Once inside your house, the PEN conductor is separated into neutral and earth inside your consumer unit / distribution board aka fuse board. (This is known as a TN-C-S system which is the most common in the UK. One is the live conductor, and the other is a combined protective earth and neutral (PEN) conductor. Your home is supplied with a cable from this transformer that has two conductors. In the electrical substation that feeds your home lurks a huge chunk of copper and iron (the transformer) that takes relatively high voltage electrical power and converts this to our recognised 230-240V voltage that we all know. You probably don’t know it, but your mains supply is most likely provided to you via an isolation transformer. Wikipedia – Isolation Transformer Typical Electrical Arrangement A transformer sold for isolation is often built with special insulation between primary and secondary, and is specified to withstand a high voltage between windings. Isolation transformers provide galvanic isolation and are used to protect against electric shock, to suppress electrical noise in sensitive devices, or to transfer power between two circuits which must not be connected. Tagged in isolation transformer white paper What is an Isolation Transformer?Īn isolation transformer is a transformer used to transfer electrical power from a source of alternating current power to some equipment or device while isolating the powered device from the power source, usually for safety reasons.
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