Breckland Scientific 2023 Catalogue
Principles of Electricity
HIGH VOLTAGE ELECTRICITY TRANSMISSION SIMULATION This ‘National Grid’ simulation apparatus simply and effectively demonstrates how and why electricity is transmitted across national grid networks by high voltage and not low voltage. The safe-to-use apparatus consists of two clear boxes which each house a transformer and associated electric circuitry to step-up and step-down the voltage - providing a simulation of the high voltage output from a power station and subsequent step-down at an electricity sub-station. Each box has a high voltage and low voltage output/input, to compare the two modes of transmission. The two boxes are linked by plastic insulated resistance wires, via ‘pylons’, to simulate real power lines. The ends of the wires are safely housed in touch-proof plugs which lock into place in the boxes, preventing any possible electric shock. During use, the transmission wires can be lightly gripped to give an understanding of how energy is lost as heat. The 12V SBC bulbs can be connected to the output and input sides of the apparatus, to visibly show the difference in brightness, due to power loss, between transmission at high and low voltages. Both boxes have 2mm output sockets, to allow voltage readings to be taken via the probes of a multimeter or 2mm to 4mm plug leads. Requires 12V a.c. input from a standard laboratory power supply. Comes complete with transmit and receive boxes, insulated resistance wires, two mounted SBC lamps and full instructions. Also available separately is an Earth Return add-on kit, to demonstrate the use of earthing in the National Grid system. Cat No. Description Price Per 1 ELP-350-110 Electricity Transmission Simulation 169.77 ea. 2 ELP-350-120 Earth Return Add-on Kit 16.38 ea. 3 BELL DEMONSTRATION Mounted on a large panel, all parts easily visible, rigid constructions to show the connections on a vertical stand. Operates on 4-6 volts DC. Height 122mm. Cat No. Description Price Per ELM-050-100 Bell Demonstration 30.97 ea. 4 RELAY DEMONSTRATION The Relay Demonstration Unit allows the investigation and study of how a relay functions, in a clear and practical manner. A useful property of this unit is that the circuit powering the coil is easily seen to be completely separate from the circuit switched on by the relay. This is one of the reasons relays are used where a safe low voltage circuit can be used to control a high voltage circuit. Coil Input 4-6V DC Bulb Input Max. 6V AC / DC. Cat No. Description Price ELM-300-100 Relay Demonstration 37.38 ea. 5 LEMON CLOCK Simply add your own lemon to turn this kit into an amazing lemon powered clock. Supplied with two metal rods consisting of copper and zinc and an LCD clock. Cat No. Description Price Per HEC-400-100 Lemon Clock 9.26 ea. 6 LASCELLS LEMON LED A low powered LED comes securely contained within a robust tube for protection. Suitable for use with lemons as ‘batteries’. Zinc and copper pieces for connections are not included but are available separately. Crocodile clips, leads and lemons not included. Cat No. Description Price Per HEC-415-100 Lemon LED 5.83 ea.
Electricity Transmission Simulation showing Earth Return (power supply not included)
National Grid Earth Return Kit
National Grid Pilons included
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