1 Answer
The term "200/5" in the context of a **current transformer (CT)** refers to its **current ratio**. Here's a breakdown of what that means:
- **200**: This is the **primary current** rating, which indicates the current flowing through the primary winding of the transformer. In this case, the primary current is 200 Amps.
- **5**: This is the **secondary current** rating, which shows the current that will flow through the secondary winding of the transformer. In this case, the secondary current is 5 Amps.
In simple terms, a **200/5 current transformer** is designed to scale down a high current (200 Amps) to a lower, more manageable current (5 Amps). This allows you to safely measure and monitor high currents using instruments (like ammeters) that are designed for lower currents (5 Amps).
### How it works:
- If the primary circuit carries 200 A of current, the CT will produce a secondary current of 5 A.
- If the primary current increases, the secondary current increases proportionally, maintaining the 200/5 ratio. For example, if the primary current is 400 A, the secondary current will be 10 A.
Current transformers are commonly used in power systems to measure high currents without directly connecting measurement devices to the high-current circuit.
- **200**: This is the **primary current** rating, which indicates the current flowing through the primary winding of the transformer. In this case, the primary current is 200 Amps.
- **5**: This is the **secondary current** rating, which shows the current that will flow through the secondary winding of the transformer. In this case, the secondary current is 5 Amps.
In simple terms, a **200/5 current transformer** is designed to scale down a high current (200 Amps) to a lower, more manageable current (5 Amps). This allows you to safely measure and monitor high currents using instruments (like ammeters) that are designed for lower currents (5 Amps).
### How it works:
- If the primary circuit carries 200 A of current, the CT will produce a secondary current of 5 A.
- If the primary current increases, the secondary current increases proportionally, maintaining the 200/5 ratio. For example, if the primary current is 400 A, the secondary current will be 10 A.
Current transformers are commonly used in power systems to measure high currents without directly connecting measurement devices to the high-current circuit.