KMEC-1 Set Of Modular Electric Machines Teaching Equipment Electrical Laboratory Equipment
This set of modular machines is proposed as ”first approach” in a Laboratory of Electric Machines; it has been designed to assembly and test a large number of electrical machine (motors and generators) using few base components. TRAINING PROGRAM This set enables to expound the following training program onthe machines of the table included in this leaflet: • Measurement of the resistance of windings and correctionfor temperature • Mechanical assembly of the various machines of the list withthe proper care for alignments and the respect of the air gap • Electrical connections of the machines of the list. In detail,as regards DC machines, the connections with separate,shunt, series, additive compound and subtractive compound excitation will be examined • Influence of the position of brushes on DC motors • For all the motors, when the brake is provided, detectionof electromechanical characteristics: Torque, RPM andefficiency of motors • Detection and measurement of the characteristics of DCgenerators and calculation of the output power • The same for the three-phase alternators, with R-L-C load.Measurement of power factor. The “Prime Mover” unit isrecommended to drive the generators
TECHNICAL SPECIFICATIONS: POWER SUPPLY UNIT WITH DIGITAL INSTRUMENTSMOD. KMEC-PS This unit is universal for all the KMEC machines and it can outputall the necessary AC and DC voltages. Moreover it is providedwith the necessary electric instruments for the measurementsof the parameters of the machines: a multifunction instrumentfor AC (V, I, W, VAr, VA, Frequency, Power Factor, THD% etc..., perphase, and equivalent for the three phases) – 20 A max., and 2instruments for DC (V, I, W) – 20 A max. Output voltages: - 0-48 VAC/10 A - 0-48 VDC/10 A - 24/42 VAC - 16/10 A - 21-0-21 VDC/10 A Protections with TMCB + overall ELCB and fuses on the verylow voltage outputs, Safety terminals of 4 mm; with 3 singlephase universal sockets of 230 V – 10/16 A and a 3ph universalsocket of 3x400 V/N/PE - 16 A Supply voltage: 3 x 400 V-50/60 Hz LOAD / STARTER MOD. KMEC-LS This unit is the variable R-L-C load for the generators. Thisseparate unit enables the step variation of the load. Capacitorsfor single-phase motors are included.It also includes a three-phase rheostat for starting DC motors,the wound-rotor motor and for the start with stator resistance. Resistive load: 7 steps with max. 260 W (possibility of star,delta and AC/DC single-phase connections) Inductive load: 7 steps with max. 260 VA at 50 Hz (possibilityof star, delta and single-phase connections) Capacitive load: 7 steps with max. 260 VA at 50 Hz (possibilityof star, delta and single-phase connections). 22-45-68-90-113-136-160 μF (per phase) can be applied to single-phase motors,with possibility of doubling and tripling these values by theparallel connection of 2 or 3 phases. Starting rheostat: three-phase rheostat 0...30 Ω / 3...1 A perphase. BASE WITH PROTECTIONS MOD. KMEC Over this base, common to all set, it is possible to place upto two machines with the related mechanical protections. Thisbase of anodized aluminium is provided with slides to simplifythe assembly of the components, the coupling betweenthe machines and the application of the protections for thecouplings. Dimensions: 800 x 200 x 320 (h) mm Supply with THEORETICAL – EXPERIMENTAL HANDBOOK