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On-load tap changers type VUCG

The VUC types of on-load tap changers come in a range of models with ratings suitable for most applications. They are mounted inside of the transformer tank, suspended from the transformer cover. The VUC types operate with arc quenching in vacuum interrupters.

The VUC types complete the UC family of tap changers, with their excellent service record since the 1960’s.

The VUCG is the smaller of the VUC types and is suitable for transformers up to 800 MVA with a BIL rating of 1050 kV and current rating of 1800 A.

Product scope

  • Base technology: Vacuum, resistance, in-tank, diverter switch
  • Common applications: Network, special, industrial, HVDC
  Tap-changer placed in the neutral point of the winding Other placements of the tap-changer
Highest voltage for equipment (Um) 300 kV 300 kV
Max lightning impulse (BIL) 1050 kV 1050 kV
Max current
3-phase
1-phase (one tap-changer/phase)		 800 A
1800 A		 N.A.
1800 A
Enforced current splitting
1-phase (one tap-changer/phase)		 N.A. N.A.
Max step voltage 3500 V 3500 V

Why Hitachi Energy?

  • Plug-and-play interchangeability with traditional type UCG only requires diverter switch replacement
  • Redundant switching capacity in the auxiliary contact system
  • Maintenance in any tap position and without dismantling the shaft system, thus eliminating the risk for failure from improper assembly or alignment
  • Possible to use alternative insulating fluids

Get to know more

Document title ID
Technical guide 1ZSC000562-AAX
Declaration of conformity 1ZSC000498-ABN
Ordering data form (.xlsm format)
Please note that this is an interactive form, which can be filled in, saved and sent to us by e-mail.		 1ZSC000498-ACC
Ordering data form explanations 1ZSC000498-AAP
Installation and commissioning guide 1ZSC000562-AAY
User's guide 1ZSC000562-ABE
   
Accessories and protection devices 1ZSC000562-AAD
Oil filter unit, type HPS 27/27, 54 1ZSC000562-AAF
Oil filter unit, type OLU 1ZSC000562-AAR

Insulating level (kV) Selector Switching type Connection Max. rated through-current (A) Number of positions Available versions Drawing number 
380
650
750
1050		 C L N 450-600 5-18 - 1ZSC004882-ABH 
E, T, B11) - 1ZSC004882-AAU
E, T 700-1200 - 1ZSC004882-AAV
>1200-1500 - 1ZSC004882-ABF
B21) 450-600 - 1ZSC004882-AAY
R N 450-600 8-15 - 1ZSC004882-AAZ
16-35 - 1ZSC004882-ABA
E, T, B11) 8-15 - 1ZSC004882-ABB
16-35 - 1ZSC004882-ABC
E, T 700-1200 8-15 - 1ZSC004882-ABD
16-35 - 1ZSC004882-ABE
>1200-1500 8-15  - 1ZSC004882-ABG
16-35 - 1ZSC004882-ABL
B21) 450-600 8-15 - 1ZSC004882-AAT
16-35 - 1ZSC004882-AAH
D N 450-600 8-15 - 1ZSC004882-AAB
16-35 - 1ZSC004882-AAC
E, T, B11) 8-15 - 1ZSC004882-AAD
16-35 - 1ZSC004882-AAE
E, T 700-1200 8-15 - 1ZSC004882-AAF
16-35 - 1ZSC004882-AAG
>1200-1500 8-15 - 1ZSC004882-ABJ
16-35 - 1ZSC004882-ABK
B21) 450-600 8-15 - 1ZSC004882-AAM
16-35 - 1ZSC004882-AAN
1) B1 (1 phase) and B2 (2 phases) are combined components, forming the "B-group".

