# Characteristic Impedance Ratio (C.I.R.)

**Definition:** The maximum value of the system impedance ratio for which the relay performance remains within the prescribed limits of accuracy.

## Related Links

Characteristic impedance – Wikipedia

[TITLE]

[TITLE]

[TITLE]

[TITLE]

[TITLE]

## Related Videos

### What is Characteristic Impedance?

### characteristic impedance transmission line

### How to Calculate Characteristic Impedance

### Electro Magnetics - Characteristic of Impedance

### Characteristic Impedance

### Characteristic impedance

### Derivation of Characteristic Impedance of a transmission line

### Tutorial: Electrical impedance made easy - Part 1

### Resistance, Reactance and Impedance

### What is Characteristic Impedance?

### characteristic impedance transmission line

### How to Calculate Characteristic Impedance

### Electro Magnetics - Characteristic of Impedance

### Characteristic Impedance

### Characteristic impedance

### Derivation of Characteristic Impedance of a transmission line

### Tutorial: Electrical impedance made easy - Part 1

### Resistance, Reactance and Impedance