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

6.4. Electrical connection

OFF
The electrical connections must be done by
GB
a qualifi ed 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 X.
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
5 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 fl at 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.
Electrical connection
Page 28 / 136

6.6. Motor connection

Motor cable must be connected directly to the
output terminal board of the frequency converter.
To comply with the EMC standard a
4-pole shielded cable with external shield
protection must be used.
The motor cable must never run parallel to the
power line of the frequency converter
Electrical connection
6.7. 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
pressure between delivery pipe and suction pipe)
Constant temperature mode (the difference of
temperature between delivery pipe and suction
pipe)
Night mode (a primary pressure transducer,
or temperature or fl ow rate, and a secondary
temperature transducer)
Transducer general characteristics Values
Nominal supply voltage
N° of wires
Output signal (current)
Output signal (voltage)
Minimum drivable load resistance
I-MAT_Ed1.indd - Operating Instructions
24 VDC
2 or 3 wires
0/4 ÷ 20mA
0-10V
500 Ohm