1 Answer
The ratio of CT (Current Transformer) and PT (Potential Transformer) refers to the primary to secondary ratio for each transformer, and these ratios are important for accurate measurement and protection purposes.
1. **CT (Current Transformer) Ratio:**
- The CT ratio indicates how much current in the primary circuit corresponds to the secondary circuit.
- For example, a CT with a ratio of **1000/5** means that for every 1000 A of current flowing in the primary, the secondary side will have 5 A. The ratio is typically written as **Primary/Secondary**.
2. **PT (Potential Transformer) Ratio:**
- The PT ratio indicates the voltage reduction from the primary to the secondary side.
- For example, a PT with a ratio of **11000/110** means that for every 11,000 V in the primary, the secondary side will have 110 V. Again, the ratio is written as **Primary/Secondary**.
### Ratio Comparison:
- **CT Ratio Example**: **1000/5** means 1000 A in the primary equals 5 A in the secondary.
- **PT Ratio Example**: **11000/110** means 11,000 V in the primary equals 110 V in the secondary.
In short, both CT and PT have a **primary to secondary ratio**, but one is for current (CT) and the other is for voltage (PT). These ratios help to scale down high values of current and voltage to safe levels for measurement and protection.
Let me know if you'd like more clarification on these!
1. **CT (Current Transformer) Ratio:**
- The CT ratio indicates how much current in the primary circuit corresponds to the secondary circuit.
- For example, a CT with a ratio of **1000/5** means that for every 1000 A of current flowing in the primary, the secondary side will have 5 A. The ratio is typically written as **Primary/Secondary**.
2. **PT (Potential Transformer) Ratio:**
- The PT ratio indicates the voltage reduction from the primary to the secondary side.
- For example, a PT with a ratio of **11000/110** means that for every 11,000 V in the primary, the secondary side will have 110 V. Again, the ratio is written as **Primary/Secondary**.
### Ratio Comparison:
- **CT Ratio Example**: **1000/5** means 1000 A in the primary equals 5 A in the secondary.
- **PT Ratio Example**: **11000/110** means 11,000 V in the primary equals 110 V in the secondary.
In short, both CT and PT have a **primary to secondary ratio**, but one is for current (CT) and the other is for voltage (PT). These ratios help to scale down high values of current and voltage to safe levels for measurement and protection.
Let me know if you'd like more clarification on these!