Overview
The oil-filled power transformer uses a fully sealed oil tank structure so that the transformer oil does not come into contact with air, which prolongs the service life. The oil tank and the tank edge can be connected by bolts or welded.
Compared with the original S9, the no-load loss is reduced by an average of more than 29.25%, the no-load current is reduced by more than 37.9%, and the operating cost is reduced by an average of more than 18.9%.
The three-phase oil-immersed power transformer adopts a new insulation structure, which improves the short-circuit resistance. The iron core is made of high-quality cold-rolled grain-oriented silicon steel sheets, and the high voltage and low voltage windings are made of high-quality oxygen-free copper wires in a multi-layer cylindrical process structure.
Key Features
- Energy saving — compared with the original S9, the no-load loss is reduced by an average of more than 29.25%, the no-load current is reduced by more than 37.9%, and the operating cost is reduced by an average of more than 18.9%.
- Long service life — the transformer oil tank adopts a fully sealed structure and the transformer oil does not contact with air, which prolongs the service life.
- Bolted or welded tank connection — the oil tank and the tank edge can be connected by bolts or welded.
- High operation reliability — the components related to the oil tank sealing have been improved, which increases reliability, and the process level is improved to ensure the reliability of sealing.
- Small floor area — the fully sealed transformer oil tank adopts a corrugated radiator and has a beautiful appearance and a small floor area.
- Corrugated plate replaces the oil conservator — when the oil temperature changes, the thermal expansion and contraction of the corrugated plate can replace the function of the oil conservator.
- New insulation structure — the three-phase oil-immersed power transformer adopts a new insulation structure, which improves the short-circuit resistance.
- High-quality core and windings — the iron core is made of high-quality cold-rolled grain-oriented silicon steel sheets, and the windings are made of high-quality oxygen-free copper wires with a multi-layer cylindrical process structure.
- Anti-loosening fasteners — all fasteners are treated with special anti-loosening and have high mechanical strength.
- Permanently sealed tank — the corrugated oil tank shell adapts to the expansion of oil with its own elasticity — it is a permanently sealed oil tank, widely used in various power distribution equipment.
Technical Specifications
| Product type | Oil-filled power transformer |
|---|---|
| Transformer type | Three-phase oil-immersed power transformer |
| Tank structure | Fully sealed oil tank |
| Tank connection | Oil tank and tank edge connected by bolts or welded |
| Radiator | Corrugated radiator (corrugated plate oil tank) |
| Oil conservator | Not required — the corrugated plate replaces its function |
| No-load loss versus S9 | Reduced by an average of more than 29.25% |
| No-load current versus S9 | Reduced by more than 37.9% |
| Operating cost versus S9 | Reduced by an average of more than 18.9% |
| Insulation structure | New insulation structure, improved short-circuit resistance |
| Iron core | High-quality cold-rolled grain-oriented silicon steel sheets |
| Windings | High-quality oxygen-free copper wires, multi-layer cylindrical process structure |
| Fasteners | Treated with special anti-loosening, high mechanical strength |
| Sealing | Permanently sealed oil tank; oil does not contact with air |
Applications
- Power distribution equipment — the permanently sealed oil tank has been widely used in various power distribution equipment.
- Installations with limited space — the corrugated plate oil tank has a small floor area.
- Projects targeting lower operating cost — where the reduced no-load loss and no-load current versus S9 are of value.
- Sites requiring long service life — where the fully sealed structure, with oil not contacting air, is an advantage.
- Systems needing short-circuit resistance — the new insulation structure improves short-circuit resistance.
Installation Conditions
- The transformer oil tank is fully sealed, so the oil does not contact with air and no separate oil conservator is fitted — the corrugated plate replaces its function.
- Confirm the oil tank and tank edge connection method — bolted or welded — as part of the installation arrangement.
- Allow space around the corrugated radiator, since the corrugated plate flexes with oil temperature changes.
- The corrugated oil tank shell adapts to oil expansion with its own elasticity, so the tank should be installed without restricting that movement.
How to Select
- The rated capacity and voltage ratio required for the distribution system.
- Whether the energy-saving performance versus S9 — lower no-load loss, no-load current and operating cost — is a project requirement.
- The floor area available, given the small footprint of the corrugated plate oil tank.
- The short-circuit resistance required, which the new insulation structure addresses.
- The oil tank connection method preferred on site — bolted or welded.
FAQ
How much does the transformer save compared with the S9?
Compared with the original S9, the no-load loss is reduced by an average of more than 29.25%, the no-load current is reduced by more than 37.9%, and the operating cost is reduced by an average of more than 18.9%.
Why does the transformer have a long service life?
The transformer oil tank adopts a fully sealed structure, so the transformer oil does not contact with air, which prolongs the service life.
Does it need an oil conservator?
No. When the oil temperature changes, the thermal expansion and contraction of the corrugated plate can replace the function of the oil conservator. It is a permanently sealed oil tank.
What materials are used for the core and windings?
The iron core is made of high-quality cold-rolled grain-oriented silicon steel sheets, and the high voltage and low voltage windings are made of high-quality oxygen-free copper wires in a multi-layer cylindrical process structure.
How is the oil tank connected?
The oil tank and the tank edge can be connected by bolts or welded.
What improves the short-circuit resistance?
The three-phase oil-immersed power transformer adopts a new insulation structure, which improves the short-circuit resistance.
How are the fasteners treated?
All fasteners are treated with special anti-loosening and have high mechanical strength.
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