CHAPTER 4: ELECTRICS 4-7
ALPHA 552
2.2. Description of the elements in the cabinet
2.2.1. Main disconnect switch QS1
In accordance with the requirements of the international IEC standards, when the main disconnect switch
is at 0off, it interrupts the input of the three phases in the control cabinet of the barfeed system.
Make sure it is turned OFF before opening the electrical cabinet.
2.2.2. Main circuit breaker QM1
Circuit breaker QM1 interrupts the 3 phases, which power
the hydraulic motor.
If the motor requires excessive power, the circuit breaker
activates and push-button (C) STOP is released.
For safety reason, the power supply to the motor is
immediately interrupted. After having located and
repaired the problem causing this interruption, reset the
circuit breaker by pressing the push-button (C).
At the factory, the breaking current is set to 2.5 amperes.
Designation Description
A Power in connecting terminal
B Breaking current setup
C Release button
D Power out connecting terminal
E Test button
Power ON
Power OFF
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