The Conservator Tank of the Transformer
A conservator tank is a cylindrical or rectangular tank mounted on top of an oil-filled transformer. The purpose of the conservator tank is to provide a space for the expansion and contraction of the transformer oil due to changes in temperature.
The conservator tank is usually connected to the transformer's main tank by a pipe that allows the oil to flow between the two tanks.
Working Principle of Conservator Tank
The working principle of a conservator tank is quite simple. The conservator tank is connected to the transformer's main tank by a pipe which allows the oil to flow freely between the two tanks.
The conservator tank is partially filled with oil, a flexible diaphragm or bladder.it is installed inside the tank to separate the oil from the air.
When Temperature Increase
As the temperature of the transformer increases the level of oil in the main tank rises. As a result, some of the oil from the main tank flows into the conservator tank.
it compresses the air inside the tank. This expansion of the air inside the conservator tank helps to maintain constant pressure inside the transformer. It prevents the build-up of excessive force that can cause damage to the transformer.
When Temperature Decrease
As the temperature of the transformer decreases the oil contracts. As a result, some of the oil from the conservator tank flows back into the main tank. it causes the air inside the conservator tank to expand.
This contraction of the oil inside the transformer is compensated by the oil flowing into the main tank.
Construction of Conservator Tank
A conservator tank is made of mild steel or stainless steel. it has a cylindrical or rectangular shape. The tank is mounted on top of the transformer.it is connected to the main tank by a pipe or conduit that allows the oil to flow freely between the two tanks.
The conservator tank is partially filled with transformer oil, and a flexible diaphragm or bladder is installed inside the tank to separate the oil from the air.
Parts Of the Conservator Tank Of Transformer
The basic components of a standard conservator tank include
- Tank Body
- Diaphragm or Bladder
- Inlet and Outlet Fittings
- Breather
- Level Gauge
Tank Body
The tank body is usually made of mild steel or stainless steel and is designed to withstand the pressure and weight of the oil and the diaphragm or bladder. The tank may have a cylindrical or rectangular shape depending on the design of the transformer.
Diaphragm or Bladder
The diaphragm or bladder is installed inside the conservator tank and separates the oil from the air. The diaphragm or bladder is made of a flexible material that can expand and contract with changes in the oil level.
Inlet and Outlet Fittings
The inlet and outlet fittings are located at the bottom of the conservator tank. They are used to connect the tank to the main tank of the transformer. The inlet fitting allows the oil to flow from the main tank to the conservator tank, while the outlet fitting allows the oil to flow back from the conservator tank to the main tank.
Breather
The breather is a device that is installed on the top of the conservator tank. it allows the air to enter and exit the tank as the oil level changes. The breather is equipped with a filter that prevents the ingress of moisture and other contaminants into the transformer oil.
Level Gauge
The level gauge is a device that is used to measure the oil level in the conservator tank. The level gauge may be mechanical or electronic and is used to ensure that the oil level in the tank is within the specified range.
Types of Level Gauges
At the transformer level gauges are used to monitor the liquid level of the insulating oil in the transformer tank.
- Float-type Level Gauges
- Capacitive Level Gauges
- Radar Level Gauges
- Ultrasonic Level Gauges
- Electromagnetic Level Gauges
- Hydrostatic Level Gauges
- Visual Level Gauges
- Nuclear Level Gauges
- Vibrating Wire Level Gauges
Types of conservator tanks Of Transformer
There are several types of conservator tanks used in transformers, which are
- Standard Conservator Tank
- Buchholz Relay Conservator Tank
- Corrugated Conservator Tank
- Modular Conservator Tank
Standard Conservator Tank
This is the most common type of conservator tank used in transformers. It is a cylindrical or rectangular tank that is mounted on top of the transformer. it is partially filled with oil. A flexible diaphragm or bladder is installed inside the tank to separate the oil from the air.
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| standard conservator tank |
Buchholz Relay Conservator Tank
This type of conservator tank is used in transformers equipped with a Buchholz relay. The Buchholz relay is a protective device that detects gas or oil accumulation in the transformer. when a fault occurs it triggers an alarm or trips the transformer.
The Buchholz relay conservator tank is similar to the standard conservator tank.
Corrugated Conservator Tank
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| Corrugated Steel |
This type of conservator tank is used in transformers where high mechanical vibration levels. It has a cylindrical or rectangular shape. The tank's walls are made of corrugated steel or aluminium.
Modular Conservator Tank
This type of conservator tank is used in remote locations. The modular conservator tank is made of multiple sections or modules that can be assembled on-site to form a complete tank.
The modular design makes it easier to transport and install the transformer in rugged terrain or remote locations.
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| Modular Conservator Tank |
Atmoseal type conservator
Atmoseal type conservator is a type of conservator tank used in transformers.it is designed to prevent the ingress of air and moisture into the transformer oil.
The Atmoseal type conservator tank is similar to the standard conservator tank, but it has a sealed design that isolates the transformer oil from the atmosphere.
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| Atmoseal Conservator |
The Atmoseal type conservator tank is commonly used in high-voltage transformers, where the risk of oil contamination and maintenance requirements are critical factors.
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