What is function of Oltc in transformer?
On-load tap changer (OLTC), also known as On-circuit tap changer (OCTC), is a tap changer in applications where a supply interruption during a tap change is unacceptable, the transformer is often fitted with a more expensive and complex on load tap changing mechanism.
Which oil is used in power transformers?
Naphthenic mineral oil
Naphthenic mineral oil has long been the most preferred insulating liquid for power transformer insulation because it has a good pouring point at low temperatures, good thermal cooling capacity, low cost, high efficiency and availability on the transformers market [1, 2, 3, 7].
What is Oltc diverter switch?
Diverter switches of OLTC perform switch over operation between the taps of the transformer, in which they are embedded at a leap. Speeds reached during this process are very high.
What is uninhibited transformer oil?
Transformer Oil Uninhibited is a highly refined, efficient performance uninhibited transformer oil, providing high dielectric strength and reliable low temperature performance. It is formulated with a mineral base stock and provides good oxidation stability.
What is the use of Oltc and RTCC in transformer?
RTCC panel used to control the transformer output voltage by controlling the OLTC unit of the transformer. As we know the OLTC (On Load Tap Changer) is responsible to change the transformer output voltage. OLTC controls the winding tap position of the Transformer and it resulted in the output voltage also changes.
What is an on-load tap changing transformer (OLTC)?
Definition: An On-Load Tap Changing Transformer (OLTC) consists of an open load tap changer, it is also known as an on-circuit tap changer (OCTC). They are used in areas where there is an interruption in the power supply due to an unacceptable tap change. The ratio of the number of turns can be changed without breaking the circuit.
What is the function of resistor in OLTC transformer?
The main objective of using a resistor in the OLTC transformer is to maintain the voltage by controlling the flow of current using switches. It provides adjustment of voltage magnitude and flow of reactive. Less reliability. Electrical power transformers. 1). What is on load and offload tap changer?
What type of transformer oil is used in Transformers?
There are two main types of transformer oil used in transformers: Naphtha oil is more easily oxidized than paraffin oil. But the product of oxidation – i.e. sludge – in the naphtha oil is more soluble than the sludge from the paraffin oil.
What is the dielectric strength of transformer oil?
Dielectric Strength of Transformer Oil. The dielectric strength of transformer oil is also known as the breakdown voltage (BDV) of transformer oil. Breakdown voltage is measured by observing at what voltage, sparking strands between two electrodes immersed in the oil, separated by a specific gap.