Insulating level (kV) Selector Switching type Connection Max. rated through-current (A) Number of positions Available versions Drawing number 
380
650
750
1050		 III L N 450-800 5-22 700 A: long
800 A: long
For N. and B.		 1ZSC004912-AAA 
E, T, B11) 1ZSC004912-AAB
B21) 1ZSC004912-AAF
E, T >800-1000 1ZSC004912-AAV
>1000-1800 1ZSC004912-AAX
R, D N 450-800 9, 13 1ZSC004912-AAG
11, 15-19, 21-23, 25-27, 29-31, 33-35 1ZSC004912-AAH
E, T, B11) 9, 13 1ZSC004912-AAJ
11, 15-19, 21-23, 25-27, 29-31, 33-35 1ZSC004912-AAK
B21) 9, 13 1ZSC004912-AAT
11, 15-19, 21-23, 25-27, 29-31, 33-35 1ZSC004912-AAU
E, T >800-1000
 9, 13 - 1ZSC004912-ABA
11, 15-19, 21-23, 25-27, 29-31, 33-35 - 1ZSC004912-AAY
>1000-1800 9, 13 - 1ZSC004912-ABB
11, 15-19, 21-23, 25-27, 29-31, 33-35 - 1ZSC004912-AAZ
1) B1 (1 phase) and B2 (2 phases) are combined components, forming the "B-group".

Insulating level (kV) Selector Switching type Connection Max. rated through-current (A) Number of positions Available versions Drawing number 
380
650
750
1050		 F L N 450-800 5-18 700 A: long
800 A: long
For .N and .B		 1ZSC026120-AAA 
B11) 1ZSC026120-AAB
B21) 1ZSC026120-AAD
E, T 0-1800 - 1ZSC026120-AAB
R, D N 450-800 8-9, 12-13 700 A: long
800 A: long
For .N and .B		 1ZSC026120-AAE
10-11, 14-35 1ZSC026120-AAF
B11) 8-9, 12-13 1ZSC026120-AAG
10-11, 14-35 1ZSC026120-AAH
E, T 0-1800 8-9, 12-13 1ZSC026120-AAG
10-11, 14-35 1ZSC026120-AAH
B21) 450-800 8-9, 12-13 1ZSC026120-AAL
10-11, 14-35 1ZSC026120-AAM
1) B1 (1 phase) and B2 (2 phases) are combined components, forming the "B-group".

The drawing shows Drawing number
Mounting on active part 5492 0103-1
Accessories placement: Standard top section without oil filter unit 5492 0103-2
Accessories placement: Top section for oil filter unit 5492 0103-3
Accessories placement: Top section with temperature switch 5492 0103-5
Accessories placement: Top section with two valves R1"
 5492 0103-4
Accessories placement: Top section with two valves R1" and oil filter unit 5492 0103-7
Drain valve 5492 0083-10
Pressure relief device - flow diameter 130 mm - Qualitrol 5492 0083-15
Pressure relief device - flow diameter 50 mm, standard - Comem 1ZSC003721-AAW
Pressure relief device - flow diameter 50 mm, class C5M-H - Comem 1ZSC003721-AAV
Bevel gear (on top section, T-shape) 5492 0083-19
Bevel gear (on top section, L-shape) 1ZSC004021-AAD
Bevel gear (in external drive shaft system) 5492 0083-1
Support for bevel gear (on external drive shaft system) 5492 999-11
Pressure relay 5492 0083-2
Oil flow relay 1ZSC003527-ABB
External drive shaft system 5492 0083-4
Temperature relay 1ZSC003716-AAM
Temperature sensor 1ZSC005333-AAF
Temperature sensor and pressure relay 5492 0083-33
Thermo switch housing 5492 0083-22

Movie title ID
Tap-changers by ABB: Based on traditions - geared for change 1ZSC000717-AAM
Vacuum - a logical progression: Advantages of the VUCG on-load tap-changer 1ZSC000717-AAT
Life cycle support: Training centers 1ZSC000717-ABD
Vacuum - a logical progression: Upgrading made as easy as 1 - 2 - 3 1ZSC000717-ABE
Synthetic test circuit: The value of experience 1ZSC000717-ABX
It's all about commitment: Life cycle support 1ZSC000717-ACX

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