#transformers spares

Transformer reliability is determined by various aspects, such as the insulation, temperature management, and the right transformer oil level. The transformer oil plays an important role in terms of insulation and cooling; hence, keeping track of the oil level is very crucial for safe and reliable operations of transformers. The magnetic oil gauge is an easy way through which the transformer operator can keep track of the oil level of the transformer conservator without having to come into physical contact with the oil.

For those who operate the transformer, maintenance staff, and electrical equipment operators, knowledge of how the magnetic oil gauge operates and installation procedures is vital in avoiding any operational problems that may arise.

What is a Magnetic Oil Gauge?

Magnetic oil gauge is another name for the MOG. This is a device whose aim is to indicate the oil level in the transformer conservator.

As the level of oil in the transformer fluctuates, the float rises and falls. The magnet, which is attached to the float, transmits this movement to the exterior indicating system, ensuring that the level of oil is monitored through a reading on the indicator without the need for a direct mechanical link.

This is very handy in cases of oil-filled transformers where constant oil level observation is required.

How Does a Magnetic Oil Level Gauge Function?

The working principle of a magnetic oil level gauge is fairly easy to understand.

In the conservator, the float rises and falls in accordance with the level of oil in the transformer. This results in the rotation of the magnet attached to the float. The movement of the magnet is conveyed to the exterior indicator via magnetic coupling, moving the pointer of the gauge to correspond with the level of oil.

This occurs in four stages:

Oil level changes: Transformer oil is capable of expanding and contracting due to operating conditions and temperatures.

Float changes: The float that is installed in the conservator will rise or fall depending on the oil level.

Magnetic changes: The magnetic device is sensitive to the float movements.

Pointer changes: The changes are reflected on the pointer, indicating the oil level on the dial.

Why Is a Magnetic Oil Gauge Important for Transformers?

Transformers depend on more than the core and windings to function effectively. Many transformer accessories are necessary for protecting and determining transformer conditions and making its normal operation. Choosing the correct spares and accessories allows for increasing transformer efficiency while minimizing maintenance and downtime.

Dhruti Sales is a transformer service provider that started its operations in 2019 and offers its customers a wide choice of transformer accessories, as well as transformer repair and maintenance. The company sells necessary transformer consumables and offers the services of transformer maintenance, oil leakage stopping services, OLTC repair, transformer testing, replacement of gaskets, workshop repair, and parts replacement.

Transformer Accessories Sold by Dhruti Sales

Buchholz Relay for Transformer

One of the important protective devices that are used in oil-filled transformers is a Buchholz relay that allows for determining the internal faults and helps in safe transformer operation. Dhruti Sales provides Buchholz relays among its range of protective devices.

2. Oil Surge Relay 

The function of Oil Surge Relays is to ensure safety for the On Load Tap Changer (OLTC) by assessing changes in the oil flow as well as changes in the pressure inside the OLTC tank. It helps in the detection of undesired situations in advance, thus making sure that the transformers function correctly.

3. Pressure Relief Valve 

Pressure Release Valves act as an essential member of the safety team for transformers. They give the transformer protection when needed by providing pressure relief.

4. Conservator Protection Relay 

What Is a Magnetic Oil Level Gauge?

A Magnetic Oil Level Gauge is one of the most important devices for monitoring oil levels in oil-filled transformers, conservators, and other equipment. This device serves as a visual indicator of the oil level. Therefore, there is no need for any oil contact.

Correct maintenance of oil level in the transformer is also important, as transformer oil helps both in insulation and cooling of the device. If the oil level becomes too low, the insulation will be compromised, which can lead to excessive heating.

The industries that depend on uninterrupted power supply will benefit from investing in a high-quality Magnetic Oil Level Gauge in order to get reliable transformers and avoid maintenance issues.

How Does a Magnetic Oil Level Gauge Work? 

A Magnetic Oil Level Gauge operates on the basis of magnetic coupling of a float within the conservator tank and an external indicator.

The way it works is quite simple:

Float rises and falls according to a transformer oil level.

The float has a permanent magnet in it.

The magnet rotates and the movement is transferred to the external pointer or dial through magnetic coupling.

This way oil level changes cause the pointer to display the level on the dial, and there is no physical connection between the moving parts of the tank and the pointer.

Such a design rules out any risk of leakage or non-reliable operation while allowing for continuous oil level indication.

Today a lot of gauges are also equipped with alarm contacts so that operators know when the oil level is dangerously low or high, enabling them to take preventive measures before any serious problems arise.

Advantages of Magnetic Oil Level Gauge

The major components of both electrical power distribution and industrial electrical systems are transformers, which rely on a variety of protective devices for safe and reliable operation but none more critical than that of a Pressure Relief Valve for a Transformer, an integral device that helps to protect against the effects of excess pressure buildup due to electrical faults, failures of insulation, and unforeseen operating conditions.

A properly functioning Pressure Relief Valve for Transformer will limit the potential for serious damage to transformer equipment, minimize the amount of downtime experienced as a result of peace of mind due to the level of safety offered by the transformer protection systems, and allow for increased operational safety. This article will provide a detailed overview of how the Pressure Relief Valve for Transformers functions, operation, importance, and various uses to provide industry with a better understanding of this important aspect of transformer protective systems.

