Robot Coupe BLIXER 5 V.V. User Manual Download Page 6

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26/10/2020

RECOMMENDATIONS CONCERNING THE INSTALLATION OF VARIABLE-SPEED

APPLIANCES AND PERSONAL SAFETY

These recommendations apply to machines
equipped with an induction motor and a single-
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 include

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
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.

Wiring

• The appliance requires single-phase current as

far as the wobbulator, which turns the latter into
variable-speed three-phase current to supply the
motor.

• You must connect the machine to a 220 - 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), 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).
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

: these 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
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

above 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 :

Appliance