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Accessories Set For Demountable Transformer
Description
Comprising 1 welding coil of 5 turns on former with insulated handle and short-circuiting pins,1 annular melting trough with insulated handle to show heating by induction,1 jumping ring which is thrown clear when primary current is started and a floating ring which remains freely suspended when primary current is flowing.
Air Core Solenoid
Description
Air Core Solenoid helps investigate the magnetic field of a long coil. It can also used with the Current Balance as an accessory to measure the force on a conductor in a magnetic field. The solenoid has coils wound on a plastic tube with approximately 575 turns of copper wire. It can carry a current of 5 A continuously or 10 A intermittently.
Basic Electricity Kit
Description
This economical kit consists of various components, which help students explore many electrical and electronic concepts. Supplied with instruction manual. Kit consists of: Cell Holder (12), Bulb Holder, MES, Mounted on Base (20), Push Key (8), Two Way Switch (4), Universal Clip (4), Electrode Holder (4), Variable Resistance (4), Bulbs, MES (40), Connecting Lead, 4mm, 10cm, Red (12), Connecting Lead, 4mm, 10cm, Black (12), Connecting Lead, 4mm, 25cm, Red (4), Connecting Lead, 4mm, 25cm, Black (4), Crocodile Clips (8), Carbon Rod (12), Soft Iron Rod (8), Silicon Diode (4), Resistance, Fixed (4), Copper Foil Sheet, 150×150mm (1), Copper Wire, Bare, 20SWG (1 Reel), Copper Wire, Insulated, 50m (1 Reel), Eureka Wire, 34SWG (50gm), Steel Wool (1 Pack).
Bicycle Dynamo Assembly
Circuit Breaker Demonstration
Description
Investigate the working principle of circuit breaker type fuse with this demonstration model. The apparatus is built on a robust plastic base and includes resistive loads to simulate external wiring circuits. Applications of the thermal response of bimetal strips and also electromagnetism (movement from a solenoid) are clearly demonstrated in this model. When a 12 V DC supply is connected (not supplied) the LED lights to show that current is flowing in the external circuit and the bi-metal strip can be seen to bend as its heater coil raises the temperature. After a few minutes the bending is sufficient to trip the mechanism and the current path is broken. At any current selection a short circuit situation can be initiated by pressing the red button and this produces an immediate response from the solenoid to disconnect the supply.
Coil, High Inductance
Conductors and Insulators
DC Motor Kit
Description
A simple kit for students to gain insight into field poles, armatures and switches, one mounting base, two coils of insulated wire , field pole, mounting bracket, two armature halves, one piece of insulating tubing, motor shaft, two commutator insulators, two bronze wire brushes, two shaft supports, four paper fasteners, a AA battery holder and 6 each of screws and nuts. Requires one AA battery, not supplied, with assembly instructions.
Decade Inductance Box – 3 Dial
Decade Inductance Box – 7 Dial
Description
Housed in a box with seven dials and fitted with 4 mm output plugs, the unit allows a range of inductances from 1ΩH to 10ΩH. 7 Decade Inductance Box (i) 1ΩH to 10ΩH in steps of 1ΩH (ii) 10ΩH to 100ΩH in steps of 10ΩH (iii) 100ΩH to 1mH in steps of 100ΩH (iv) 1mH to 10mH in steps of 1mH (v) 10mH to 100mH in steps of 10mH (vi) 100mH to 1mH in steps of 100mH (vii) 1mH to 10mH in steps of 1mH
Demonstration Dynamo Model
Demonstraton Electric Bell
Demountable Transformer
Description
This heavy duty demountable transformer can be used for the study of transformertheory and many other alternating current phenomena. This kit consists of: 1. A magnetic circuit made of highly permeable U shape metal sheet, which can be closed using two clamps with tightening screws. 2. Section: 40 x 40 mm with 150 mm length and 170 mm height. 3. One coil of 6000 turns with maximum current of 0.2 A. Intermediary coil of 2000 turns output. 4. One coil of 600 turns with maximum current of 2.5 A, which is mainly used to create the primary of transformer. 5. One coil of 1200 turns with maximum current of 1.25 A, fitted with intermediary 400 and 800 turns outputs. 6. One coil of 72 turns with maximum current of 12 A, fitted with intermediary 6, 30, 54 and 66 turns outputs. 7. Power supply cable.
Direction of Current
Dynamo
Earth, Neutral And Live Board Demonstration
Description
This apparatus is an effective demonstration of how the earth wire and fuse act together to protect both the user and the appliance. When the appliance is connected correctly and the LEDs in the appliance will illuminate to show the appliance is working. A fault is then demonstrated by swapping the live wire from inside the appliance to the case to show either the fuse melts (protecting the user and appliance) or in the case of no earth wire, the LEDs illuminate to indicate the passage of current through the person to ground. The fuse is easily visible and can be seen to ‘blow’ when a fault occurs.The unit is supplied with 10 m of fuse wire and full instructions. A 12 V DC power supply is required. Connections are made via 4 mm shrouded sockets.
Electric Motor Model
Electric Motor St. Louis
Description
The motor consists of a two pole armature mounted between the ends of two bar magnets. The armature has a two section commutator and a pair of slip-rings on its shaft and is so constructed that the wire cannot slip off the iron core. The upper bearing and brushes for the commutator are mounted on a strong upright. Separate brushes are provided for the commutator and for slip rings and each are connected to a terminal. The magnets are held in position by thumb screws.
Electric Motor, Demonstration
Fix Resistance