Description of a Pressure Relief Valve for Transformer

A Pressure Relief Valve for Transformer is a safety device that functions by releasing excess internal pressure from inside the transformer tank whenever it is raised above the predetermined limit, thereby protecting against damage caused by excessive internal transformer tank pressure. When abnormal conditions occur (due to electrical faults) or short-circuits occur, the transformer can create gaseous materials very rapidly, thereby continually raising the internal pressure within the transformer tank.

This simple but very effective device provides excellent protection for expensive transformer assets and ensures the safe operation of transformers.

How does a transformer pressure relief valve work?

The Pressure Relief Valve for Transformer operates based on a pressure-sensitive mechanism. 

How It Works:

Transformers are vital components of the electric power system used to deliver electric power from one utility or industrial source to another. A fault within the transformer itself can result in significant physical damage to the transformer, costly downtime, and can even pose a risk to personnel. To protect transformers from these failures, the oil surge relay is engineered to detect rapid movement of the transformer oil caused by internal faults, such as short-circuits or insulation failures.

For power systems that are becoming more and more necessary to provide reliable and efficient electricity to customers, it is critical to have a high quality oil surge relay installed so that a transformer can perform at optimum levels and continue to provide an acceptable level of safety to both workers near the transformer and the utilities and industries they serve.

What is The Oil Surge Relay?

An oil surge relay is a protective device that detects rapid flows of transformer oil as a result of internal short-circuits, insulation failures and winding faults. Oil surge relays are usually mounted between the transformer tank and its conservator (gas tank for the transformer), typically in switching compartments where OLTC are installed.

There is an abrupt change in oil flow when there is a fault. The oil surge relay detects this unusual condition and immediately activates an alarm or tripping contacts, which isolates the transformer to minimize the risk of additional damages.

Due to its rapid response time, the oil surge relay is very effective at preventing catastrophic transformer failures.

Importance of Oil Surge Relay in Transformers

The transformers are a crucial component in power distribution systems, and their effective and safe operation depends on the effective performance of monitoring devices used in isolation. The most critical transformer accessories are the oil and water flow indicators, OTI/WTI, and porcelain support insulators.

These elements play an important part in ensuring that overheating, insulation failure, and downtime are avoided in the transformer.

In this blog, the reader will find an explanation regarding how these components are used in the transformer function, the applications for these components, as well as why it is significant to select a supplier for these components.

Oil and Water Flow Indicator - Functions and Applications

An oil and water flow indicator is used to detect the flow of cooling oil or water inside a transformer cooling system. Any appropriate flow of oil or water is crucial for maintaining the temperature of a transformer.

How does it work:  The flow indicator is placed in the cooling tube. This shows that there is an uninterrupted flow of oil or water as it passes through the system. This implies that the refrigerant is circulating; thus, any obstruction in the flow can be ascertained.

Application: Power and distribution transformers

Heat exchangers and cooling circuits

Industrial power systems

Utility Substation

Important Advantages: Ensures efficient transformer cooling

Early detection of faults in the cooling system

The risk of damage to the transformer is reduced

Easy visual monitoring with little maintenance required

Oil and water flow indicators are essential parts of keeping the transformers running reliably within the highly loaded industrial and utility arena.

OTI and WTI temperature indicators - Purpose and Benefits

Components such as porcelain support insulators play an essential role within the electric power industry, particularly concerning various components required for transformers, switchgear, and distribution lines, operated and maintained within an industry that deals with high-voltage equipment and components, a process that remains crucial for engineers and project planners across this industry sector.

In this guide, we will walk you through the key parameters you need, the important technical specifications, and the vital need for high-quality porcelain support insulators from a trusted supplier such as Dhruti Sales.

What is a Porcelain Support Insulator?

Porcelain support insulator is a ceramic insulator type used for mechanical support and insulation of conducting wires and high-voltage components. The insulator is made of good quality porcelain material and is capable of resisting moisture, mechanical, and electrical stresses for long periods of time.

Unlike other conventional grommets or ceramic insulators generally used as supports, support insulators are used for mechanical loading as well as insulation. The main function of porcelain support insulators is to support transformer parts, as well as bus ducts and other high voltage equipment.

Why are Standards Important for Porcelain Support Insulators?

Introduction to Voltage Regulation in Transformers

Having a constant voltage level is critical in ensuring the efficient running of electrical power systems. The conditions in the power transmission and distribution systems are dynamic, leading to changes in the voltage level. To tackle this change without affecting the power flow, a transformer has sophisticated voltage control systems. Circuit breakers in the transformer are a crucial part of these systems, enabling an On Load Tap Changer in Transformers in place. This makes the circuit breaker indispensable in the modern power sector, which focuses on having a constant power supply.

On Load Tap Changer In Transformers

On Load Tap Changer in a transformer is a mechanical system, which allows the voltage ratio in the Transformer to be changed when the Transformer is under load. In this technology, the Transformer is not de-energized because the tap change in the Transformer occurs when the Transformer is in its normal operational mode. On-load switch in a Transformer changes the number of turns in the Transformer.