Electrical Connection; Power Supply Connection; Motor Connection - Calpeda I-MAT Serie Instrucciones De Uso

6.4. Electrical connection

OFF
The electrical connections must be done by
EN
a qualified electrician, in accordance with
the local standards
Follow the safety standards
Execute the ground connection
Follow the indications reported in this
manual
Be careful during electrical connection that
no piece of wire, sheath or foreign objects
fall into the frequency converter.
The supply terminal board, and the motor
terminal board accommodate cables with
maximum section as reported in TABLE
1 paragraph 20.2. In this case wiring tips
should be used.
Wrong connections could tamper the
electronic circuit of the frequency converter.
Before any kind of electrical operation on
the frequency converter, just installed wait
10 minutes.

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
Page 28 / 144
(*) Indicate electrical connection protected by
differential with Id trip threshold higher than the
standard for non-industrial use.
6.6. IT power grid supply configuration
IT power grid supply, is also known as "isolated
ground supply" because the star point of the power
supply is not related to ground. This kind of power
grid supply is to use an insulation controller that
constantly monitors the galvanic isolation between
ground and the various power devices.
The converter is able to work also with this typology
of power grid supply.
If the frequency inverter is to be used in an IT
mains, the relevant IT mains jumpers (identified in
the pictures at paragraph 20.2 called J...).
- Never remove the centre housing part from the
heat sink.
- Mind the capacitor discharge time.
After switching off the frequency inverter, wait 10
minutes until dangerous voltages have discharged.

6.7. Motor connection

Motor cable must be connected directly to the
output terminal board of the frequency converter.
The motor cable must never run parallel to the
power line of the frequency converter
For the electrical connection of each size , refer to
paragraph 20.2.
6.8. Transducers connection.
A transducer is an analog instrument with an output
signal of 4-20 mA (or different) that continuously
reads a parameter of the system.
For some operating modes it is possible to connect
up to 2 transducers:
Constant pressure mode (the difference of pressure
between delivery pipe and suction pipe)
Proportional pressure mode (the difference of
Id (*) (mA)
pressure between delivery pipe and suction pipe)
Constant temperature mode (the difference of
30
temperature between delivery pipe and suction
30
pipe)
Night mode (a primary pressure transducer,
100
or temperature or flow rate, and a secondary
temperature transducer)
100
300
Contact with live components
Risk of fatal injury due to electric shock!
To comply with the EMC standard a
4-pole shielded cable with external shield
protection must be used.
WARNING! Standard transducer cannot be
used in sea water applications.
I-MAT_Ed5 - Operating Instructions