Its All About Electrical
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Its All About Electrical
2y ago
A vacuum circuit breaker is a kind of circuit breaker where the arc quenching takes place in vacuum medium. Operation of switching on and closing of current carrying contacts and interrelated arc interruption takes place in a vacuum chamber in the breaker which is called vacuum interrupter.
Construction:
The vacuum circuit breaker comprises a steel arc chamber in the center-symmetrically arranged ceramic insulators. The pressure inside the vacuum interrupter is maintained below 10^-4 torr.
The material used for current carrying contacts plays an important role in the performance of the vacuum ..read more
Its All About Electrical
2y ago
Types of Circuit Breakers w.r.t Arc Quenching Medium
Following are different types of Circuit Breakers w.r.t Arc Quenching Medium
Vacuum Circuit Breaker
SF6 Circuit Breaker
Oil Circuit Breaker
Air Blast Circuit Breaker
1. Vacuum Circuit Breaker:
A circuit breaker is a device that interrupts an electric circuit to prevent unwarranted current caused by a short circuit, typically resulting from an overload.
A vacuum circuit breaker is a kind of circuit breaker, where the arc quenching takes place in vacuum medium. The operation of switching on and closing of current carrying contacts, and inter ..read more
Its All About Electrical
5y ago
Equipment of Switch Gear
Following are the main Equipment of Switch Gear,
1) Switches
A switch is main equipment of switch gear, it is a device which is used to open or close an electrical circuit in a convenient way. It can be used under full-load or no-load conditions but it cannot interrupt the fault currents. When the contacts of a switch are opened, an arc is produced in the air between the contacts. This is particularly true for circuits of high voltage and large current capacity. The switches may be classified into:
a) Disconnector (or isolator)
This switch is a manually-operated, locka ..read more
Its All About Electrical
5y ago
A circuit breaker is an equipment which can open or close a circuit under all conditions viz. no load, full load and fault conditions. It is so designed that it can be operated manually (or by remote control) under normal conditions and automatically under fault conditions. For the latter operation, a relay circuit is used with a circuit breaker.
Types of Low Voltage Circuit Breakers
1. Miniature Circuit Breaker
A miniature circuit breaker (MCB) automatically switches off electrical circuit during an abnormal condition of the network means in overload condition as well as faulty condition. N ..read more
Its All About Electrical
5y ago
Photovoltaic solar panels absorb sunlight as a source of energy to generate direct current electricity. A photovoltaic (PV) module is a packaged, connected assembly of photovoltaic solar cells available in different voltages and wattages.
Photovoltaic modules constitute the photovoltaic array of a photovoltaic system that generates and supplies solar electricity in commercial and residential applications. Difference Between Monocrystalline and Polycrystalline Solar Panels are given below with advantages and advantages of both types.
Mono-crystalline solar panels:
The mono-crystalline solar ..read more
Its All About Electrical
5y ago
Switch Gear:
The apparatus used for controlling, regulating and switching on or off the electrical circuit in the electrical power system is known as switch gear. It also includes the combination of switching devices with associated control, measuring, protecting and regulating equipment. The switch gear devices and their assemblies are used in connection with the generation, transmission, distribution, and conversion of electrical energy. We all are familiar with low voltage switches and re-wireable fuses in our homes. Switches are used for opening and closing an electric circuit while fuses ..read more
Its All About Electrical
5y ago
Energy Meter
Energy meter is an instrument which measures amount of electrical energy used by the consumers. Utilities install these instruments at every place like homes, industries, organizations to charge the electricity consumption by loads such as lights, fans and other appliances. When energy savings during certain periods are desired, some meters may measure demand, the maximum use of power in some interval. “Time of day” metering allows electric rates to be changed during a day, to record usage during peak high-cost periods and off-peak, lower-cost, periods. Also, in some areas meters ..read more
Its All About Electrical
5y ago
Electromechanical induction type Energy meter
An electricity meter, electric meter, electrical meter, or energy meter is a device that measures the amount of electric energy consumed by a residence, a business, or an electrically powered device.
It is the popularly known and most common type of age old watt hour meter. It consists of rotating aluminum disc mounted on a spindle between two electro-magnets. Speed of rotation of disc is proportional to the power and this power is integrated by the use of counter mechanism and gear trains in. It comprises of two silicon steel laminated electromagn ..read more
Its All About Electrical
5y ago
Both synchronous and induction machines work on AC supply, ie; they are AC machines. For AC machines, the basic requirement is to create a rotational magnetic field so that the rotor can rotate, and energy can be obtained. (mechanical for motor, electrical for alternator) Now, the difference between a synchronous machine and an induction machine is based on how the rotational magnetic field is utilized.
The three phase supply, when given to the stator windings, creates a rotating magnetic field. Now, the rotor of an induction machine is a group of short circuited windings where the rotating m ..read more
Its All About Electrical
5y ago
Electrical motor in general is an electro-mechanical device that converts energy from electrical domain to mechanical domain.A synchronous electric motor is an AC motor in which, at steady state,[1] the rotation of the shaft is synchronized with the frequency of the supply current; the rotation period is exactly equal to an integral number of AC cycles. Synchronous motors contain multiphase AC electromagnets on the stator of the motor that create a magnetic field which rotates in time with the oscillations of the line current. The rotor with permanent magnets or electromagnets turns in step wi ..read more