connection cables should be
chosen, paying attention to: manufacturer data,
EN
nominal voltage, degree of insulation, nominal
current, operating temperature and thermal effects.
- Do not lay cables on or near very hot surfaces
(unless they are cables intended for this type of
use).
- If mobile components of the system are used, use
cables with adequate elasticity.
- Place power cables and signal cables in separate
channels.
- Place power cables and signal cables on the
ground separately, using a star link to limit
possible signal disturbances or alterations.
- If necessary (also depending on the powers in play)
use diversified grounding bars for signal ground
connections and power ground connections.
- Check that the signal bars are not interfered with
currents of the power circuits, being sources of
possible disturbances coming from the control
system (PWM, high di/dt, etc.) or by connection
systems (brushes, crawling contacts etc.).
- Properly connect to fixed equipment by means of
cables as short as possible.
6.4.1. Immunity of the electrical connections
Particular attention must be given to the electrical
connections and to a good ground connection,
as the propagation of the disturbances received
and emitted by the inverter occurs through the
connection cables.
The tests carried on I-MAT demonstrate high
immunity to disturbances and low emission. The
following are some important wiring and installation
guidelines:
- The cable connections and the type of cable must
be chosen according to their function.
- Signal cables must be shielded with a minimum
coverage of 80%.
- For inverter-motor power cables the shield must
be connected at both ends..
- The cable shield should not be considered an
equipotential ground connection.
- Freewheeling diodes must always be installed
on the DC-controlled relays and RC groups on
AC-controlled relays or contactors in the electric
cabinets that contain and/or share the same
power supplies as the inverter.
- Connect the signal cable shield to the fixings
provided inside the converter.
- The cable shield must be one continuous piece.
- The shield of the signal cable must only be
connected on the converter side with its ground
terminal. If the signal cable is particularly long
(longer than 20 m) connect the shield at both
ends.
- No signal cables must be arranged parallel to the
power cables and they must maintain a distance
of at least 0.3 m.
- If it is not possible to avoid intersecting the signal
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cables and the power cables, at least make it a
90° angle.
- Arrange the signal and power cables in separate
conduits.
- The earth connections of the signal cables must
be kept separate from those of the power cables;
the connections will then be made to the PE input
cable to the panel
- For complex systems it is preferable to use a
ground rod dedicated solely to power.
- Choose the cable section and insulation suitable
for the power of the converter.
- Make sure that the cable is firmly fixed to the
converter's terminal block: a loose cable could
cause electrical discharges that could in turn
damage the converter.

6.5. Power supply connection

Electrical supply must comply with the description
in section 3.
If the electric control box is connected to an
electric plant with a differential switch (ELCB) or a
Ground Fault Circuit Interrupter (GFCI) as a further
protection, these devices must comply the following
characteristics:
Suitable to control leakage current and, in case of
short pulsed leakage current.
Must operate in case of a fault alternating current,
and in case of fault current with DC content, such
as fault pulse DC current and flat DC current
The electric control box must have installed a
B-type differential switch or GFCI.
These protections must be signed with the
followings symbol.
For the electrical connection of each size , refer to
paragraph 20.2
Recommended differential circuit breaker
I-MAT type
I-MAT 5,2TT-A
I-MAT 11,2TT-B
I-MAT 25,8TT-C
I-MAT 65,4TT-D
I-MAT 119TT-E
(*) Indicate electrical connection protected by
differential with Id trip threshold higher than the
standard for non-industrial use.
6.5.1. Recommended fuses:
The input bridge must be protected against overload
or sudden current surges with rapid or ultra-rapid
fuses sized according to the product's rated output
current (IaN) and technical characteristics.
I-MAT_Ed7 - Operating Instructions
Id (*) (mA)
30
30
100
100
300