Simple Transformer: - It’s a four wire transformer. These types of transformer have 2 wires on primary winding and 2 wires on secondary output. Symbol of this transformer is shown below. Voltage rating of these transformer expressed as 6V,12V, 24V etc.
Central Tapped transformer: - It’s a 5 Wire transformer. This type of transformer has 2 wires on primary winding and 3 wires on secondary. Middle one is known as Common. Voltage rating of these transformer expressed as 6-0-6 V, 12-0-12 V, 24-0-24 V etc.
Specification of transformer Of Tapped transformer While purchasing a transformer generally two considerations have to be kept in mind, first one is voltage rating and second is current rating. Voltage rating depends upon the circuit’s operating voltage its generally 5 or 12 Volt so 6 or 12 Volt transformers are generally used. Current rating of transformer depends upon the load of circuit. If our load current is more than the transformer current then due to loading effects transformer can burn out. So to protect our transformer, current rating of transformer should be more than the load current. All transformer comes with different current rating e.g. 6 V transformer is available in 500m A, 750mA, 1A, 2A so on. One thing should be kept in
21 | P a g e