Equipment applied to electric power systems to detect abnormal and intolerable conditions and to initiate appropriate corrective actions. These devices include lightning arresters, surge protectors, fuses, and relays with associated circuit breakers, reclosers, and so forth.
What do electrical protective devices do?
Protective devices are important because they ensure that under fault conditions, a high fault current cannot flow – as well as protecting the installation this, more importantly, ensures that consumers are not injured or killed as a result of an electrical fault.
What are electric safety devices and what are they designed to do?
Electrical safety systems and devices are employed to prevent thermal and shock hazards. Circuit breakers and fuses interrupt excessive currents to prevent thermal hazards.
What are circuit protection devices designed for?
Circuit protection devices automatically prevent dangerous or excessive amount of current or a short circuit in an electrical conductor.
What are the protection devices for electrical installations explain?
RCCB, MCB, fuses, ELCB, are all devices used to protect users and equipment from fault conditions in an electrical circuit by isolating the electrical supply.
How does an overcurrent device work?
An overcurrent protection device protects the circuit by opening the device when the current reaches a value that will cause an excessive or dangerous temperature rise in conductors. Most overcurrent protection devices respond to both, short-circuit or ground-fault current values as well as overload conditions.
What device can be used to protect an electrical circuit?
Circuit breakers act as resettable fuses . These are automatically operated electrical switches that protect electrical circuits from overloading or short circuiting. They detect faults and then stop the flow of electricity.
How does electricity flow to your appliances and gadgets?
Electricity flows in a closed circle, called a circuit. To reach our homes, electricity travels from power stations, through transmission lines and distribution lines, until it flows into the wires that power our devices.
Which device is used for excess current protection?
Standard fuses and circuit breakers are commonly used overcurrent protection devices (OCPD) to control overcurrent (overload and faults).