What is a Voltage Transformer?
Electricity is the vital force behind most machines. Electric power flows through several substations between power stations and the consumer, and voltage may be changed in several steps. The voltage generated in the power plant is transmitted and fed to several industrial units and residential areas. It has to be ensured that the voltage generated is of favorable value and that the voltage received after transmitting over several lines has not suffered major losses.
Therefore, it is important to measure and manage it correctly. Such measurements cannot be made using conventional voltmeters. One of the tools used to measure it is a Voltage Transformer by companies like Gemini Instratech. It is also known as Voltage Sensor. It measures the voltage in the circuit and transforms it to a lower level.
Voltage Transformer Manufacturer take great care in ensuring that the primary and secondary winding are accurate, that is the number of turns in the primary winding is greater than the number of turns in the secondary winding.
Types of Voltage Transformer
Primarily, the voltage transformers are of three types –
1. Electromagnetic
This type of VT uses a wire-wound core. The primary voltage turns entirely into secondary voltage. Electromagnetic VT applications can be employed in the field of electrical metering. They safeguard electrical instruments and protect the feeder. Also, they make generators protected from damage and establish electrification of industries.
2. Capacitor
This type of VT uses a capacitive divider, which is linked between the main-line phase and the ground. It is considered a hybrid device as it is a mixture of a capacitive divider and a magnetic transformer. This type of VT can be utilized for voltage metering in addition to being employed as a protection system. The capacitors may reduce the voltage levels and then transformers step down the lowered voltage to a supplementary voltage level.
3. Optical
This is a new type of VT and is mainly used for safety and metering applications. This type of VT requires significant contracts with manufacturers to operate as it cannot be controlled by local professionals.
Pros
- It measures very high voltage on transmission lines.
- It enables an ordinary voltmeter to measure very high voltages.
- It also protects by electrically isolating the voltmeter and high-voltage line.
Cons
- A voltage transformer cannot measure DC voltage.
- They are a little expensive.
Voltage Transformer Applications
1. Converting voltages from higher or lower levels to the alternate level
Voltage transformers consist of a primary and secondary coil wound around one or more iron cores. When voltage is applied to the primary coil, an electrical current is produced in the secondary coil. It allows voltage conversion. Despite being complex devices, they are quite simple and intuitive to operate. They are employed in various applications from data processing to telecommunications.
2. Filtering interference from power supplies
VT is used to filter out unwanted noise from electrical currents. These transformers take incoming voltage and convert it into lower levels, reducing any unwanted fluctuations. This allows all the connected devices to operate reliably and without interruption. By reducing the interference levels in power supplies, the VT can help to improve overall efficiency.
3. Converting AC to DC
Converting Alternate Current to Direct Current is one of the most common uses of Voltage Transformers. The process of conversion is called rectification. Voltage Transformers take the incoming AC voltage and convert it into DC voltage that electronic devices can use. It helps in reducing power consumption.
4. Providing Isolation between circuits
Another VT application is basically to prevent electrical interference caused when one circuit interferes with another. They work by providing a barrier between two circuits. This ensures the smooth and accurate running of a circuit without interruption. Isolating circuits from each other prevents dangerous electrical shocks and hence, improves system safety.
5. Providing Voltage Regulation
Voltage regulation is necessary to ensure that the output voltage of a power supply is within the required range. VT also helps in reducing power consumption caused by using higher voltage than the required range.
Conclusion
Voltage Transformers are essential components of many different types of electrical systems. They play a vital role in the safe and smooth running of these systems. Gemini Instratech, a Voltage Transformer Manufacturers, offers high quality and reliable voltage transformer applications. We have domain experience, competence, and compatibility to manufacture, test, and supply world-class voltage transformer applications.
