TUOe — oil-immersed earthing transformers 100–4000 kVA, 1–37 kV
Oil-immersed TUOe earthing transformers create an artificial neutral in medium-voltage networks with an isolated neutral or with delta-connected windings. An arc suppression coil (Petersen coil) or a resistor is connected to the neutral.
- Compensation power
- 100–4000 kVA (range 273–2180 kVA)
- HV voltage
- 1–37 kV (15.75; 21 kV, etc.)
- Auxiliary power
- 100 kVA (50–315 kVA on request)
- LV voltage
- 0.4 kV
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
Oil-immersed TUOe earthing transformers create an artificial neutral in medium-voltage networks with an isolated neutral or with delta-connected windings. An arc suppression coil (Petersen coil) or a resistor is connected to the neutral. The transformer is three-phase; in the absence of an earth fault its 0.4 kV secondary winding supplies the substation's own needs. During a phase-to-earth fault the neutral is at phase voltage and the compensation current flows through it; the HV winding can carry this current at the same time as the continuous rated load of the secondary winding. The ZNyn11 (zigzag) connection distributes the fault current across all phases and reduces it in the faulted line. Range: compensation power 100–4000 kVA for voltages of 1–37 kV. Standard types TUOe 275/15 … 2180/15 for 15.75 kV and TUOe 365/20 … 1940/20 for 21 kV have compensation currents from 30–15 to 240–120 A and auxiliary power of 100 kVA; short-circuit voltage 4.5–5.5 %; mass from 1380 to 2970 kg. On request: auxiliary power of 50, 160, 250, 315 kVA, other voltages (6.3; 10.5 kV, etc.) and current ranges. Permissible load in terms of compensation current: 100 % — 2 hours, 87.5 % — 4 hours, 75 % — 8 hours, 62.5 % and 50 % — continuous. Design: three-limb core of cold-rolled steel; windings of electrolytic copper (wire or strip); voltage regulation ±5 % by an off-circuit switch in the tank with a manual drive on the cover and position interlocking; welded tank with radiators or corrugated walls; trolley with movable rollers. Versions with a conservator and sealed versions are produced. Tolerances: no-load and short-circuit losses +15 %, total +10 %, no-load current +30 %, short-circuit voltage ±20 %. Supply with cable plug-in bushings, surge arresters and anti-vibration supports is available. Applications: power supply centres and distribution substations of 6–35 kV with a compensated or resistance-earthed neutral, paired with DGOe arc suppression coils. Standards: PN-EN 60076-1, -2, -6.
Technical specifications
| Compensation power | 100–4000 kVA (range 273–2180 kVA) |
|---|---|
| HV voltage | 1–37 kV (15.75; 21 kV, etc.) |
| Auxiliary power | 100 kVA (50–315 kVA on request) |
| LV voltage | 0.4 kV |
| Connection | ZNyn11 |
| Compensation current | 30–240 A |
| Load | 100 % — 2 h; 87.5 % — 4 h; 75 % — 8 h; ≤62.5 % — continuous |
| Voltage regulation | off-load tap changer ±5 % |
| Design | with conservator or sealed |
| Standards | PN-EN 60076-1/-2/-6 |
Replacement for
ФМЗО, ТМПС (neutral-forming ZNyn 6–35 kV)
selected by purpose and main parameters, please confirm with our manager
Request a price and lead time
TUOe — oil-immersed earthing transformers 100–4000 kVA, 1–37 kV. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
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