Transformer bushings are a critical part. Load Tap Changer (40%) and Winding (14%) are the two other leading causes of transformer failure, according to the CIGRE WG-12 Report from 1983. (35%).

In comparison to OIP transformer bushings, the following are the benefits of using RIP transformer bushings during installation:

An insulating envelope can be attached to a RIP bushing. The empty area can be filled up with the help of an insulating material like polyurethane foam, gel, etc., or insulating liquid.

RIP bushings have a Tan delta value of 0.35% or less. OIP bushings, on the other hand, typically have a tan delta value of 0.45% or lower.

OIP transformer bushings, on the other hand, are more susceptible to lightning strikes and other conditions that could lead to an explosive failure. Additionally, overfilling horizontally mounted oil reservoirs might cause serious operating issues.

Compared to OIP transformer bushings, the RIP transformer bushings require fewer maintenance checks because they are free of oil and porcelain.

A RIP bushing is classified under Class-E (that ranges up to 120 degrees C) by IEC standard 60137, but an OIP bushing is classified under Class-A (that ranges upto 105 degrees C).

The two most common varieties of transformer bushings are the subject of this essay. Specifically, the contrast between oil-impregnated and resin-impregnated bushings.

To meet the requirements of IEEE 693-2005 standards, standard RIP transformer bushings types demonstrate high seismic performance. OIP transformer bushings, on the other hand, have very poor seismic and withstand capabilities.

Porcelain or some other form of insulation surrounds the core, and a similar insulating liquid to that used to seal the impregnation cavity fills that gap in between the two.

The Partial Discharge level in RIP transformer bushings is typically less than 2 PC. On the other hand, partial discharge is less than 5 PC in OIP transformer bushings.

OIP bushing technology differs significantly from RIP bushing technology in that the condenser cores in OIP technology are impregnated with transformer-grade mineral oil, which remains liquid throughout the life of the bushing, whereas curable epoxy resin is used in RIP bushings to impregnate the resin and form a solid condenser.

Non-flammable RIP transformer bushings are constructed without insulating oil. Because of this, it's a non-explosive bushing.

Insulation failure or arcing is a major concern with OIP transformer bushings, which increase the risk of an explosion. Due to the fragile nature of the outside porcelain envelope, the arcing might cause a large explosion.

In transformer bushings made of RIP, the main insulation is a core coiled from paper that has then been impregnated with epoxy resin. This insulation's casting and curing processes are meticulously controlled.

An oil level indicator and a test tap are included with every set of bushings. The overhead conductor and transformer winding are connected by a central stem that is usually constructed of copper.

There are two basic varieties of EHV class bushings, each distinguished by a different combination of material, manufacturing process, and aesthetics:

Porcelain OIP transformer bushings weigh approximately half as much as composite RIP transformer bushings. Because of this, the handling, transportation, and installation of RIP bushings are made easier.

Insulates the wire from the grounded transformer tank with an electrical bushing, allowing many conductors to flow through simultaneously.

It's usually observed that RIP transformer bushings have lower Partial Discharge levels compared to OIP transformer bushings.

RIP transformer bushings, a brand-new class of insulating material with improved thermal and electrical performance, have recently been created.

In the classic OIP transformer bushings technology, oil is used as the primary insulating medium for transformer bushings.