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Electricity
Circuit Breaker Demonstration
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 12VDC 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.PH50136C -
Electricity
Earth, Neutral and Live Board Demonstration
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 meters of fuse wire and full instructions. A 12V D.C. power supply is required. Connections are made via 4mm shrouded sockets.PH50136E -
Electricity
Worcester Circuit Board
A practical classroom circuit board designed for teaching basic electricity through hands-on experiments. The Worcester Circuit Board uses a sturdy wooden base with spring terminals, making it quick to build, alter, and test circuits without soldering.
Supplied with a range of components including lamps, switches, batteries, connecting leads, a potentiometer, resistor, diode, electrodes, copper foil, and steel wool, the kit supports a wide variety of electrical investigations. Students can explore topics such as series and parallel circuits, conductivity, resistance, and current flow using simple, repeatable setups.Key Features
- Spring-terminal circuit board for fast circuit assembly
- No soldering required
- Includes essential components for electrical experiments
- Durable construction for classroom use
- Easy to reconfigure for different investigations
- Supplied with Instructions Manual.
PH50152R -
Electricity
Westminister Electromagnetic Kit
A very effective and motivating learning aid in elementary electromagnetism. Consists of 8 anisotropic alloy magnets, 8 ceramic ferrite magnets, 4 steel magnet yokes, 6 plotting compasses, 4 hardboard formers to take compasses, 1 bottle iron filings 250 gm, 4 dispensers for iron filings, 4 double C-cores, 4 clips for C cores, 4 Aluminium rings, 4 Aluminium split rings, 4 armatures with axle tubes, 4 Aluminium axle rods, 8 split pins, 16 rivets, 4 formers for coils, 4 reels cello tape, 4 reels copper wire, 4 sheets white pasteboard, 4 plain postcards, 4 reels white cotton thread, 1 length latex rubber tubing, 4 each resistors 100 ohms and 10 ohms, 4 support bases, 10 M.E.S bulbs, 8 MES bulb holders,1 wood clamp and 1 wooden block. With instructions.
PH50160 -
Electricity
Power Supply, 2V
For Westminster Electromagnetic Kit giving 1 V full wave rectified D.C. and 1 and 2V.A.C. outputs at 8A max. The circuit diagram is printed on the top panel which also carries mains switch, light indicator and output sockets for D.C. and A.C. With 1.5-meter mains detachable cable.
PH50163 -
Electricity
Demountable Transformer
This heavy duty demountable transformer can be used for the study of transformer theory and many other alternating current phenomena. This kit consists of:
- A magnetic circuit made of highly permeable U shape metal sheet, which can be closed using two clamps with tightening screws.
- Section: 40 x 40 mm with 150 mm length and 170 mm height.
- One coil of 6000 turns with maximum current of 0.2 ampere. Intermediary coil of 2000 turns output.
- One coil of 600 turns with maximum current of 2.5 ampere, which is mainly used to create the primary of transformer.
- One coil of 1200 turns, with maximum current of 1.25 ampere, fitted with intermediary 400 and 800 turns’ outputs.
- One coil of 72 turns, with maximum current of 12 ampere, fitted with intermediary 6, 30, 54 and 66 turns’ outputs.
- Power supply cable.
PH50170 -
Electricity
Demonstration Transformer Set, Advanced
The classic demonstration transformer apparatus is added with some additional safety features. Rather than the traditional mains (220-230V AC) coil we have designed a dedicated Demonstration Transformer Power Supply with fixed (25V AC) voltage and high current output to which 100-turn or 150-turn mains coil substitutes connect. The advantage is that no lethal mains voltage is involved, instead the voltages to these mains coil replacements is 25V AC and so safe. Additional AC and DC outputs are provided up to 4V for other experiments.
Includes:
- U and I Core Set
- 100 and 150 Turns Mains Coil Substitute for use with power supply ((PH50172AC/3)
- 300, 600, 600-0-600, 900, 1800 turns coils.
PH50172A -
Electricity
Demonstration Transformer Induction Accessory Kit
Includes:
- Copper Coil – With screw clamps to hold a nail for the nail melting demonstration.
- Nails – Steel flat-headed nails 65 x 3 mm or 2½ x 1/8 inch, some with a central groove making the nail thinner at that point.
- Solid and Split Aluminium Rings-Two solid and one split for the ring-launching demonstration.
- Solder Trough – Effectively a single turn coil in the form of a circular trough. Approximately 300 mm of solder is formed into a 50 mm dia meter circle to lie in the trough.
PH50172AC/1 -
Electricity
Demonstration Transformer Power Supply
The demonstration transformer power supply is a unique power supply designed for use specifically with the Demonstration Transformer
(PH50172A and PH50172S).- Output Voltage: Fixed output of 4 & 8V DC @ 5A, 2 & 4V AC @ 5A.
- Output Voltage for Mains Coil Substitute: 4V @ 10A.
- With Resettable short circuit protection.
PH50172AC/3 -
Electricity
Demonstration Transformer Set, Standard
The standard demonstration transformer set allows users to use the traditional 800 turns mains coil instead of the dedicated power supply. This is a more economical option but users do not benefit from the enhanced safety features of Demonstration Transformer Set.
Includes:
- 4 U and I Core Set.
- 5 800 Turns Mains Coil.
- 6 300, 600, 600-0-600, 900, 1800 turns coils.
PH50172S -
Electricity
Transformer Stand and Core
Apparatus is designed primarily for demonstration of the basic principles of transformers. It consists of a laminated U-core with laminated I-core, both with 30 x 25 mm cross-section to form a closed core of size 105 x 140 mm. Heavy aluminium alloy stand with removable clamping rods, 2 pole pieces, each 65 x 25 x25 mm with one end cone-shaped, to accept support rod and shading ring. Poles also have a hole drilled through lengthwise to take a light beam.
PH50175 -
Electricity
Accessories Set for Demountable Transformer
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.
PH50180
+1 (630) 345-3450