0
Anything that is in contact with the medium conducting the over-current. In an ideal situation a breaker should trip or a fuse should blow. If not wire insulation can melt, the wire itself can melt or various components can either melt or burn outright.
Sq D used a motor overload heater that was used on its motor overload contactor. It was designed as a ratchet on the end of a shaft that was inserted in a barrel on the body of the overload. A melting alloy held the shaft in the barrel. The ratchet on the end of the shaft held a spring loaded contact in the closed position. The body of the overload was bolted in series with the load terminal on the output side of the contactor. When the motor load current heated the overload protection device above its trip point, the alloy melted allowing the shaft to turn in the barrel portion of the overload heater. Being spring loaded the ratchet turned from the spring pressure and opened the normally closed contact thereby opening the magnetics coil circuit, dropping the contactor open and shutting the motor off.
What else can I help you with?
How does a switch control an electric device?
A switch basically represents a gap in the electric circuit. Electric current can pass through a circuit only if it is complete. An incomplete circuit can never pass a current through it. When the switch is in the 'off' position, the circuit has a break (gap) in it. When you put the switch in 'on' position, the circuit wire join and the circuit gets completed.
Does miliamperes increase as does battery voltage when put in a series configuration?
The current in a circuit, expressed in milliamperes, is1,000 x (battery or power supply voltage)/(resistance connected between the power supply terminals)If you increase the voltage of the battery or power supply, the current in the circuitincreases proportionally, at least until something in the circuit gets hot, melts, fuses,and opens the circuit.
How is current distributed in a series circuit?
In a series circuit, all components gets the same amount of current passing through them.
What happens to electric current as voltage gets large?
If the resistance of the load is kept more-or-less constant, then the current also becomes larger. On the other hand, if the power of the load is kept more-or-less constant, then the current becomes smaller.
Contrast how a fuse and a circuit breaker work to prevent overloading in circuits?
They stop electrical applications like washing machines from harming us if they malfunction.Suppose something goes wrong and the live wire gets connected to the casing. You are now at risk from a fatal electric shock but the fuse stops this. Because the earthing wire is connected to the case and it offers little resistance energy surges down it. This overloads the fuse which melts thus breaking the circuit and protecting you.Additional AnswerIt should be noted that a fuse or circuit breaker is designed to protect a circuit against an over current. It is not designed to protect people!
What is an electrical tool that melts to open a circuit if an electrical current gets too high?
fuse
How can a fuse stop the current flowing if the currents to big?
it gets broken A fuse is specifically designed so that when the current exceeds its specified rating, the fuse itself fails in some way (usually, part of it melts or burns out). When the fuse "blows", the circuit is cut open, so current can no longer flow.
This melts if the current gets to high?
The conductor's insulation can melt if the current gets higher than the ampacity of the conductor.
How does a switch control an electric device?
A switch basically represents a gap in the electric circuit. Electric current can pass through a circuit only if it is complete. An incomplete circuit can never pass a current through it. When the switch is in the 'off' position, the circuit has a break (gap) in it. When you put the switch in 'on' position, the circuit wire join and the circuit gets completed.
If a current get too big and melts a wire what is it called?
If a current gets too big and melts a wire, it is called an overload. This can happen if the amount of current flowing through the wire exceeds its rated capacity, causing it to overheat and melt. It is important to use properly rated wires and circuit breakers to prevent overloads.
What are fuses and circuit breakers What are they for?
Fuses and circuit breakers are electrical safety devices that protect circuits from overcurrent and electrical fires. Fuses contain a thin wire that melts when current exceeds a safe level, interrupting the circuit. Circuit breakers use an electromechanical mechanism to trip and interrupt the current flow when an overcurrent is detected. Both components are crucial in preventing electrical hazards in homes and buildings.
What effect does adding devices have on the resistance of the series circuit?
Many circuits have safety devices such as fuse. A fuse contains a substance that melts if it gets hot. if a short circuit happens, the heat causes the fuse to melt. The circuit is broken. because the current stops ,no damage is done.
Can an electric circuit burn paper if it comes into contact with it?
Yes, if the circuit gets hot enough.
What happens in a fuse when the current gets too high?
When the current in a fuse gets too high, it generates excessive heat due to the increased resistance in the fuse element. This heat causes the fuse element to melt or "blow," breaking the circuit and interrupting the flow of current to protect the electrical system from damage or fire.
What device is a fuse?
A fuse is an electrical device that is designed to protect an electrical circuit from overcurrent by breaking the connection when a fault occurs. It consists of a thin wire that melts when the current exceeds a certain value, interrupting the flow of electricity.
Does miliamperes increase as does battery voltage when put in a series configuration?
The current in a circuit, expressed in milliamperes, is1,000 x (battery or power supply voltage)/(resistance connected between the power supply terminals)If you increase the voltage of the battery or power supply, the current in the circuitincreases proportionally, at least until something in the circuit gets hot, melts, fuses,and opens the circuit.
How is current distributed in a series circuit?
In a series circuit, all components gets the same amount of current passing through them.
