On-load tap changers type UZF
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.
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
Get to know more
| 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 |
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