Voltage Transformers are used for metering and security in high-voltage circuits. They are designed to preclude negligible load to the provide being measured and have an exact voltage ratio to accurately step down high voltages so that metering and protective relay equipment can be operated at a lower potential. Voltage Transformers are used with grounded (3-pin) appliances and can be used with both "electric" and "electronic" appliances. They can be used continuously for long periods of time and at higher wattages.
There are low voltage transformers (Step Down) and high voltage (Step Up) transformers. While the previous are used to step down voltage and convert it from 220V to 110V, the latter function by stepping up voltage and converting it from 110V to 220V. Some transformers are dual voltage also.
If you are thinking of buying a voltage transformer, the following tips will help you adopt the right transformer for your appliance:
1. Determine if your appliance easily requires a transformer. Look for the voltage rating on the appliance; if the rating states something similar to 100Vto 240V that means your goods is dual voltage. In such a case you can use your goods in a 220V without a transformer. If the voltage rating is 110V or 120V, it means that your goods is only single volt and will require a step down transformer for use in 220V.
2. Once you know that you require a voltage transformer, you need to Determine the right kind for your product. Look for the watt rating on the appliance or infer wattage by multiplying voltage x amps. adopt the transformer agreeing to the wattage rating of your appliance. It is better to use a transformer that is rated at least 25% higher than your product's wattage rating.
3. After choosing the right transformer, make sure that you have the permissible plug adapter on the transformer.
4. Always buy voltage transformers and adapters from a reputed source only.
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Buyers Guide For Voltage Transformers