Electron
S.R.L.
Design Production & Trading of Educational Equipment
SOFTWARE FOR ELECTRICAL MACHINES
ELECTRON S.R.L. VIA CASCINA TORCHIO I-26833 MERLINO (LO) ITALY - TEL. 39(Italy) 02(Milan) 9065 9200 FAX 9065 9180 - E-mail: electron@electron.it Web: www.electron.it Rev 11/00 Specifications may change without notice
page - 1 -
File LEAFLET A4780
A4780 - COMPUTER BASED MEASUREMENT TRAINER Use of PC is recommended for automatic measurements in Electrical machines test benches. The proposed hardware and software allows to operate with the highest flexibility with any type of electrical machine, irrespective of the nominal power. The following 3 possibilities of use are provided: Manual measurement: by introducing data from the keyboard in order to easily plot the characteristics. SemiSemi-automatic measurement: with data acquisition every time it is requested, by means of instruments with RS232 interface Automatic measurement: the test can be carried out completely under supervision of the PC. HARDWARE: SET OF MEASURING INSTRUMENTS A47.80: Set of digital instruments with 3 1/2 digits displays, accuracy of 0.5% with serial interface RS 232 suitable for the simultaneous connection of several instruments to the only one RS 232 computer interface. Each set includes : Digital voltmeters (2 units) with 5 ranges from 200mV to 750V Digital ammeters ammeters (3 units) with 5 ranges from 2 mA to 10 A Digital threethree-phase watt meters (2 units) 3 systems, suitable for single-phase and three-phase circuits) 5A - 400V. Digital torque and speed measuring module like our models A47.20+A47.30+A4721+A47.31 GENERAL INTERFACE MODULE A47.81 Alternatively to the above system a special interface module can be proposed. The unit is complete with all required inputs, with A/D card and serial interface with RS232.
SOFTWARE: collaboration All software is prepared in collaboration with SAMAR, the leading Italian manufacturer of Electrical measuring instruments. Demos are available on request. 1. SOFTWARE FOR EXERCISES ON SINGLE PHASE TRANSFORMERS Model A47.80 SW1 Typical experiments performed are: Measurement of winding resistance by V-I method. Transformation ratio with direct reading of voltage. No-load test with determining of Po, lo, cosfi. Short circuit test with determining of Pcc, Vcc, Cosfi. Efficiency and voltage drop at different loads. 2. SOFTWARE FOR EXERCISES ON THREE PHASE TRANSFORMERS Model A47.80 SW2 Same experiments already proposed for the single phase transformers. 3. SOFTWARE FOR EXERCISES ON AC MACHINES Model A47.80 SW3 Typical experiments performed are: ThreeThree-phase asyncronous motors Measurement of stator and rotor resistance by V-I method. Measurement of the transformation ratio. No-load test with determination of Po, lo, Cosfi Short circuit test with determination of Icc, Cosfi Circular diagram and conventional efficiency. Direct test with determination of electrical and mechanical characteristics and visualisation by tables and diagrams. Control of motor speed by the use of an inverter Alternators Typical experiments performed are: Winding resistance by V-I method.
ELECTRON S.R.L. VIA CASCINA TORCHIO I-26833 MERLINO (LO) ITALY - TEL. 39(Italy) 02(Milan) 9065 9200 FAX 9065 9180 - E-mail: electron@electron.it Web: www.electron.it Rev 11/00 Specifications may change without notice
page - 2 -
File LEAFLET A4780
No-load or magnetic characteristics. Short circuit characteristics and syncronous impedance. Additional losses. External characteristics by Behn-Eshemburg method. Regulation characteristics by BehnEshemburg method and efficiency calculation.. SingleSingle-phase motors Typical experiments performed are: Direct test with determinationof electrical
and mechanical characteristics and visualisation by tables and diagrams. 4. SOFTWARE FOR EXERCISES ON DC MACHINES Model A47.80 SW4 Typical experiments performed are: Measurement of winding resistance by V-I method. Excitation characteristics. External characteristics. Regulation characteristics. Mechanical and iron loss. Couple - speed characteristic and efficiency.
ELECTRON S.R.L. VIA CASCINA TORCHIO I-26833 MERLINO (LO) ITALY - TEL. 39(Italy) 02(Milan) 9065 9200 FAX 9065 9180 - E-mail: electron@electron.it Web: www.electron.it Rev 11/00 Specifications may change without notice
page - 3 -
File LEAFLET A4780
A4781 - COMPUTER BASED DATA ACQUISITION SYSTEM FOR ELECTRICAL MACHINES The Data Acquisition System consists of a Windows based data acquisition and processing software and a Data Acquisition Unit. The Data Acquisition Unit interfaces a PC through an RS232 port and the electrical machines under test by means of 4 mm test cables. Moreover it can be connected to an RPM sensor and a Torque sensor mounted on a Test Bench. It consists of 3 Ammeters, 1 Voltmeter and 1 three phase Wattmeter. The Windows based software makes use the latest presentation techniques and guides the user through the exercises by means of clear menus and instructions, on-line help, input data validation as far as ranges and consistency are concerned. Reproductions of instruments faces are shown on the computer monitor and their readings are updated in real time.
