Gassing of insulating oil is a common occurrence in an operating transformer. However, each gas has a story to tell. In terms of risk, each gas has a personality. The oil (a complex hydrocarbon), when stressed with heat or electrical activity will break down into simpler gases. These are also known as hydrogen, carbon monoxide, […]
When is it appropriate to apply online dissolved gas analysis monitoring (DGA)? It depends on the risk. In this TechTalk we will explore how to decide whether or not to apply online DGA.
Transformers are an expensive purchase. Most asset owners want the most of the transformer asset (the best return on investment). Condition monitoring is an essential tool to achieve this. The results give us an indication of the health of the unit, and that something is wrong internally and also to some degree the ageing of […]
In any condition monitoring instance, one needs to be able to trust the data! In all cases, the measurement or the taking of data is the beginning of the process. If this is not done correctly it can distort the data and result in incorrect decisions being made.
Transformers are commonly manufactured using cellulosic-based insulation materials which have an affinity for absorbing moisture – it’s in their DNA … Furthermore, mineral oil (specifically) is severely impacted by moisture which will significantly reduce dielectric strength. Moisture can be present in either a dissolved or free-suspension state. Both conditions will have disastrous effects on the […]
Researching the advantages of cast resin transformers, you may find the information available to be somewhat lacking. Many resin cast transformer companies mention that these transformers only need air to cool, due to its smooth coil surface eliminates heavy dirt build-up.