Description
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Trans-Ratio
Description
Trans-Ratio is a simple transformer system that allows students to investigate the relationship between primary voltage, secondary voltage and the turns ratio.
The Primary coil has tappings at 200, 400 and 600 turns while the Secondary has 100, 200, 300, 400, 500 and 600 turns all brought out to 4mm sockets.
An AC supply of upto 6 V as well as AC voltmeters are required for demonstration purpose.
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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.
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