Husqvarna DXR140 Operator's Manual page 15

MACHINE´S SAFETY EQUIPMENT
Mechanical protection
Automatic phase rotation relay
The automatic phase rotation relay prevents the electric
motor starting with the wrong rotation direction thus
causing mechanical damage.
Motor protection
To prevent overloading, the motor is equipped with
bimetallic relays in the motor linings that disconnect the
power to the motor if it gets too hot.
If the motor is too hot it is not possible to operate the tools.
The rest of the machine's functions can be run at half
speed in order to facilitate evacuation of the machine from
risky environments.
Once the motor's temperature has fallen to a normal
working temperature all functions can be used again.
The machine's softstarter is fitted with a motor cut-out that
trips if the current is too high for too long a period. The
machine's functions return to normal position after
approximately three minutes.
Fuses
Fuses are used to protect the following components as
well as to prevent fire in conjunction with faults or if
electrical components are overloaded.
Pressure relief valves
The machine's hydraulic system is equipped with
pressure relief valves. They protect the hydraulic system
against too high pressure and the mechanical
components against overloading.
Circulation valve
The circulation valve drains the hydraulic flow into a tank
and relieves the pressure on the hydraulic system. No
pressure enters the cylinders and it prevents the risk of
unforeseen movements. This happens, for example, after
three seconds of inactivity.
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English 15