Difference between AC Breakers and DC Breakers
The fundamental difference is how the arc is extinguished:
• AC breakers use current zero,
• DC breakers require unique mechanisms owing to continuous current flow.
| Parameters | AC Breaker | DC Breaker |
|---|---|---|
| Current Type | It is designed for use with alternating current (AC). | The design is intended for direct current (DC). |
| Arc Extinction | Because of the natural current zero, it is simpler. | Harder since there is no natural current zero. |
| Arc Quenching Method | Utilizes the current zero crossing in order to put out the arc | Needs magnetic blow-out, vacuum, (or) other procedures. |
| Contact Design | Reduced complexity as a result of its self-extinguishing capacity | Handling extended arcing is complex. |
| Breaking Capacity | Typically lower for a given voltage. | Higher due to the more challenging arc control. |
| Applications | Widely utilized in power transmission and distribution. | Used in DC systems like solar, battery banks, and traction. |
| Cost | Generally less expensive. | Generally more expensive because of design. |
