Download Item Code Technical Specifications Quantity DL EFFICIENCY

Item Code
DL EFFICIENCY-A
Technical Specifications
ENERGY EFFICIENCY IN ELECTRIC MOTORS
Trainer for the study of the energy efficiency in the control of electric motors. The trainer must allow the study of the
energy efficiency in a hydraulic circuit with motor driven pump controlled by an inverter. It must be composed of a
didactic panel on which the components of a hydraulic circuit must be assembled.
The control module shall contain: a multifunction network analyzer (MNA) with an interface module, a variable speed
drive (VSD) and an intelligent control station (PLC).
This unit shall be powered directly by three phase main supply and protected by a differential circuit breaker at the back.
The MNA shall have an interface module useful in order to acquire two parameters (modifiable by the user) and send to
the analogue inputs of the PLC. The VSD and the PLC shall exchange information and interact using the ModBus protocol
through a RS485 communication card installed on the VSD.
The PLC shall have two serial ports: one connected to the VSD (as mentioned earlier) and one shall be used for
programming and available on the front (SERIAL PORT).
Near the serial port connector there shall be also a 12Vdc output that shall be used to power a small pump, supplied with
the trainer, to drain water from the tank when the equipment is left unused for a long time.
The emergency button must interrupt the power in cases of difficult control and, to restore again the power supply, the
differential circuit breaker at the back must be brought to on.
The start and stop buttons shall be normally used to begin and to stop the application and physically connected to digital
inputs of the PLC. For further and/or future applications, there shall be also a female connector of 9 pins, on the back of
the unit, where are connected the signals from the different sensors of the application board.
The application board must consist in a didactic panel on which the components of a hydraulic circuit will be assembled.
The circuit shall simulate, in a schematic way, an aqueduct. From a sump tank the water is flown, by means of a pump,
through an instrumented hydraulic circuit that will end with a set of 3 water intakes of different diameters and controlled
by electrical valves.
More in detail, the controller unit shall have also the following features:
multifunctional instrument
inverter
PLC
Stop-start and emergency push buttons
One serial port
Supply to connect the pump for the tank emptying
More in detail, the application board shall have also the following features:
three solenoid valves
a flow sensor
a pump
a check valve
a gate valve
an expansion vessel
Quantity
two pressure sensors
one delivery valve
Further technical specifications for the two boards:
• 3-phase motor driven pump, 0.37 kW, with cast iron body and brass impeller, max. flow rate 40 l/min;
• three 2-way NC electro-valves, direct control, brass body;
• flow-rate transducer, 1 to 40 l/min;
•pressure transducer, 0 to 10 bar, output signal range 0-10 V;
•pressure transducer, 1 to 12 bar;
•PLC, 12 digital inputs, 4 analogue inputs, 6 relay outputs; inverter, 0.4 kW, PID control mode as standard, 7 userconfigurable preset speeds;
•multifunction network analyzer, line voltages and currents, total active and reactive power, power factors, active and
reactive energies.
This trainer shall be provided with the float switch and sensors as follows.
The sensors used in this trainer are the following
Level magnetic sensor - Float Switch
Flow sensor
Pressure sensor
Pressure transmitter
Level Magnetic sensor - Float switch
The level magnetic sensor, made of non-toxic polypropylene, shall allow the change of the output function by turning the
float or the rod.
Float diameter: 44 mm
Output function: NO (Normally Open)
Operating temperature: -25 -h +100°C
Min. liquid specific gravity: 0.75 kg/dm3
Max. pressure: 6 kg/cm
Protection degree: IP68
Max. switching voltage: 1500 Vac
Max. switching current: 3 A
Max. switching power: 120 VA
Flow sensor
The flow sensor must consist of a propeller that comes into rotation when a fluid flow. The speed of rotation shall be
proportional to flow per unit time. The measure shall be detected by an inductive sensor. The body shall be transparent
for viewing local fluid flow.
Characeristics:
Hermetic separation between the chamber and flow sensor
Good resolution and linearity
Bi-directional operation
Protection degree: IP67
Nominal Pressure (bar): 10
T max. (°C): 100
Q max. (1/min):40
Total measuring range (1/min): 3-40
Linear measuring range (1/min): 1.2-3
Pulses/liter: 128
Max.frequency (Hz):86
Sensor type: Inductive
Power Supply (Vdc) : 10 - 30
Absorption (mA) : 10
Max. load (mA) : 200
Short-circuit protection : Yes
Reverse polarity protection: Yes
Output type: PNP
Pressure sensor
This pressure sensor shall use a membrane as a sensing element. An SPDT (Single Pole, Double Throw) contact will be
activated when the calibration reaches the set value.
An adjustment screw, mounted on the head of the sensor, can set the calibration value within the scope of intervention.
Appropriate mechanical stops shall protect the electrical contact from any overpressure.
It will be used in hydraulic and pneumatic machinery industry, for pumps, CNC machines, etc..
Pressure (bar): 1 - 12
Max. Pressure (bar): 300
Operating temperature (°C): -20/+80
Hysteresis (%): 15
Precision (%):± 4
Fitting: (1/8)" - M
Electrical Contact: 250Vac, 0.5A, SPDT
Protection degree: IP65
To adjust the set point, turn the screw present in the head of pressure switch.
Clockwise = Increase
Counterclockwise = Decrease
This type can be adjusted without removing the connector to access the screw of calibration, just remove the fixing
screw.
Pressure transmitter
It must be suitable for applications where it is necessary to perform measurements of pressure or hydrostatic level of
precision.
The power supply must be between 12 and 30Vdc and the available output signal is 0- 10V. The body must be made of
stainless steel and the sensing element is stainless steel membrane.
Measuring range (bar): 0-10
Max. Pressure (bar): 20
Bursting pressure (bar): 30
Measuring element: piezoresistive stainless steel membrane
Power Supply (Vdc): 12-30
Output signal (V): 0-10
Precision (%):± 0.5
Operating temperature (°C): -40 -H +120
Protection degree: IP65
Solenoid valves
The trainer must have three Sol valves of different discharge dimensions.
They must simulate different users and upon their opening and/or closing, either the pressure and the flow can change; in
these conditions the trainer shall demonstrate, through the software compiled in the i3, what can happen with or without
the intervention of the VSD.
They shall be normally closed and can be activated by coils supplied with 24Vdc, 10W.
Pump
Power: 0.37 kW (0.50 HP)
Pump body: cast iron
Impeller: brass
Flow rate (l/min): 5 ÷ 40
Total manometric head (m): 38 ÷ 5
Max. manometric head (m): 40
Min. manometric head (m): 5
Voltage (3 ) Star (V): 380 ÷ 400
Current (A): 1.15
Power (kW) [HP]: (0.37) [0.50]
Speed (min-1): 2900
Frequency (Hz): 50
Max. Temperature (°C): 60
Protection degree: IP44
Cabling
Supplied with the trainer there shall be two cables, one SUB-D 25P M/F for sensors and actuators and one 10P for the
pump M/F.
The controller shall have on the rear panel a 10 pin bayonet connector (female) and a 25-pin connector (female).
The application board shall have a 10-pin connector (male) and a 25-pin connector (male).
The trainer must be supplied with manual in English language.