RTCC means relay tap changer circuit,these are the relays
which give command to the tap changer present in the
transformer H.T side to either increse or decrese the tap
since due to inductive load ( lagging p.f ) , the secondary
terminal voltage would decrease which would not be good for
the loads so by chnging taps, we increase the primary
voltage which in turn changes the secondary
voltage,normally done online.
RTCC panel is called as the Remote Tap Changer Circuit. it
is used to control the OLTC Tap changer from the control
room or control point itself where RTCC panel is Placed. it
is used to get the stable output voltage.
RTCC MEANS REMOTE TAP CHANGING CIRCUIT. AND REQUIRED FOR
CHANGING THE TAP AT THE HV SIDE OF THE TRANSFORMER ONLINE
IF THE LV SIDE VOLTAGE OF THE TRANSFORMER FLUCTUATE
BEACAUSE OF LOAD. IT HAS AVR (AUTOMATIC VOLTAGE REGULATOR)
TO CONTROL THE TAP CHANGING.
Rtcc is remote tap changer circuit. It is used to change tap position as per requirement of load. It generally maintains voltage at specific value, if there is any change in voltage rtcc gets it at reqd value.