ABB VUCG.N - Type VUCG.E and VUCG.N with Tap Selector F and with Tie-In Resistor Switch

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36 Technical guide VUC | 1ZSC000562-AAX en, Rev. 1

Fig. 52. Dimensions, type VUCG.E with tap selector F and with tie-in resistor switch.

Type VUCG.E with tap selector F and with tie-in resistor switch

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Table of Contents4
Design Principles6
On-Load Tap-Changer (OLTC)6
Diverter Switches8
Diverter Switch Housing and Top Section10
Painting11
Operating Mechanism11
Transition Resistors11
Special Applications, Load Conditions, and Environments11
Insulating Liquids11
Special Designs11
Motor-Drive Mechanism11
Accessories11
Tap-Changer Principles of Operation12
Switching Sequence, VUCG12
Switching Sequence, VUCL14
Type of Regulation16
Linear Switching (Type L)16
Change-Over Selector for Plus/Minus Switching (Type R)16
Change-Over Selector for Coarse/Fine Switching (Type D)16
Type of Connection17
Three-Phase Neutral Point (N)17
Single-Phase (E)17
Three-Phase Delta (B)17
Three-Phase Fully Insulated, Delta (T)17
Three-Phase Fully Insulated, Auto Transformer (T)17
Tap-Changer Characteristics and Technical Data18
Type Designation18
Type of Tap-Changer18
Type of Regulation18
Type of Connection18
Impulse Withstand Voltage to Earth18
Maximum Rated Through-Current18
Tap Selector Size18
Tap Selector Shielding18
Diverter Switches19
Tap Selectors19
Possible Combinations of Diverter Switches and Tap Selectors19
Maximum Number of Positions19
Enforced Current Splitting19
During Operation19
Rated Phase Step Voltage20
Coarse Fine Regulation Leakage Inductance Switching21
Contact Life21
Standards and Testing21
Rating Plate21
Insulation Levels22
Withstand Voltages23
VUCG with Tap Selector C23
VUCG with Tap Selector III Unshielded Version23
VUCG with Tap Selector III Shielded Version24
VUCG with Tap Selector F24
VUCL with Tap Selector III Unshielded Version25
VUCL with Tap Selector III Shielded Version25
Short-Circuit Current Strength26
VUCL with Tap Selector F26
Highest Phase Service Voltage Across the Regulating Winding27
Rated Through-Current27
Occasional Overloading27
Oil Temperature27
Alternative Insulating Liquids27
Coarse/Fine Regulation Leakage Inductance Switching28
Tie-In Resistor and Tie-In Resistor Switch28
Installation and Maintenance30
Tap-Changer30
Installation30
Drying30
Weights30
Oil Filling31
Maintenance31
Pressure31
Accessories and Protection Devices31
Motor-Drive Mechanism31
Design31
Installation31
Operating Shafts31
Dimensions33
Dimensions, Type VUCG33
Type VUCG.E and VUCG.N with Tap Selector Type C and Cover Mounting34
Type VUCG.E and VUCG.N with Tap Selector III and with Tie-In Resistor Switch35
Type VUCG.E and VUCG.N with Tap Selector F and with Tie-In Resistor Switch36
Type VUCG.R and VUCG.B with Tap Selector F and with Tie-In Resistor Switch37
Dimensions, Type VUCL38
Type VUCL.E and VUCL.N with Tap Selector III and with Tie-In Resistor Switch39
Type VUCL.B with Tap Selector III and with Tie-In Resistor Switch40
Type VUCL.E and VUCL.N with Tap Selector F and with Tie-In Resistor Switch41
Type VUCL.B with Tap Selector F and with Tie-In Resistor Switch42
Motor-Drive Mechanisms43
Oil Conservator44
Appendices: Single-Phase Diagrams45
Appendix 1: Single-Phase Diagrams for VUCG/C45
Appendix 2: Single-Phase Diagrams for VUCG/III and VUCL/III51
Appendix 3: Single-Phase Diagrams for VUCG/F and VUCL/F58

ABB VUCG.N - Type VUCG.E and VUCG.N with Tap Selector F and with Tie-In Resistor Switch

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