VARMECA
11
3 - CONNECTIONS
• The voltages existing on the power
supply terminal blocks and the
connected cables may cause fatal
electric shocks. The stop function of
the controller does not protect against
these high voltages.
• The controller contains capacitors
which remain charged at a fatal voltage
level even after the power supply has
been cut off.
• After the controller power
supply has been cut off, wait for 2
minutes (so the internal circuits can
discharge the capacitors) before
removing the protective covers.
• The speed controller power
supply must be protected against over-
loads and short-circuits.
It is vital to respect the rating of
protections.
3.1 - Wiring precautions
- When the VARMECA is controlled
remotely, avoid parallel routing of power
cables and control cables.
- All remote control cables should be
shielded and have a cross-section
between 0.22 mm
2
and 1 mm
2
.
- Incorporate a bend where the cables
enter the cable glands so that water cannot
penetrate the terminal box.
- Tighten the cable glands firmly.
3.2 - Terminal blocks
3.2.1 - Layout
• Standard
• With RDCVS option
3.2.2 - Mains terminal block
Note : To open blade terminals, use a flat
screwdriver with a maximum width of 4 mm.
Ref.
Function
L1
L2
L3
Connection of the 3 mains
protected phases, defined in
section 1.3.1
PE
Compulsory connection to
earth
VARMECA
L1
L2
L3
PE
3-phase
mains
supply
1
2
3
1
2
3
4
1
