Circuit breaker with thermal and magnetic overload symbol
A very specific question!
The symbol you're referring to is likely a combination of two symbols:
- The thermal overload symbol: This is a triangle with a dot in the center, often represented as Δ.
- The magnetic overload symbol: This is a circle with a dot in the center, often represented as ℗.
When combined, the symbol for a circuit breaker with both thermal and magnetic overload protection is:
Δ℗
This symbol indicates that the circuit breaker is designed to trip in response to both thermal (overheating) and magnetic (overcurrent) overload conditions.
Here's a breakdown of what each part of the symbol represents:
- Δ (thermal overload symbol): Indicates that the circuit breaker is designed to trip in response to excessive heat buildup in the circuit, often due to a fault or overload condition.
- ℗ (magnetic overload symbol): Indicates that the circuit breaker is designed to trip in response to excessive current flow in the circuit, often due to a short circuit or overcurrent condition.
By combining these two symbols, the Δ℗ symbol indicates that the circuit breaker is capable of detecting and responding to both thermal and magnetic overload conditions, providing a higher level of protection for the circuit and the equipment connected to it.