Electric Controls

Automation » Electric Controls

In Automation we also need to manage and control the motors in AC and DC and to monitor some industrial plant.

For that reason De Lorenzo has developed trainers to also deepen this field realizing special ones with safety low voltage that allow the final user to learn how to manage different kinds of three-phase AC motors, how to control a DC motor complete with a brake in open and closed-loop and how to protect them using devices of the most used in the industrial field.

These trainers are recommended for high schools.

Products Details


The board allows performing the most important experiments in industrial electrical plants. The components are connected to the board front panel through 2 mm terminals for what concerns the low voltage controls and through 4 mm safety terminals for the connections to the mains. All the components are identified through a clear synoptic diagram showing their type and symbol. The board includes:
• 1 power supply, 24 V
• 1 bipolar switch, 1 - 0 - 2
• 1 thermal relay
• 2 timers
• 5 push-buttons
• 5 signaling lamps
• 5 remotely controlled switches with relevant auxiliary contacts
On the back side of the board there are switches to allow for the introduction of faults by the teacher.
The board is complete with a kit of connecting leads. Power supply: single-phase from mains.
NOTE: It can be connected to a PLC such as the DL 2210A or DL 2210B.
Accessories: the electromechanical component board can be used together with a Dahlander motor, such as DL 2102D, or a squirrel cage motor, such as DL 10115AV.

DL 2104G


The board, allowing the simulation of starting systems for the motors with squirrel cage rotor, is equipped with a clear synoptic diagram that shows through terminals: the push-buttons, the thermal relay contacts, the contactor coils and the signaling lamps. The system, besides the board, includes a three-phase asynchronous motor supplied at the reduced voltage of 42 V, complete with educational base and terminals that make easy the connection to the simulation panel. The speed meter, connected to an opto-encoder, allows measuring the rotation speed of the motor.
Besides, a magneto-thermal switch and an emergency key allow the immediate interruption of the supply circuit in case of overload or shortcircuit.
With this system, the student will be able to study the following:
• Telestarting of three-phase asynchronous motor
• Running teleinversion
• Star-delta telestarting
• Bias teleswitch
• Star-delta telestarting with running teleinversion
• Bias teleswitch for two speed motor of Dahlander connection.
The checking and the automatic management are carried out by means of PLC.
Complete with educational manual.
Power supply: single-phase from mains.
NOTE: It can be connected to a PLC such as the DL 2210A or the DL 2210B

DL 2123


The system has been designed for the study of programmable logic control techniques in the control of the speed of a separately excited dc motor. The speed regulation includes two control loops: hardware current loop with overcurrent limiting and speed loop with external PLC control. Speed measuring with a tacho generator or with an opto-encoder via frequency/voltage converter.
Speed reference set by means of potentiometer or selector switches and under PLC control. The PI controller modulates the PWM circuit that drives the power stage consisting of switching transistor. Possibility of acceleration and deceleration ramps programming. Pointer meters for motor speed, voltage and armature current; connection to PLC through terminals or connectors.
The system is supplied with a machine set consisting of a dc permanent magnet motor, a dc tacho generator, an encoder and a manual shoe brake.
Power: 48 Vdc, 5 A.
Tachometric signal: 180 V at 3000 rpm.
Power supply: single-phase from mains.
Complete with connecting cables, teacher’s manual and student’s work forms.
With this system, the student will be able to study the following:
• Open loop speed control
• Closed loop speed control
• Use of the PLC for the speed measuring
• Acceleration and deceleration ramps programming
• Duty cycle monitoring
NOTE: It can be connected to a PLC such as the DL 2210B.

DL 2125

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