Oil cooling systems in different mounting variants

Transformer Oil Air Coolers

Our range of transformer oil air coolers for forced oil cooling systems can be supplied in different mounting variants. The standard air cooler version is designed for direct mounting on the transformer tank. In addition, our range of products comprises free-standing transformer oil coolers designed to customer specifications.

Kelvion TOAC Smart
Kelvion TOAC Smart
Kelvion TOAC Advanced
Kelvion TOAC Advanced
Kelvion TOAC Premium
Kelvion TOAC Premium

Transformer oil air coolers are available in different design versions.

The Kelvion TOAC Smart:
This version is optimized for lowest production costs to meet requirements for standard projects.

The Kelvion TOAC Advanced:
A cooler variant for low production costs due to modular build up. Designed to meet standard projects requirements and some additional specifications.

The Kelvion TOAC Premium:
For more than 80 years, we have manufactured transformer oil air coolers of galvanized steel construction. The key component of this cooler type is the proven elliptical finned tube. Individual designed for highest quality, stability and longest lifetime to meet the most complex project requirements.

Advantages
  • Compact construction
  • Optimized heat transfer capabilities due to optimized tube bundle
  • Material selection according to specific requirements
  • Long service life
  • 100% flushed with heated transformer oil, particles monitored
  • Low air-side pressure loss due to elliptical finned tube
  • Excellent corrosion protection due to hot-dip galvanized coating
  • Longest service life
  • Durable bond between the fin and core tube
  • Easy to clean due to robust, hot-dip galvanized steel fins
  • Welded design without gaskets and risk of oil leakages
  • 100% flushed with heated transformer oil, particles monitored
Get in touch with Kelvion in United States of AmericaOr give us a call +1 800 774 0474
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Smart

For this type of cooler, cost-optimized compact systems and support structures are used. The transformer oil flows through round copper tubes. Air-side heat transfer is ensured by variety of aluminum or copper fin plates. The bond between the core tube and the fin plates is obtained by mechanical expansion. The copper tubes are braced into a cooper manifold. Due to optimizing material thickness and frame design the manufacturing costs of these coolers are on a very low level and can be offered at favorable prices. Copper/aluminum systems offer advantages in clean and non-corrosive environments.

We supply these transformer oil coolers in capacities from 100 kW to 400 kW.

Or short alternative:

Kelvion TOAC Smart

  • compact fin bundle with copper tube and a choice of various fin material
  • cost optimized design with cooper manifold headers and braced tubes
Advanced

For this type of cooler, cost-efficient compact systems with a modular frame design are used. The transformer oil flows through round copper or aluminum tubes. Air-side heat transfer is ensured by variety of aluminum or copper fin plates. The bond between the core tube and the fin plates is obtained by mechanical expansion. The tubes are rolled into the tube sheets. Due to the use of proven series production processes, the manufacturing costs of these coolers are moderate. Copper/aluminum systems offer advantages in clean and non-corrosive environments.

We supply these transformer oil coolers in capacities from 100 kW to 400 kW.

Or short alternative:

Kelvion TOAC Advanced

  • compact fin bundle with a choice of various tube and fin material
  • modular design with bolted header and rolled in tubes into the tube sheets
Premium

The key component of the galvanized steel version is the high-performance finned tube. Rectangular steel fins are pushed on to the elliptical steel tube. As the finned tubes are hot-dip galvanized, good metallic contact is ensured between the core tube and the wide fin collar. The fins will not come off under thermal or mechanical stress. Thus perfect heat transfer is ensured even after many years in operation.

The finned tubes are welded into the tube sheets using two weld passes, which ensures high mechanical strength as well as a durable bond that stays oil-tight for years. The elliptical core tube has the advantage of an aerodynamically efficient profile. This allows high cooling efficiency to be achieved, while keeping the pressure drop at a minimum. Small pressure drops bring down fan operating costs, as the drive motor power consumption is lower. Moreover, low-noise fans can be used. The robust construction of the galvanized finned tube offers also significant advantages when it comes to cooler cleaning. The rectangular steel fins with their relatively low height provide essentially higher mechanical strength compared to coolers with aluminum fins.

Cooling capacities range from 100 to 2,500 kW in non-sound-insulated and sound-insulated designs. Depending on our customers’ noise control specifications, sound insulating elements are provided on the suction and/or discharge side.


Or short alternative:

Kelvion TOAC Premium

  • mechanical very stable hot dip galvanized steel tubes and fins for highest corrosion protection
  • completely welded headers and tube to tubes sheets without gaskets and no possible risk of leakage
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