The power circuit is protected by a thermal magnetic breaker and the control circuit is protected by diodes. Connections can be made between the three-phase power supply and other components in the circuit through 4mm standard color-coded safety sockets using banana plug jumper leads. The SCR Direct Current Motor Speed Controller allows students to study the operation of a silicon-controlled rectifier used in motor speed control experiments. Specifications and/or diagrams are silk-screened on the back of a clear-plastic front panel for ease of identification. Included in the Rotating Machines Trainer (50016) for 1/3 hp - 250 W. Requires a 120V 60Hz circuit. The trainer is protected by a either a diode or thermal-magnetic circuit breaker.
Educational Advantages:
Switch and start indicator light
Current limit adjustment for torque control at full load
Bridge assembly with built-in freewheeling diode
Speed control adjustment
Plug-in horsepower resistor
Design with superior line and load voltage regulation
Minimum/maximum speed adjustment
Transient voltage protection and AC fuse protection
Acceleration trim pot adjustment
Included in the basic Rotating Machines Trainer (50016) for 1/3 hp - 250 W.
Theoretical topics:
Thyristor circuit fundamentals
Thyristor component familiarization
SCR half wave rectifier
The four triggering modes
Half wave and full Âwave phase control
SCR control of a half wave rectifier
Test a Silicon Controlled Rectifier
SCR control of a full wave rectifier
UJT characteristics
UJT half wave and full wave phase control
Bidirectional conduction
SCR DC operation
Gate trigger voltage and holding current.
The Scraped Surface Heat Exchanger Series utilises the monocoque stainless steel cabinet with membrane technology control panel. The working platform can accommodate one, or two barrels (B) or a variable speed pinworker (P) alongside a product reservoir and progressive cavity feed pump.
An air incorporation system can also be added if required.
Small batch sizes enable rapid product testing and a Clean-In-Place (CIP) facility speeds turnround for increased productivity. All services required are housed inside the wash-down cabinet, which also contains a drawer mounted with the electrical chassis.
Maintenance an cooling access maintenance and cooling accessenlarge
The unit uses a refrigeration system supplied within the cabinet and utilises a chilled, recirculating brine system, which is pumped through the barrel jackets.
Features:
Integral membrane control panel enabling simple control and monitoring of all major variables
Enclosed self-contained, mobile, stainless steel service cabinet for easy cleaning and wash down
Full control of barrel speeds up to 1000rpm
Temperature control system incorporated
Hygienic design
Made from stainless steel
Hard chromed barrels
In cabinet refrigeration.
Four kinds of punches as one set, which consists of perforated pipe, a poke and so on. The outside diameter of punch is φ6mm?φ8mm?φ10mm respectively and the aperture is φ4mm?φ6mm?φ8mm respectively.
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The instrument shelter cover is horizontal two wood inlaid together, above the front behind the 10mm, in order to protect the equipment from damage.
The size of the instrument shelter is about 460mm * 290mm * 537mm (height, width and depth).
The height of the frame is 1500mm, the width of the material is 35mm, the thickness of 3mm is high quality carbon structural steel, and the surface is rustproof.
MG Screw compressor with charge-air cooling
Easily visible:
Two screw spindles, driven via a magnetic clutch and gear wheels.
At the bottom of the charger, is the cutaway charge-aircooler with water channels.
The charger runs at 12,000 RPM.
The main element of the unit is a slotted, elastically deformable steel block. The resulting deformation is recorded by a mechanical dial gauge, and is directly related to the bolt tension force generated. By tightening the bolt joint, the slotted area is deformed, thereby generating an axial tension force in the bolt.
Features:
Breakaway torque of a bolt joint
Correlation between tightening torque and tension force on standardised bolts.
Learning Objectives And Experiments:
Measurement Of The Breakaway Torque, Including For Different Fitting Situations Of The Bolt Joint
Axial tension force in a bolt joint dependent on the tightening torque or the elastic deformation of a slotted block
Measurement of thread friction and overall friction.
Range: M5-M20 M16-M42
Point Angle: 5 -30 deg. 5 -30 deg.
Power: 220V 180W 220V 250W
Motor: 4800rpm 4800rpm
Grinding wheel: CBN(HSS)orSD
Dimension: 36x27x30.5cm 40x30x31cm
Weight: 16kg 27kg
The resulting deformation is recorded by a mechanical dial gauge, and is directly related to the bolt tension force generated. The bolt joint is tightened and slackened using a special torque wrench, which can be set sensitively with the aid of a threaded spindle. The main element of the unit is a slotted, elastically deformable steel block. By tightening the bolt joint, the slotted area is deformed, thereby generating an axial tension force in the bolt. By using an axial bearing, the head friction of the bolt can be largely excluded, so that only the friction of the threaded joint is measured.
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Screw-locking devices are presented in the as-fitted position on an aluminium panel. A transparent multi-compartment storage tray holds large numbers of screw-locking devices. This instructional kit is used for demonstration and information purposes. The well-structured instructional material enhances the informational value of the kit. No provision is made for conducting exercises or experiments. The kit is clearly laid out on a plastic tray.
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Soft and comfortable multilayer SMS material delivers high filtration efficiency while maintaining a low particle count.
Fluid repellent material that delivers high bacterial filtration rates with low particle counts reducing your contamination concerns
Pants have a spandex waist, one rear pocket and are reinforced along the inner thigh area and safety stitched seams.
Product Type: Cut-resistant Sleeve
Length (English): 22 in.
Length (Metric): 55.88 cm.
Includes: Thumb hole and elastic around top.
It provides extra experiments andstudies into power generation. The motor and generator set consists of two coupled machines mounted in the base of the control console. A self-contained motor and generator set that operates as asecond generator for Power System Trainer. The relays show students how actual generatorsare protected and the different ways that they are protected. Students can setthe relays from their control panels. Manual or differenttypes of automatic excitation control the output of the generator. A vector drive controls the speed of the motor. Digital meters show the conditions ofthe prime mover and generator. The circuit breakers also include hand-operated switches,and lamps. The lamps show whether the circuit-breaker is open or closed. The relays also include sockets to linkthem to a suitable computer for moredetailed programming, if needed. The relays operate the circuit breakers aroundthe second generator.
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Second Grade Natural Experiment Box
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It allows analyzing the behaviour of an element with proportional transfer function able to oscillate, with a delay of the second order, both in the time domain and in the frequency domain.
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Evaporator selectable via solenoid valves
Adjustable electric heater in the refrigeration chambers as cooling load
Pressure measurement at all relevant points in the system
2 refrigeration chambers: refrigeration and freezing stage
Water-cooled coaxial condenser.
Secondary Loss Of Load equipment is suitable for the study of losses and it includes straight sections of piping for the study of primary loss that could occur in the system. All pressure connections have double sealed quick couplings; the system includes also a differential water manometer and a digital differential pressure gauge for measuring the resulting pressure. The equipment includes also other elements such as elbows of different diameters 90 and 45, tees, widening, narrowing, various types of valves (as ball, gate, membrane, backstop) with pressure taps upstream and downstream arranged in order to determine loss load produced with different flow rates.
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Through the use of these trainers, students may be exposed to the function of the stabilizer, shock absorbers, steering linkages, suspension systems, areas of alignment and adjustment, operation of brakes and more. These are complete front end units of vehicle that are ideal for demonstrating the operation and interaction of steering and suspension mechanisms.
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Each unit consists of one complete brake which has been carefully sectioned in order to expose all key internal parts and is mounted on a wooden base plate. The major types of hydraulic brakes are available as sectioned models, which are very useful in the classroom for demonstrating the different types of brake construction and operation.
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