What is function of Oltc in transformer?
There are two types of transformer tap changers: an on-load tap changer (OLTC) and a deenergised tap changer (DETC). An OLTC varies the transformer ratio while the transformer is energized and carrying load. The switching principle uses the “make before break” contact concept.
What is Oltc and Rtcc?
RTCC stands for Remote Tap Changer Control. 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 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. It was developed in LabVIEW environment and can be used for every diverter switch with proper coupling elements.
Why is tapping necessary?
It is therefore essential to tap the HV windings which is advantageous in a step-down transformer. Tap changing causes changes in leakage reactance, core loss, I2R loss and perhaps some problems in parallel operation of dissimilar transformers.
Why tap changer is connected on the HV side?
on HV side voltage is high but current is less but in the LV side voltage is less and current is high. If we connect Tap changer on the LV side then sparking will take place. The HV winding generally wound over LV winding hence it is easier to access the HV winding turns instead of LV winding.
What is a Rtcc?
The Real Time Crime Center (RTCC) is a centralized technology utilized by law enforcement and emergency first responders.
What is a Rtcc panel?
REMOTE TAP CHANGER CONTROL PANEL RTCC is “Remote Tap Changer Control “which is a Programmable device to control the output of the transformer through OLTC unit fitted in the transformer through control cables.
Why is Oltc used?
A transformer consists of two types of windings primary windings and secondary windings. Whereas on-load tap changer transformer there will be continuous power supply even when tap positions change. The main advantage of OLTC is that is can operate without disconnecting. They are mainly used in power transformer.
What is a Tcul transformer?
Voltage regulators do just what their name implies, regulate the voltage. If voltage is to be regulated in the substation, the most economical method is with tap changing under load (TCUL), sometimes referred to as LTC or load tap changing, built into the transformer. …
Why Oltc is used in HV side?
The tap changer is placed on high voltage side because: Because of high voltage the current through the HV winding is less compared to LV windings, hence there is less “wear” on the tap changer contacts. Due this low current, in on load tap changer the change over spark will be less.
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.
Which is better off load or on load transformer?
In off load tap changer transformer, the main supply connection is disconnected while changing the tap. Whereas on-load tap changer transformer there will be continuous power supply even when tap positions change. The main advantage of OLTC is that is can operate without disconnecting. They are mainly used in power transformer.
Is there a no load tap changer transformer?
This mechanism can be done automatically in two ways, one way is no load tap-changing transformer (NLTC), and another way is (OLTC) On-LoadTap Changing Transformer. This article briefs about OLTC. In off load tap changer transformer, the main supply connection is disconnected while changing the tap.
How do you change the selector switch on a transformer?
The transformer enters into the operating stage when the diverter switch is closed and the selector switch1 is closed. Now if we want to change the selector switch from 1 to 2 then this can be done by adjusting the tap, by following the below steps. Step1: Firstly open the diverter switch, which indicates no current flows through selector switches
