UZ type on-load tap-changers are of the single compartment, on-tank type. The selector and switching mechanisms are combined (selector switch) and are located in the main compartment with the motor drive mechanism welded to the outside. The unit is supplied fully assembled and ready to mount on the outside of the transformer tank.
Maintenance and inspection of the tap-changer are simplified since access to the active part of the tap-changer is made easy with a large, hinged door panel on the front of the compartment. The UZF model also features an angled active part with an access panel on top of the compartment. This bolted panel allows easy access to the transformer lead connections for ease of installation and/or maintenance.
On-load tap-changers type UZF
Product scope
- Base technology: Conventional, resistance, on-tank, selector switch
- Common applications: Network, special, industrial
Tap-changer placed in the neutral point of the winding |
Other placements of the tap-changer |
|
Highest voltage for equipment (Um) |
145 kV |
145 kV |
Max lightning impulse (BIL) |
650 kV |
650 kV |
Max current |
600 A |
600 A |
Max step voltage |
2000 V |
2000 V |
Why Hitachi Energy?
- Maintenance can be performed from ground level
- Sliding contacts for enhanced reliability
- Trouble-free maintenance as no shaft system to disassemble
- Electrically very strong; tie-in resistors are seldom needed
On-load tap changers type UZF
Get to know more
| Document title | ID |
|---|---|
| Technical guide | 1ZSE 5492-104 |
| Declaration of conformity | 1ZSC000498-ABM |
| Ordering data form (From Ludvika, Sweden) Please note that this is an interactive form, which can be filled in, saved and sent to us by e-mail. |
1ZSC 5492-167 |
| Ordering data form (From Alamo, TN, USA) | US 5492 0042-A |
| Ordering data form explanations | 1ZSC000498-AAN |
| User's manual | 1ZSE 5492-154 |
| Design criteria for OLTC oil conservator type UZ | 5492 0083-6 |
| Installation and commissioning guide | 1ZSE 5492-115 |
| Maintenance guide | 1ZSE 5492-123 |
| Repair guide | 1ZSE 5492-128 |
| Spare parts list | 1ZSC000562-ACU |
| Accessories and protection devices | 1ZSC000562-AAD |
| Oil filter unit, type HPS 27/27, 54 | 1ZSC000562-AAF |
| Oil filter unit, type OLU | 1ZSC000562-AAR |
| Insulation level | Connection | Type of mounting | Drawing number |
|---|---|---|---|
| 200, 250 | N, T | Bolted | 5492 0090-2 |
| Welded | 5492 0090-6 | ||
| 380 | N, T | Bolted | 5492 0090-3 |
| Welded | 5492 0090-7 | ||
| 550, 650 | N | Bolted | 5492 0090-4 |
| Welded | 5492 0090-8 | ||
| T | Bolted | 5492 0090-13 | |
| Welded | 5492 0090-14 |
| The drawing shows | Drawing number |
|---|---|
| Accessories | 5492 0090-9 |
| Accessories for UZF with oil filter unit | 5492 0090-16 |
| Accessories for UZF with oil heater | 5492 0090-19 |
| Oil conservator for 200 and 250 kV | 5492 0090-10 |
| Oil conservator for 380 kV | 5492 0090-11 |
| Oil conservator for 550 and 650 kV | 5492 0090-12 |
| Terminal board UZE and UZF | 5492 853-42 |
| Two connection openings FL21 UZF | 5492 0090-15 |
| Connection of oil filter unit to UZ | 5492 0090-20 |
| Ball valve | 5492 0083-14 |
| 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 |
| Temperature relay | 1ZSC003716-AAM |
| Temperature sensor | 1ZSC005333-AAF |
| Thermo switch housing | 5492 0083-27 |
| Thermo switch housing with switch | 5492 0083-35 |
| Number of positions | Max. number of turns | Min. number of turns |
|---|---|---|
| 5 | 5492 0393-1 | 5492 0396-1 |
| 6 | 5492 0393-2 | 5492 0396-2 |
| 7 | 5492 0393-3 | 5492 0396-3 |
| 8 | 5492 0393-4 | 5492 0396-4 |
| 9 | 5492 0393-5 | 5492 0396-5 |
| 10 | 5492 0393-6 | 5492 0396-6 |
| 11 | 5492 0393-7 | 5492 0396-7 |
| 12 | 5492 0393-8 | 5492 0396-8 |
| 13 | 5492 0393-9 | 5492 0396-9 |
| 14 | 5492 0393-10 | 5492 0396-10 |
| 15 | 5492 0393-11 | 5492 0396-11 |
| 16 | 5492 0393-12 | 5492 0396-12 |
| 17 | 5492 0393-13 | 5492 0396-13 |
| Number of positions | Max. number of turns | Min. number of turns |
|---|---|---|
| 9 | 5492 0394-1 | 5492 0397-1 |
| 11 | 5492 0394-2 | 5492 0397-2 |
| 13 | 5492 0394-3 | 5492 0397-3 |
| 15 | 5492 0394-4 | 5492 0397-4 |
| 17 | 5492 0394-5 | 5492 0397-5 |
| 19 | 5492 0394-6 | 5492 0397-6 |
| 21 | 5492 0394-7 | 5492 0397-7 |
| 23 | 5492 0394-8 | 5492 0397-8 |
| 25 | 5492 0394-9 | 5492 0397-9 |
| 27 | 5492 0394-10 | 5492 0397-10 |
| 29 | 5492 0394-11 | 5492 0397-11 |
| 31 | 5492 0394-12 | 5492 0397-12 |
| 33 | 5492 0394-13 | 5492 0397-13 |
| Number of positions | Max. number of turns | Min. number of turns |
|---|---|---|
| 13 | 5492 0395-1 | 5492 0398-1 |
| 15 | 5492 0395-2 | 5492 0398-2 |
| 17 | 5492 0395-3 | 5492 0398-3 |
| 19 | 5492 0395-4 | 5492 0398-4 |
| 21 | 5492 0395-5 | 5492 0398-5 |
| 23 | 5492 0395-6 | 5492 0398-6 |
| 25 | 5492 0395-7 | 5492 0398-7 |
| 27 | 5492 0395-8 | 5492 0398-8 |
| 29 | 5492 0395-9 | 5492 0398-9 |
| Number of positions | Max. number of turns |
|---|---|
| 5 + 5 | 5492 0399-1 |
| 6 + 6 | 5492 0399-2 |
| 7 + 7 | 5492 0399-3 |
| 8 + 8 | 5492 0399-4 |
| 9 + 9 | 5492 0399-5 |
| 10 + 10 | 5492 0399-6 |
| 11 + 11 | 5492 0399-7 |
| 12 + 12 | 5492 0399-8 |
| 13 + 13 | 5492 0399-9 |
| 14 + 14 | 5492 0399-10 |
| Movie title | ID |
|---|---|
| Tap-changers by ABB: Based on traditions - geared for change | 1ZSC000717-AAM |
| Life cycle support: Training centers | 1ZSC000717-ABD |
| It's all about commitment: Life cycle support | 1ZSC000717-ACX |
