Wednesday, 19 November 2014

How To Why testing of Current Transformer is Necessary!


The usage of electrical appliances has become a common phenomenon in everyone’s life but determining its safety is very necessary aspect in order to ensure a good life.

Experts say using the direct power carrying conductors are not a safer thing to use rather one should use something like voltage stabilizer which stabilizes the volts and let the required level flow to the electrical devices/ instruments/ appliances. They actually provide voltage and currents to the manageable levels. Let’s explore today about different aspects of current transformer.


current transformer

Current transformer!

Invented towards the end of 19thcentury, transformer has become an integral part of power system without which the proper functioning and distribution of power would never be possible. It means stable power supply is the result of transformer. Earlier, DC systems were used for the supply of electricity but with the installation of current transformer, power distribution becomes flexible as well as efficient.

This raises a question what is transformer. A transformer is an electrical device which is basically used to convert the voltage of one magnitude to another without bringing any changes to the frequency. It also brings changes to voltage without bringing any change to the frequency. It reduces high voltage currents to lower value and provides convenient electrical current flow with the help of standard ammeter.

Current transformer consists of either one or few primary winding turns due to which it has also been called as series transformer. One can find variety of current transformers which is an instrument used for measuring and protecting devices. Here is highlighted few important types of current transformer.

Roles to Perform!
The main role of current transformer for which it is highly known is providing the current adjusted according to the required level. It helps in reducing the level of current from thousands of amperes to the standard or required level or as low as 5 amps or even 1 amp. For this purpose, accurate instruments are connected with current transformers which keeps it insulated away from high voltage power lines. For knowing the current flowing through it, a number of metering applications can be found which includes wattmeter’s, power factor meters, watt hour meters, protective relays, MCB, magnetic circuit breakers and such more. It ensures the right flow of current.

Friday, 24 October 2014

AC Electrical Motors and Other Types: Perfect for Professional Organizations

With the advent of technologies, the electrical motors have gained a huge success in various professional tasks. There are different types of AC motors available today, which provide a variety of benefits to the professionals. You can read about some of the motors and their differences below:

Ac Electric Motors
Ac Electric Motors
AC Motors: The alternating currents drive the AC electrical motors. Rotating magnetic fields are produced by the coils of a stationary stator. They render a torque to a rotor mounted on a shaft. Synchronous motor and induction motor are two types of AC motors. The synchronous motor is meant for rotating at line frequency.

DC Motors: They use the permanent magnet stators and torque of the rotor and shaft are caused by it by maintaining the field relations between by stator and rotor by dc currents via brushes that switch the currents appropriately as the shafts rotates.

Induction Motors: The induction motors turn a bit slower as compared to the supply frequency. An induced current creates the magnetic field on the rotor of the induction motor. Torque is the pursuit of the slip in frequency between rotation and supply.

Permanent Motors: The permanent motors are used in a large number of motors in the present scenario. But, it is questionable to have a strict permanent motor because of the reason that it would appear to facilitate perpetual motion.

All these electric motors work well in converting the electric energy to mechanical energy. Most of the electric motors work through the interaction between winding currents and an electric motor’s magnetic field.