16
Electrical connection Variomat 2 TT
The power supply line of the motor must never run
parallel to the power line of the electrical panel.
7.2. Electrical connection of inputs
and auxiliary contacts
To make the electrical connection of the inputs
and the auxiliary contacts disconnect power
supply from the frequency converter, remove the
screws and the small cover on the back of the
frequency converter. Insert the electrical cable into
the nut and in the gasket and pass the cable into
the small cover. Extract the connector and connect
the cables. Insert the connector in the electrical
board, reinstall the small cover, tighten the screws,
insert the gasket and tighten the nuts.
In order to guarantee the IP protection class it
could be necessary to use the optional gaskets
supplied.
7.2.1. Connection of the remote
on/off signal
Connect to the connections B1 and B2 the
possible switch for the remote start of the
frequency converter.
Electrical connection
Electrical connection
7.2.2 Float switch connection
In case of normally open configuration (minimum
level float switch), connect the float switch in the
connections B3 and B4
Electrical connection
7.2.3 Remote alarm connection
To connect remote alarm connect to the
connections C1 and C2 the possible remote alarm
or the control panel for remote alarm RA100.
The remote alarm can be used to signal error on
the frequency converter.
Electrical connection
8. Dry-running protection
The frequency converter is equipped with a dry
running protection for the pumps. The frequency
converter automatically execute 6 double attempts
to restart the pump each lasting approximately 5
seconds to allow the reload of the pump and of
the system. The sequence of automatic rearming
attempts start after 5 seconds continues after 1
minute, 1 hour, 6 hours, 12 hours and 24 hours
since the frequency converter stopped the pump.
After the last failed attempt the frequency
A
1
2
3
1
2
1
2
3
4
5
6
7
B
C
A
1
2
3
1
2
1
2
3
4
5
6
7
B
C
+
RA 100
-
A
1
2
3
1
2
1
2
3
4
5
6
7
B
C
istr_P560_2 VARIOmat_01_19_istr_P444 19/12/18 09:00 Pagina 16
