3.4 ELECTRIC CONNECTIONS
DANGER
Skilled operators must
install
electric
al
connections.
DANGER
Before connecti
o
n,
refer to
the electric
s
diagram and the plate on the machine for
information about the voltage
and
frequency etc.
DANGER
Connect the
earth
terminal PE (yellow-green) before making any other connections.
DANGER
Apply a knife switch at the top of the connecting cable of the machine to the power system.
The knife switch must be combined with a
n overload
safety device
with a
differential switch (safety switch).
The technical features of the safety device must be in accordance with the standards in
force in the country where the machine
is
installed.
ELECTRIC TOLERANCES:
•
Real voltage
±
10 % of the nominal one
•
Frequency:
±
1 % of the nominal one in a continuous way
±
2 % of the nominal one for a short
period
•
The harmonic distortion of the sum from the second to the fifth harmonics not more than 10 % of the total
voltage as a real value between the conductors. A further distortion of 2% is accepted for the sum from
the sixth to the thirtieth harmonics of the real total value between the conductors.
•
With reference to the tension unbalance of the three-phase voltage, the inverted sequence component
and the zero sequence component must not be more than 2% of the direct sequence component of the
voltage
•
The voltage pulses must not last more than 1,5 ms with an up/down time between 500 ms and 500
µ
s
and a peak value not higher than 200 % of the real value of the nominal tension.
•
The electric
al
feed must not be interrupted or zeroed for more than 3 ms. Between two interruptions it
must not take more than 1 s.
•
The interruptions must not overcome 20 % of the tension peak for more than one cycle. Between two
interruptions it must not take more than 1 s
.
Chapter 4
FEATURES OF THE APPLIANCE
4.1 DIMENSIONS AND MASS
LENGTH
264 mm
WIDTH
403 mm
HEIGHT
196 mm
MASS
5 kg
7
