In order to determine how much insulating oil is contained within the transformer tank, an essential component known as a Magnetic Oil Gauge is utilized in these devices. Insulating oil is used in transformers because it helps to dissipate heat that is produced while the device is operating and provides insulation between the the windings & the tank. In order to keep the transformer in good working order and protect it from any possible harm, the oil level must be kept at a constant level that falls within a certain range. A float, an orientation tube, plus a visual indicator are the three components that make up the Magnetic Oil Gauge. It is intended for the float to remain afloat on the top of the oil that is contained within the tank, hence it is often constructed out of something that is lightweight such as cork or plastic. The float will move in a manner that is proportional to the change in the oil level. The float is attached to the guide tube, which is positioned in a vertical orientation inside the transformer tank. The oil level acts as a guide, causing the float to rise and fall vertically within the guide tube. The float will always be properly aligned to the oil level thanks to the guide tube, which also stops any unwanted movement from occurring.
The MOG, or magnetic oil gauge, is a device that allows us to monitor the amount of liquid or oil contained within the tank or reservoir of a power transformer. Additionally, it provides us with an alert low oil levels indication with the use of a mercury switch. It is attached to the base of the conservation tank that is depicted in the illustration.The MOG’s construction as well as its operation are detailed here. The magnet that makes up the MOG is located inside the conservator drives, whereas the magnet that makes up the power transformer is positioned and fixed outside the conservator tank. As a result of its connection to the float, the driving magnet is able to rotate and, as a result, acquire a position that is proportional to the height of the oil level. The float has a hinge so that it can move up and down in response to changes in the oil level. Because of the bevel gear, the driving magnet will revolve either in a clockwise or counterclockwise direction depending on whether this rise or fall occurs. A pointer and a cam are housed within the follower magnet. The pointer provides a reading of the oil level, and the cam is adjusted to activate the switch at a certain low level.
The positions Empty, 14, 12, 34, and Full correspond to the MOG dial’s standard calibration. After leaving a distance of 65 millimeters between the bottom and top of the conservator, the marks for empty and full are calibrated. This is done to prevent the float from impacting the wall of the conservator.Indicator can be mounted in inclined position towards ground (max 300C) for easier viewing by fastening mounting pad at chosen angle, or the indicator can be mounted by retaining dial and mounting pads in vertical position. Both mounting options are described further in the following paragraphs. It is possible to customize the location of the indication on the surface to correspond with the specific conditions of the site.
The visual indication is attached to the guide tube and is often positioned outside of the transformer tank. By displaying markings or measurements, it offers a representation of the oil level that can be seen with the naked eye. Operators are able to detect whether or not the oil level is within the acceptable range by monitoring where the indicator is positioned. Magnetic Oil Gauges are widely utilized as a reliable and straightforward means of monitoring oil levels due to their widespread availability. They do not depend on any external power source and do not require any complicated electronic systems, which enables them to be inexpensive and simple to set up. In addition, their operation is unaffected by either electrical failures or power outages, which ensures that monitoring will proceed uninterruptedly. For proper maintenance and operation of the transformer, it is essential to monitor the oil level on a regular basis. A level of oil that is too low can result in inadequate insulation and overheating, while a level of oil that is too high can result in oil leakage and a reduction in the effectiveness of the cooling system. Operators are able to quickly spot any deviations from the ideal oil level when they make use of a Magnetic Oil Gauge. This enables them to take the appropriate steps, such as adding or draining oil, to ensure that the transformer continues to function at an optimal level.
In conclusion, a Magnetic Oil Gauge is an essential component in transformers that enables the monitoring of insulating oil levels. This component can be found in most large electronics stores. A float, a guide tube, and a visual indicator are included in its construction. This gauge provides operators with the opportunity to guarantee that the transformer runs within the prescribed oil level range, which contributes to the dependability and durability of the transformer. The oil level is properly indicated by the gauge.