Transformers are key elements in the electric power system, and their efficient functioning depends on uninterrupted observation and constant maintenance. Any alterations in the levels of oil, temperature, pressure, and working conditions can be evidence of emerging problems. Therefore, transformer monitoring devices become crucial for maintenance personnel in detecting abnormal situations timely.
Various devices are applied to monitor different characteristics of transformers. Knowing their functionality makes it easier for maintenance staff to choose the relevant devices and make a workable maintenance plan.
What are the Transformer Monitoring Devices?
Transformer monitoring devices can be defined as devices used for monitoring such crucial operating conditions of the transformer as oil level, temperature, pressure, gas specification, etc. Depending on the construction and purpose of the transformer, the devices can monitor one or several operating variables.
Constant monitoring means that maintenance personnel have a chance to notice nonstandard tendencies and analyze them in order to eliminate potential problems.
1 Magnetic Oil Level Gauge
The Magnetic Oil Level Gauge is an essential device designed to help keep track of oil levels in oil-filled transformers. The gauge is normally installed on the conservator in order to indicate the oil level outside of the transformer.
Inside the gauge, a floating mechanism pitches and rolls according to oil level variations. This movement is recorded using the magnetic mechanism and transferred to the indicator.
The Magnetic Oil Level Gauge is useful for revealing abnormal changes in oil levels due to different operational factors such as leaks and temperature. Dhruti Sales provides a range of MOG models such as SO-4, SO-6, SO-10 and ATMS for different applications.
2 Transformer Oil Temperature Monitoring Devices
Knowing the temperature of the transformer oil may reveal important operational features. The new Transformer Oil Temperature Monitoring Devices make it possible for maintenance teams to track the temperature levels of transformer oil and discover abnormal rises in temperature.
Oil temperature may change based on the conditions under which transformers operate. High temperatures can impose serious thermal stress on the entire transformer system and influence the functioning of the equipment.
The use of Transformer Oil Temperature Monitoring Devices enables operators to monitor temperature variations and to reason the unusual readings. Thus, regular monitoring of temperature is an essential aspect of machine maintenance.
3. Winding temperature indicator
Winding temperature indicates a degree of thermal state of a transformer. Winding temperature indicator assists maintenance personnel to monitor the temperature of transformer windings.
The considerable increase of winding temperature indicates either additional loading or either other conditions requiring fixing. Different readings of the winding temperature in combination with the oil temperature monitor allow one to gain a more complete understanding of working conditions of the transformer.
4. Buchholz relay
Buchholz relay is one of the important protecting and measuring devices that is used in many oil type transformers with conservators. It is located in the pipe which is in between the tank of the transformer and conservator.
The device contains all the necessary tools to react on the formation of gas and to fast movement of oil in the transformer connected with some internal problems.
According to the situation that occurs, Buchholz relay can either raise the alarm and provide notifications or take measures straight away.
In conclusion, the importance of regular inspections of Buchholz relay helps in monitoring and protecting suitable transformer installations.
5. Pressure Relief Device
Internal pressure is a vital factor when it comes to transformers functioning. A Pressure Relief Device is a piece of equipment that opens up the tank in case of excess pressure.
Excessive internal pressure can appear due to some internal malfunctions or other extraordinary situations. Quick relief of the pressure helps avoid excessive mechanical stress on a transformer tank. It is necessary for maintenance teams to check the Pressure Relief Device every now and again to make sure it works properly.
6. Oil Pressure and Vacuum Monitoring Devices
Depending on the design and suitable application of transformers, pressure and vacuum need to be supervised. Oil Pressure and Vacuum Monitoring devices are able to detect unusual pressures inside proper transformer systems.
Alterations in pressure or vacuum are caused by operating conditions, temperatures, sealing problems, or other equipment conditions. The monitoring of these values can allow maintenance teams to find some abnormalities in advance.
It is important to choose the correct Oil Pressure and Vacuum monitoring devices according to the manufacturer’s requirements.
7. Devices for Conservator Monitoring
The conservator is very relevant in maintaining oil level in many transformers filled with oil. The oil-filled transformers require expansion and contraction of oil due to temperature changes, and it is the conservator that tackles this issue.
Devices for conservator monitoring greatly assist maintenance staff in observing the status of the conservator. The oil level indicator situated in it is very important because there can be a negative result due to high or low level of oil.
A Magnetic Oil Level Gauge is usually employed to visually indicate the oil level useful for conservator monitoring. Therefore, it is possible to select proper conservator monitoring devices to ease the process of performing regular checks on transformer equipment.
8. Something About Transformer Oil Level Indicators
It is very useful for maintenance personnel to see a good oil level indicator. The oil level indicator is beneficial during regular inspection as a significant change can be detected before getting to the tank.
A good oil level indicator should be compatible with an oil-filling transformer. For instance, a Magnetic Oil Level Gauge is an oil level indicator with external indications of oil level through a pointer and dial.
Using instruments for Transformer Oil Level Measurement can help with preventive maintenance and early detection of potential oil issues.
Importance of Transformer Monitoring Instruments
There are a number of benefits that can be obtained from the use of proper transformer monitoring instruments:
Assistance in detecting abnormal working situations
Provision of assistance in preventive maintenance
Improvement of routine inspection
Reduction of unexpected downtimes
Early detection of problems
Support of safer operations
However, people should understand that monitoring instruments cannot replace professionals for transformer inspection. Any strange readings have to be analyzed according to proper maintenance procedures.
Selection of Correct Monitoring Instruments
It is important to choose the right monitoring instruments based on many factors (transformer rating, transformer design, type of construction, conservator design, environmental conditions, monitoring requirements, and alarms).
