Robot Coupe R 402, User Manual

Eng

19

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 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), 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 :

*  Except for specific three-phase 200-240 V models sold 

in Japan.

Appliance

Mains supply

Conductor 

Cross-section 

(mm

2

)

GFCI (Ph + N)

Gauge (A)

Threshold 

(mA)

r 402 V.V.

200 - 240V 

50 or 60 Hz 

single-phase

1.5

B 16

≥

 30