The basic goals of circuit protection are to 1) localize and isolate the condition or fault and 2) prevent and minimize any unnecessary power loss. There are several types of abnormal conditions that may occur throughout a building’s life, in which an electrical system must be designed to correct or overcome.
What is the importance of protective device in an electrical circuit?
Why are circuit protective devices important? 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 is the purpose of protection devices?
Protective devices are used to maintain the primary function by means such as bringing in standby equipment when the main equipment fails or to provide protection in relation to secondary functions such as safety or environment.
What are electrical protective devices?
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 stops electricity from passing through?
Materials that do not allow electricity to pass easily through them are called insulators. Rubber, glass, plastic, and cloth are poor conductors of electricity. This is why electrical wires are covered in rubber, plastic, or cloth. Electricians even wear rubber gloves when they are working with electrical wires.
What are the main features of a protective device?
Protective Device Characteristics
- Fuse Characteristics.
- Relay Characteristics.
- Power Circuit Breakers.
- Automatic Circuit Reclosers.
- Automatic Line Sectionalizers.
- Circuit Switchers.
- Digital Fault Recorders.
What are 3 types of circuit protectors?
There are two general categories of circuit protection: 1) Fuses 2) Electro-mechanical circuit breakers. Each has its advantages which will be discussed here. Fuses break down into three convenient categories —fast-blow, slow- blow, and semiconductor. Each responds to fault current in different ways.
What are the types of electrical devices?
The following components are among the most common found in electronic devices:
- Circuit Breakers.
Can rubber gloves prevent electric shock?
Selected properly, insulating rubber gloves will do the job of protecting the worker against electrical shock. Do not forget about leather protectors, for they are an essential part of wearing and using the insulating rubber gloves correctly.
Can electricity travel through a person?
Electricity is everywhere, even in the human body. Our cells are specialized to conduct electrical currents. Electricity is required for the nervous system to send signals throughout the body and to the brain, making it possible for us to move, think and feel.