Withstand voltages ......................................................................................................... 23
VUCG with tap selector C ......................................................................................... 23
VUCG with tap selector III unshielded version ............................................................ 23
VUCG with tap selector III shielded version ................................................................ 24
VUCG with tap selector F .......................................................................................... 24
VUCL with tap selector III unshielded version............................................................. 25
VUCL with tap selector III shielded version ................................................................ 25
Short-circuit current strength .......................................................................................... 26
VUCL with tap selector F ........................................................................................... 26
Highest phase service voltage across the regulating winding .......................................... 27
Rated through-current .................................................................................................... 27
Occasional overloading ................................................................................................... 27
Oil temperature ............................................................................................................... 27
Alternative insulating liquids............................................................................................. 27
Coarse/fine regulation leakage inductance switching ....................................................... 28
Tie-in resistor and tie-in resistor switch ........................................................................... 28
Installation and maintenance ................................................................................................. 30
Tap-changer ................................................................................................................... 30
Installation ................................................................................................................. 30
Drying ....................................................................................................................... 30
Weights ..................................................................................................................... 30
Oil filling .................................................................................................................... 31
Maintenance ............................................................................................................. 31
Pressure .................................................................................................................... 31
Accessories and protection devices ................................................................................ 31
Motor-drive mechanism .................................................................................................. 31
Design ....................................................................................................................... 31
Installation ................................................................................................................. 31
Maintenance ............................................................................................................. 31
Operating shafts ........................................................................................................ 31
Dimensions ........................................................................................................................... 33
Dimensions, type VUCG ................................................................................................. 33
Type VUCG.E and VUCG.N with tap selector type C and cover mounting ................. 34
Type VUCG.E and VUCG.N with tap selector III and with tie-in resistor switch ........... 35
Type VUCG.E and VUCG.N with tap selector F and with tie-in resistor switch ............ 36
Type VUCG.R and VUCG.B with tap selector F and with tie-in resistor switch ........... 37
Dimensions, type VUCL .................................................................................................. 38
Type VUCL.E and VUCL.N with tap selector III and with tie-in resistor switch ............. 39
Type VUCL.B with tap selector III and with tie-in resistor switch ................................. 40
Type VUCL.E and VUCL.N with tap selector F and with tie-in resistor switch ............. 41
Type VUCL.B with tap selector F and with tie-in resistor switch ................................. 42
Motor-drive mechanisms ........................................................................................... 43
Oil conservator ................................................................................................................ 44
Appendices: Single-phase diagrams ..................................................................................... 45
Appendix 1: Single-phase diagrams for VUCG/C ............................................................ 45
Appendix 2: Single-phase diagrams for VUCG/III and VUCL/III ........................................ 51
Appendix 3: Single-phase diagrams for VUCG/F and VUCL/F ......................................... 58
