27
Eng
RECOMMENDATIONS CONCERNING THE INSTALLATION OF VARIABLE-SPEED
APPLIANCES AND PERSONAL SAFETY
These recommendations apply to machines equip-
ped with an induction motor and a single-phase or
three-phase wobbulator.
NB:
-The electrical circuit and the protective devices
must comply with national regulations.
- The machine must be wired in by a qualified elec-
trician
Protecting your appliance
• Like all electronic devices, wobbulators in clude
components that are sensitive to electrostatic
discharges (ESDs). Before conducting any work
on these wobbulators, technicians must therefore
rid themselves of electrostatic charges.
• The machine must be disconnected from the
mains supply before any internal connection ope-
rations are carried out.
• Repeatedly switching on the appliance will cause
the wobbulator to overload and may result in its
destruction. After the machine has been switched
off, you must wait for 3 minutes before switching
it back on again.
50 or 60 Hz single-phase power supply
• The appliance runs on single-phase or three-
phase current as far as the variator, which turns
the current into variable frequency three-phase
current to supply the motor.
• You must connect the machine to a 200-240 V /
50 or 60 Hz single-phase alternating current
supply with an earthed socket. A higher voltage
will destroy the wobbulator.
• The earthed socket ensures operator safety.
Circuit interrupters ensuring user safety
Ground fault circuit interrupters (GFC s) intended
for variable-speed appliances need to be selected
with great care in order to ensure operator safety.
GFC s may be sensitive to alternating current (type
AC), impulse current (type A) or all currents (type
B).
Danger! Wobbulators feature a bridge-connected
rectifier of the mains supply voltage. For this
reason, in the event of an earth contact, a
continuous fault current may fail to trip a differential
circuit breaker that is only sensitive to alternating
current (type AC).
t is therefore advisable to use a GFC that is
sensitive to impulse current (type A), identified by
the following symbol: or (B) .
Caution: sthese GFCIs may go under different
names, according to the manufacturer.
Appliances with wobbulators produce a fault
current on the earth wire. This current may be suffi-
cient to trip the differential circuit breaker unneces-
sarily. This may occur if :
• Several variable-speed appliances are connected
to the same GFC .
• The appliance produces a fault current that is
above the GFC ’s actual trip threshold.
Caution: As there are manufacturing tolerances,
the actual trip threshold of a GFCI will be between
50% and 100% of its theoretical nominal threshold.
Should a problem arise, measure the fault current
and the GFCI’s actual trip threshold.
You can begin by consulting the characteristics of
your appliance in the table below:
*Connection instructions:
To protect users, it is vital to connect the R 30 V.V.
and R 45 V.V. machines to the mains supply via a
connection unit equipped with the above-mentioned
residual current device. They must not be connected
through a plug and socket.
Appliance Mains supply
Conductor
Cross-section
(mm2)
GFC
(Ph + N or 3 Ph)
Gauge (A) Threshold (mA)
R 30 V.V. 380 - 440V
50 or 60 Hz
Three-phase
4 B 20 A min.
100 mA*
R 45 V.V. 6 B 32 A
