no
If you are describing a circuit breaker then its electromagnetic trip component will operate in the event of a line*-to-ground (*not 'phase'!) short circuit. The thermal overload component will only operate in the event of a sustained overload.
The GFCI circuit breaker may not reset due to a faulty connection, a ground fault in the circuit, or a malfunction in the breaker itself.
A circuit breaker can trip due to overloading, short circuits, or ground faults.
In North America they are known as a GFCI. Ground Fault Circuit Interrupter breaker.
Ground fault relays sense ground faults in the circuit and trigger a circuit breaker to trip off
A circuit breaker trips when there is an overload of electrical current flowing through the circuit, a short circuit, or a ground fault. This causes the circuit breaker to automatically shut off to prevent damage or fire.
To wire a GFI (Ground Fault Circuit Interrupter) breaker, first turn off the power to the circuit. Then, connect the hot wire to the breaker's terminal, the neutral wire to the neutral bar, and the ground wire to the ground bar. Finally, attach the breaker to the panel and turn the power back on.
you have a short to ground in the electrical circuit that that breaker is on.
A GFCI device in a breaker is intended to trip the breaker open when a ground fault is sensed in the circuit that the breaker is protecting.
A circuit breaker may trip with no load due to a short circuit, ground fault, or overheating. These issues can cause excessive current flow, triggering the circuit breaker to protect the electrical system from damage or fire.
2
The circuit breaker may trip with no load due to a short circuit or a ground fault in the electrical system, which can cause an excessive flow of electricity and trigger the breaker to shut off for safety reasons.