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3--7

Safety and accident prevention

H plant short---circuit protection by means of rapid fuses, earthing of all plant

parts connected with work as well as all foreseeabl e accidental contact; a

thermal---magnetic overload cutout switch shuts down the motor;

H protection from accidental start---up by a minimum voltage relay in case of

power failure.

Emergency d evices

In accordance with Standard CEI 204---1:

H Chapter 5 Section 6 Sub--section 1 ”Emergency stop device”: «the emergency

stop device immediately s tops all the dangerous and other functions of the ma-

chine»;

H chapter 6 Section 2 Sub--section 4 Point 7 ”Protective guards”: «the removal of

protective guards designed to prevent access to dangerous parts or zones causes the

machine to stop immediately; replacing the guards does not restart the functions,

which must be reset».

...Emergency devices applicable to the S20DSP:

1. Emergency stop: a non---return mushroom---head pushbutton, colour red on

yellow background, is located on the control panel of the machine. To release

the pushbutton, the actuator must be rotated 45˚. After the emergency situ-

ation has been resolved, the machine must be reset.

2. Automatic thermal---magnetic cutout switch with thermal---magnetic relay:

The machine’s automatic switch, positioned on the left---hand side of the

base, has two protective systems against the lack of voltage. In fact, if there is

a lack of voltage, it disconnects all electrical devices, blocking the machine

immediately and impedes the automatic restore of the voltage. The other

function is that of re---arming the circuit breaker relay, positioned to protect

from the overloads of current.

3. Pressure transducer for monitoring the blade tension: the machine stops im-

mediately if the blade breaks or the tensioner cylinder pressure drops.

4. Protect ive guard for blade: a coded key microswitch is operated if the blade

cover is accidentally or intentionally opened during the machine operating

cycle, immediately shutting down all functions.

Hyd-Mech S20DSP User Manual

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