SLIM Transformer. Compact transformer solutions for new applications. Your partner in energy solutions

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1 SLIM Transformer Compact transformer solutions for new applications Your partner in energy solutions

2 A Challenge Challenge us. You want a transformer with an impossible combination of features: > > smaller and lighter for a given power rating; > > capable of handling severe overloads; > > smaller environmental footprint; > > safer, more reliable; > > requiring less servicing; > > with an extended lifetime; > > based on tried-and-tested technology; > > Meeting the latest IEC technical specifications. CG Power Systems Belgium can meet your challenge. Our SLIM transformers offer all this and more. A Proven Record Since the SLIM transformer was launched in 2001 numerous public and private enterprises have installed over of these units with an average rating of 2500 kva (ranging from 250 kva to 6.5 MVA) in various demanding applications. Reinforced by the experience gained from these installations, CG Power Systems is now offering the advantages of SLIM transformers to a broader range of users.

3 Opening New Vistas CG Power Systems Belgium SLIM transformers will bring you benefits in applications such as: The Technology that Makes It Possible CG Power Systems Belgium is a leader in transformer design. DuPont enjoys an unmatched reputation for developing synthetic insulating materials for high-performance applications. NOMEX fibre, launched by DuPont more than 40 years ago, retains its performance characteristics up to 220 C, and offers a unique balance of electrical, thermal, physical and chemical properties. When the former Pauwels and DuPont pooled their skills and expertise for liquid-filled distribution and medium-power transformers, the SLIM was born. The SLIM uses proven technologies in an innovative design, combining NOMEX thermal insulating technology with a Class K (fire-point >300 C) (1) dielectric fluid such as silicone fluid (IEC 60826) or synthetic ester (IEC 61099). The result is a compact, reliable, transformer with high overload capacity. The former Pauwels and now CG Power Systems has been using NOMEX in dry-type transformers for 20 years and since the 1990s also in mobile substation and traction transformers. CG today offers transformers in the SLIM range from 100 kva to 10 MVA, with voltages of 390 V to 66 kv, for 50 Hz or 60 Hz systems. Designs are always tailored to the customer s requirements. (1) Classification of insulating liquid as per IEC Classification of insulating liquids according to firepoint and net calorific value.

4 Value in Use Size and weight: When the wind industry wanted higher-rated, higher-voltage transformers, conventional units that were bigger and heavier proved unsuitable. Their size could not match the limited width of the tower access door, and their weight was a handicap. Back in 2001, the former Pauwels broke into the wind turbine market with a 770 mm-wide 2 MVA/20 kv transformer that fitted through a 800 mm wide door a first at that time. With added experience since then, CG Power Systems today builds 2.5 MVA/33 kv units that are only 680 mm wide. Typically, a SLIM transformer is about 30 % smaller and lighter than a conventional model with the same power rating. Comparison of Cast Resin Transformers (CRT) versus SLIM kva 630 CRT 630 SLIM * 1600 CRT 1600 SLIM Po W Pk 120 C W Uk % Lw db(a) L mm W mm H mm Mass kg * 630 SLIM respects losses and noise of a conventional immersed 630 kva and dimensions of 400 kva. SLIM transformers are the ideal alternative for dry-type and cast resin transformers. Dimensions and load losses can be matched while no-load losses, noise and performance under transient voltages, overloads or severe climatic conditions are superior. Overload Capability, Reduced Maintenance: To achieve higher reliability, RATP, the Paris public transport authority, has decided to install some 100 SLIM transformers (3.3 MVA, 4.4 MVA and 5.5 MVA) to handle bigger, more frequent overloads, with units that fit the limited space in track-side substations. As these SLIM units need no forced cooling, RATP has been able to eliminate fans, saving energy, reducing maintenance and noise. Safety and Reliability: A zero-fault electrical system is a must on the Aiguille du Midi platform. At 3842 metres in the French Alps, transformers are subject to frequent, violent lightning strikes. That is why the Compagnie du Mont Blanc has chosen a 250 kva SLIM rather than a dry-type transformer to replace a PCB-filled transformer on the mountain-top site. In Monaco, SLIM transformers were installed in buildings after the local fire authorities had been convinced of their excellent fire resistance. Compact and Economical: several industries have chosen the SLIM alternative to replace older transformers. Their compactness allows a power upgrade while the new optimised design offers reduced losses and no maintenance. In short: more value for your money.

5 Never a Simple Choice Compactness is the prime characteristic of SLIM transformers. But specifiers do not base their choice of a transformer on a single criterion. Look at the overall combination of what the SLIM range offers: Greater reliability, more flexibility: NOMEX insulation withstands up to 220 C with negligible thermal aging and degradation. This means extra capacity to handle peak loads, high ambient temperatures, current harmonics and other emergency situations. NOMEX thermal insulating technology boosts the thermal constraint of transformers by up to 50 % over conventional transformers. The SLIM design offers flexibility when upgrading existing installations. Cost savings in peripheral equipment can result from the use of existing connections, foundations and protection. Safety: The inherent self-extinguishing characteristics of NOMEX (2) plus a Class K3 (fire-point >300 C and net calorific value <32 MJ/kg) dielectric fluid results in high fire safety, thanks to reduced fire load and limited flammability. This translates into savings on safety-related protective equipment and insurance premiums. 630 kva/20 kv/410 V Monaco Respect for the environment: Pauwels advanced design uses fewer natural resources (copper, steel, up to 30 % less coolant). At the end of a transformer s lifetime, material disposal is not a problem: Class K3 dielectric fluid is environmentally friendly, non-toxic and fully recyclable; steel and copper can easily be recovered (thanks to the non-cast windings); NOMEX paper and pressboard can be handled as conventional non-hazardous waste. Reduced no-load losses: The SLIM design s no-load losses are typically about one-half of the no-load losses of dry-type transformers. With an electricity price of EUR/kWh, 8760 hours a year and a 30-year life expectancy, a 1000 kva SLIM transformer saves about half of its own initial purchase price, thanks to its 40 % lower no-load losses (1.5 kw against 2.3 kw). Meeting specifications: Besides exceeding conventional specifications, SLIM transformers also meet the requirements of the new IEC (3). (2) Fire behaviour of NOMEX is classified M1/F1 according to NF F , Class 94 V-0 according to UL, and Class 1 according to CSE RF2/75A. (3) IEC (2004): Design and application of liquid-immersed power transformers using high-temperature insulation materials. 4.4 MVA/15 kv/585 V RATP 2.6 MVA/33 kv/690 V WTGT with integrated HV fuses

6 More about SLIM transformers Can a SLIM help to solve your problem? Get in touch with our qualified and experienced sales team. CG Power Systems USA Inc One Pauwels Drive, Washington Missouri 63090, USA T F Du Pont de Nemours International S.A. P. O. Box 50 CH-1218 Le Grand-Saconnex Geneva, Switzerland T F E info.nomex@che.dupont.com usa@cgglobal.com - SLIM is a registered trademark of CG Power Systems DuPont and NOMEX are registered trademarks or trademarks of DuPont or its affiliates.