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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.