The UBB is a selector switch type of on-load tap-changer. It is designed for mounting inside of the transformer tank, but many of the features and benefits our customers appreciate from our UZ on-tank technology. This combination of the best qualities from both types of tap-changer makes the UBB model unique in its design and operation. Primarily designed for the small and medium sized transformer, the unit is compact and cost effective compared to equivalent diverter switch types of tap-changers.
On-load tap-changers type UBB
Product scope
- Base technology: Conventional, resistance, in-tank, selector switch
- Common applications: Network, special
| Tap-changer placed in the neutral point of the winding | Other placements of the tap-changer | |
|---|---|---|
| Highest voltage for equipment (Um) | 76 kV | 76 kV |
| Max lightning impulse (BIL) | 350 kV | 350 kV |
| Max current 3-phase 1-phase (one tap-changer/phase) |
500 A 500 A |
500 A 500 A |
| Max step voltage | 1500 V | 1500 V |
Why Hitachi ABB Power Grids?
- Compact size reduces overall space requirements in transformer to ensure cost effective solutions
- Simplistic, reliable design philosophy ensures less complexity for reduced maintenance time and cost
- Proven contact system has more than 40 years of service experience in more than 25,000 tap-changers
Get to know more
| Document title | ID |
|---|---|
| Technical guide | 1ZSE 5492-106 |
| Declaration of conformity | 1ZSC000498-ABP |
| Ordering data form (.xlsm) Please note that this is an interactive form, which can be filled in, saved and sent to us by e-mail. |
1ZSC000498-ACB |
| Ordering data form explanations | 1ZSC000498-AAR |
| User's manual | 1ZSE 5492-156 |
| Installation and commissioning guide | 1ZSE 5492-118 |
| Maintenance guide | 1ZSE 5492-127 |
| Repair guide | 1ZSE 5492-130 |
| Spare parts list | 1ZSC000562-ACY |
| Accessories and protection devices | 1ZSC000562-AAD |
| Oil filter unit, type HPS 27/27, 54 | 1ZSC000562-AAF |
| Oil filter unit, type OLU | 1ZSC000562-AAR |
| Type designation | Drawing number |
|---|---|
| UBBLT | 5492 0088-1 |
| UBBRT, UBBDT | 5492 0088-2 |
| UBBLN | 5492 0088-3 |
| UBBRN, UBBDN | 5492 0088-4 |
| The drawing shows | Drawing number |
|---|---|
| Mounting on active part | 5492 0088-8 |
| Lifting tool for active part mounting | 5492 0088-7 |
| External drive shaft system | 5492 0088-9 |
| Bevel gear | 5492 0083-1 |
| Top section accessories | 5492 0088-17 |
| Connection of oil filter unit to top section | 5492 0088-15 |
| Recommended flange on transformer cover | 5492 0088-11 |
| Ball valve | 1ZSC000772 |
| Pressure relay | 5492 0083-2 |
| Oil flow relay | 1ZSC003527-ABB |
| Pressure relief device - flow diameter 50 mm, standard - Comem | 1ZSC003721-AAW |
| Pressure relief device - flow diameter 50 mm, class C5-M - Comem | 1ZSC003721-AAV |
| Temperature relay | 1ZSC003716-AAM |
| Tie-in resistors for UBBRN, UBBDN (136 kohm) | 5492 0050-27 |
| Tie-in resistors for UBBRN, UBBDN (204-300 kohm) | 5492 0050-28 |
| Tie-in resistors for UBBRT, UBBDT (136-200 kohm) except for 7-13 pos. | 5492 0050-19 |
| Tie-in resistors for UBBRT, UBBDT for 7-13 pos. | 5492 0050-34 |
| Number of positions | Max. number of turns | Min. number of turns |
|---|---|---|
| 5 | 5492 0387-1 | 5492 0390-1 |
| 6 | 5492 0387-2 | 5492 0390-2 |
| 7 | 5492 0387-3 | 5492 0390-3 |
| 8 | 5492 0387-4 | 5492 0390-4 |
| 9 | 5492 0387-5 | 5492 0390-5 |
| 10 | 5492 0387-6 | 5492 0390-6 |
| 11 | 5492 0387-7 | 5492 0390-7 |
| 12 | 5492 0387-8 | 5492 0390-8 |
| 13 | 5492 0387-9 | 5492 0390-9 |
| 14 | 5492 0387-10 | 5492 0390-10 |
| Number of positions | Max. number of turns | Min. number of turns |
|---|---|---|
| 7 | 5492 0388-1 | 5492 0391-1 |
| 9 | 5492 0388-2 | 5492 0391-2 |
| 11 | 5492 0388-3 | 5492 0391-3 |
| 13 | 5492 0388-4 | 5492 0391-4 |
| 15 | 5492 0388-5 | 5492 0391-5 |
| 17 | 5492 0388-6 | 5492 0391-6 |
| 19 | 5492 0388-7 | 5492 0391-7 |
| 21 | 5492 0388-8 | 5492 0391-8 |
| 23 | 5492 0388-9 | 5492 0391-9 |
| 25 | 5492 0388-10 | 5492 0391-10 |
| 27 | 5492 0388-11 | 5492 0391-11 |
| Number of positions | Max. number of turns | Min. number of turns |
|---|---|---|
| 7 | 5492 0389-1 | 5492 0392-1 |
| 9 | 5492 0389-2 | 5492 0392-2 |
| 11 | 5492 0389-3 | 5492 0392-3 |
| 13 | 5492 0389-4 | 5492 0392-4 |
| 15 | 5492 0389-5 | 5492 0392-5 |
| 17 | 5492 0389-6 | 5492 0392-6 |
| 19 | 5492 0389-7 | 5492 0392-7 |
| 21 | 5492 0389-8 | 5492 0392-8 |
| 23 | 5492 0389-9 | 5492 0392-9 |
| 25 | 5492 0389-10 | 5492 0392-10 |
| 27 | 5492 0389-11 | 5492 0392-11 |
| Movie title | ID |
|---|---|
| Tap-changers by ABB: Based on traditions - geared for change | 1ZSC000717-AAM |
| Life cycle support: Training centers | 1ZSC000717-ABD |
| Tap-changer retrofit: Transformer life extension | 1ZSC000717-ABY |
| It's all about commitment: Life cycle support | 1ZSC000717-ACX |