Data is processed to compute detailed parameters as well as overall performance information: they are made available on tables and graphs for detailed analysis and for printing. The parameters and appearance characteristics such as colors and lines can be selected by the user. By manually inserting test data through the keyboard instead of acquiring them from the computer, it is possible to simulate and demonstrate tests and exercises without actually having to connect any equipment. It covers the following study areas: Single and Three Phase Transformers, Single and Three Phase Asynchronous Motors, DC Machines and Synchronous Machines. Installation, use and experiments are described in the manual supplied with the System.
ELECTRON S.R.L. VIA CASCINA TORCHIO I-26833 MERLINO (LO) ITALY - TEL. 39(Italy) 02(Milan) 9065 9200 FAX 9065 9180 - E-mail: electron@electron.it Web: www.electron.it Rev 11/00 Specifications may change without notice
page - 4 -
File LEAFLET A4780
SOFTWARE COMPONENTS COMPONENTS SOFTWARE FOR EXPERIENCES ON SINGLE PHASE TRANSFORMERS Model A4781 SW1 Measurement of winding resistance by V-I method. Transformation ratio with direct reading of voltage. No-load test with determining of Po, lo, cosfi. Short circuit test with determining of Pcc, Vcc, Cosfi. Efficiency and voltage drop at different loads. SOFTWARE FOR EXPERIENCES ON THREE PHASE TRANSFORMERS Model A4781 SW2 Same experiments described for the single phase transformers. SOFTWARE FOR EXPERIENCES ON AC MACHINES Model A4781 A4781 SW3 Three phase motors: Measurement of stator and rotor resistance by V-I method. Measurement of the transformation ratio. No-load test with determination of Po, lo, Cosfi Short circuit test with determination of Icc, Cosfi
Circular diagram and conventional efficiency. Direct test with determination of electrical and mechanical characteristics and visualisation by tables and diagrams. Single phase Motors: Direct test with determination of electrical and mechanical characteristics and visualisation by tables and diagrams. Synchronous Machines: Winding resistance by V-I method. No-load or magnetic characteristics. Short circuit characteristics and synchronous impedance. Additional losses. External characteristics. Regulation characteristics and efficiency calculation. SOFTWARE FOR EXPERIENCES ON DC MACHINES Model A4781 SW4 Measurement of winding resistance by V-I method. Excitation characteristics. External characteristics. Regulation characteristics. Mechanical and iron loss. Torque-speed characteristic and efficiency.
ELECTRON S.R.L. VIA CASCINA TORCHIO I-26833 MERLINO (LO) ITALY - TEL. 39(Italy) 02(Milan) 9065 9200 FAX 9065 9180 - E-mail: electron@electron.it Web: www.electron.it Rev 11/00 Specifications may change without notice
page - 5 -
File LEAFLET A4780
A4782 - COMPUTER BASED DATA ACQUISITION SYSTEM FOR ELECTRICAL MACHINES
The Data Acquisition System consists of a Data Acquisition Unit Model ETC-N and a Windows based data acquisition and processing Software. The Data Acquisition Unit interfaces a PC through an RS232 port and the electrical machines under test by means of 4 mm test cables. Moreover, it can be connected to an RPM sensor and a Torque sensor mounted on a Test Bench. The Data Acquisition Unit consists of: –
2 multi-meters with RS232 interface, a 4000 points LCD and bar-graph display, on which readings of AC and DC voltages, currents, temperature and frequency can be manually scrolled; they are particularly useful in performing the general electricity measures.
–
1 power analyser with graphic display to measure power related parameters such as V, I, W, VAR, cos , Hz, KWh, KVARh, averages, and distortion measures up to the 50th harmonic. They can also be scrolled manually.
–
1 Multi-serial Card to be installed in the PC (the PC can be supplied optionally).
Note: The Unit provides the additional capability of performing: – – –
harmonic distortion analysis energy measurements electrical power network analysis
The Windows based Software consists of 6 Modules as described below. It makes use the latest presentation techniques and guides the user through the exercises by means of clear menus and instructions, online helps, input data validation as far as ranges and consistency are concerned. Reproductions of instrument faces are shown on the computer monitor and their readings are updated in real time. Data is processed to compute detailed parameters as well as overall performance information: they are made available on tables and graphs for detailed analysis and for printing. The parameters and appearance characteristics such as colours and lines can be selected by the user. By manually inserting test data through the PC keyboard, instead of acquiring them from the computer, it is possible to simulate and demonstrate tests and exercises without actually having to connect any equipment.
ELECTRON S.R.L. VIA CASCINA TORCHIO I-26833 MERLINO (LO) ITALY - TEL. 39(Italy) 02(Milan) 9065 9200 FAX 9065 9180 - E-mail: electron@electron.it Web: www.electron.it Rev 11/00 Specifications may change without notice
page - 6 -
File LEAFLET A4780
The following Software Modules are supplied with the Data Acquisition Unit:
The 6th module, General Electricity Software Module, is supplied optionally.
– – –
Installation, use and experiments are described in a manual supplied with the System.
– –
Single Phase Transformers Three Phase Transformers Single and Three Phase Asynchronous Motors Synchronous Machines (optional) DC Machines
ELECTRON S.R.L. VIA CASCINA TORCHIO I-26833 MERLINO (LO) ITALY - TEL. 39(Italy) 02(Milan) 9065 9200 FAX 9065 9180 - E-mail: electron@electron.it Web: www.electron.it Rev 11/00 Specifications may change without notice
page - 7 -
File LEAFLET A4780