Summary:Various types of current transformers are available in the market. The most common type of current t...
Various types of
current transformers are available in the market. The most common type of current transformer is a "donut style" transformer. This type of current transformer is used to convert high voltage signals to a measurable range of current. This type of current transformer is generally used with an ammeter. Other types of current transformers are used to measure low voltage current. These types of current transformers are also used in combination with protective relays.
A current transformer consists of a primary winding and a secondary winding. The primary winding is connected to the main circuit, while the secondary winding is connected to the measuring device. The windings are insulated with end collars and pressboards to protect them from sharp corners. The current transformer's primary winding carries the current flowing to the load, while the secondary winding carries the proportional current to the measured current.
Current transformers are usually rated to provide a secondary current of 5 amps. This means that when the primary current is 500 amps, the secondary current will be 5 amps. This is not a true representation of the input/output ratio. However, this is the most common rating. If the secondary current is accidentally open circuited, the secondary winding will generate a higher voltage than the primary winding. This can cause damage to the circuit.
Another type of current transformer is a toroidal current transformer. This type of current transformer is made up of a split core. In the center of the toroidal core, there is an opening, which allows current to be transferred from the primary winding to the secondary winding. This type of current transformer is used in outdoor applications. It also uses liquid to lubricate the windings and provide a smoother transition between the windings.
Mainly used in metering, serving as current sampling tool or the current measuring tool for general industrial instruments.
5(40)A/5mA,10(60)A/4mA,10(80)A/10mA,20(100)A/10mA,etc. are available. Can be customized.
High Accuracy, UP TO 0.1 class
Standard: GB1208 ‘Current Transformer’
JB/T10665 ‘Miniature current transformer’
China Manganin Shunts Manufacturers
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