BMT Bench For Testing Motors And Transformers Educational Equipment Electrical Workbench
This bench is absolutely necessary for the testing and quality control of the machines assembled by students. The components of these bench are perfectly equal to those used in industry to test motors and transformers. TECHNICAL SPECIFICATIONS: This bench is made of press-formed sheet steel on a framework of steel sections, epoxy painted. The working top is of chipboard coated with bonded laminate. Two drawers with flush-mounted handles and key locks are fixed under the working top. All the electric components and accessories are included in the desk where they are also represented graphically on the silk-screen-printed fore panel of aluminium alloy. ELECTRIC CHARACTERISTICS: The bench is provided with the following lines: • general services, with main control device of electro-magnetic type, protected by high-sensitivity magneto-thermal differential circuit breaker, with key switch, stop/emergency pushbutton, warning light • service line with three single-phase sockets and a three-phase socket; protection against overload and short-circuit by magneto-thermal circuit breaker • variable single-phase line of 0-270 Vac – 8 A, switchable to DC 0-220 Vdc – 8 A, with control device of electro-magnetic type, coarse and accurate voltage regulation, digital measurement instrument of main electric parameters (voltages, currents, active, reactive and apparent power, power factor, frequency) of AC line, digital voltmeter and ammeter for DC line, magnetothermal protection against overloads and short-circuits, safety terminals • variable three-phase line of 0-450 Vac – 8 A, switchable to DC 0-500 Vdc – 8 A, with control device of electro-magnetic type, digital measurement instrument of main three-phase electric parameters in 3 systems (voltages, currents, active, reactive and apparent power, power factor, frequency) of AC line, digital voltmeter and ammeter for DC line, magneto-thermal protection against overloads and short-circuits, safety terminals • digital multimeter for measurements of direct voltage and current, alternating voltage and current, resistance and temperature, provided with measurement probe and prods • line of dielectric strength test - as regards the applied voltage test of motors,transformers, components and generally of anyelectromechanical construction assembled by students,it is possible to carry out destructive and nondestructive tests - high voltage signalled by blinking lamp - optical-acoustic signalling of discharge - start key switch and pushbutton - emergency button for immediate suppression of high voltage - insulation of prods at 20 kV - control and testing circuits assembled with solid state components Line of electronic revolution counter It consists of a digital frequency meter coupled to an opticalreflection sensor. This system enables to measure the rotationspeed of the motors under test on the brake, directly in r.p.m.,within the limits of 0-999 r.p.m. The sensor is equipped withadjustable support for an easy positioning. Line of the regulated power supply unit of 12 Vdc 15 A - electronic protection of output against short-circuit and overload with automatic reset - foldback current limitation - serial regulation - stability for variations of line voltage of ± 10% and of the load from 0 to maximum: 0.05% - residual ripple: 10 mVpp Line of welding machine Arc-welding machine with prods for welding the ends of coilsof motors and transformers assembled by students, withoutremoval of the insulating layer of wire nor the use of tin. Dimensions: 2.000 x 1.000 x 860 + 450 mm of desk Net weight: 250 kg Supply with THEORETICAL – EXPERIMENTAL HANDBOOK
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