Robot Coupe Blixer 8 User Manual page 6

RECOMMENDATIONS CONCERNING THE INSTALLATION OF VARIABLE-SPEED
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 electrician
Protecting your appliance
• Like all electronic devices, wobbulators in clude
components that are sensitive to electrostatic dis-
charges (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 operations
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.
APPLIANCES AND PERSONAL SAFETY
• 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 (GFCIs) intended for
variable-speed appliances need to be selected with
great care in order to ensure operator safety. GFCIs
may be sensitive to alternating current (type AC), im-
pulse 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).
As the appliance has a single-phase supply, it is
therefore advisable to use a GFCI that is sensitive to
impulse current (type A), identified by the following
symbol: .
Caution: sthese GFCIs may go under different na-
mes, according to the manufacturer.
Appliances with wobbulators produce a fault current
on the earth wire. This current may be sufficient to
trip the differential circuit breaker unnecessarily. This
may occur if :
• Several variable-speed appliances are connected
to the same GFCI.
• The appliance produces a fault current that is abo-
ve the GFCI'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:
Conductor
Appliance Mains supply Cross-section
(mm )
2
Blixer 8 V.V. 200 - 240V
®
50 or 60 Hz 6
Blixer 10 V.V. Single-phase
®
Blixer 15 V.V. 380 - 440V
®
50 or 60 Hz 2.5
Blixer 20 V.V. Three-phase
®
Conductor
Appliance Mains supply Cross-section
(mm 2 )
Blixer 8 V.V.
®
2.5
200 - 240V
Blixer 10 V.V.
®
50 or 60 Hz
Blixer ® 15 V.V.
Three-phase
6
Blixer 20 V.V.
®
GFCI (Ph + N or 3 Ph)
Gauge (A) Threshold (mA)
25
30 mA
20
GFCI (Ph + N or 3 Ph)
Gauge (A) Threshold (mA)
20
30 mA
25
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25/07/2017