When an overload occurs, it means that the load draws current greater than the current amperage rating of that wire. This causes the wires to overeat and potentially cause a fire. For instance, motors have amperage ratings that are not meant to be exceeded. If they were to be exceeded, this causes a motor overload condition, which will cause the motor to overheat and burn out. Same concept and hazards apply. Save my name, email, and website in this browser for the next time I comment.
Skip to content One of the major difference between the short circuit and the overload is that the short circuit occurs because of the fault between the lines or line-to-earth whereas the overload means the equipment draw the excess of current from the supply. Key Differences Between Short Circuit and Overload The short circuit means the voltage at the fault points reduces to zero and the large current starts flowing through the circuit whereas in the overloaded condition the load greater than the suitable value are applied to the system.
The voltage at the short circuit decreases to zero, whereas in the overloaded condition the voltages reduce, but it cannot be zero. During the short circuit, the resistance of the path of current becomes low due to which the heavy current flow through the circuit whereas in overload condition the magnitude of the current is high but appreciably low as compared to short circuit current.
The short circuit occurs in the system when the neutral and the live wire comes in contact with each other, whereas overload occurs when the number of electrical equipment connects to the same socket. Leave a Comment Cancel Reply Your email address will not be published.
Fast tripping is vital in short circuit protection. Overloads cause thermal tripping but short circuits cause electromagnetic tripping in the protective devices. Overloads shall be switched off only when the heat produced by them passes a pre-determined limit. For reason, the tripping time for smaller overloads is correspondingly longer than for heavier overloads.
Short circuit currents shall be broken without any delay. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Please enter an answer in digits:. Skip to content Home Technical Knowledge Short circuit vs overload. Table of Contents. Previous: Electrical safety devices that can be found at home.
Next: Type 1 and Type 2 coordination. Leave a Reply Cancel reply Your email address will not be published. The maximum allowable current details can be collected from the nameplate details. The short circuit is a term which is mostly used in circuit breaker and overload is a term which is used in the electrical motor. A short circuit can be defined as the unplanned connection between two conductors is called a short circuit. It occurs between phase to phase, phase to ground and phase to the same phase.
In this, the phase to phase short circuit is very dangerous and which creates a high current flow through the conductor than the phase to ground and phase to the same phase fault. Now you will get doubt about why high current is created on the short circuit?
Technically, the resistance between the two conductors will become approximately zero on the short circuit. Here the entire line voltage will be dropped across the small resistance.
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