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Green T.HE CAST RESIN TRANSFORMERS
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Green T.HE CAST RESIN TRANSFORMERS - 1

THE GLOBAL SPECIALIST IN ELECTRICAL AND DIGITAL BUILDING INFRASTRUCTURES

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Contents 4-9 General features Green T.HE cast resin transformers Advantages of Green T.HE transformers Product News Certified quality 10-13 Catalogue Cast resin HV/LV Green T.HE Insulation class 12 kV Insulation class 17.5 kV Insulation class 24 kV Insulation class 36 kV 13-14 Technical Installation accessories information

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From 2021, the new European Commission Ecodesign Directive comes into force imposing stricter efficiency standards. From July 2021 (tier 2), regulation 548/2014 (updated by Regulation 2019/1783) requires manufacturers to produce transformers with no-load loss reduced by 10% compared with the previous requirement. The Legrand Green T.HE transformers fully comply with the new eco-compatible design rules and guarantee a significant reduction in energy consumption, thus promoting significant economic savings and the reduction of C02 emissions into the atmosphere. Standard EN 50708-2-1 applies...

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CLASSIFICATION The classification of a cast resin transformer depends on the value of the no-load loss (P0), as well as the load loss (Pk). More precisely, P0 losses are independent from the loads and remain constant for the whole time the transformer is connected to the electrical grid. On the other hand, Pk losses only occur when the transformer is feeding a load and they are proportional to the square of the load. ECODESIGN REQUIREMENTS

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Green T.HE rRANSFORMERS I Low partial discharges, HIGH quality Partial discharges are microscopic phenomena occurring inside insulating resin cavities are a factor in the speeding up of the ageing process of a transformer. Therefore, it is important that the values of such currents are limited. According to the product standard regarding the design of resin transformers (IEC 60076-11), all windings with a voltage of 5 3.6 kV are subject to the measure of partial discharges and the value measured should not exceed 10 pC (picocoulomb). When the Green T.HE transformers were subjected to the...

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Extreme environmental conditions The IEC 60076-11 standard identifies the environmental, climatic and fire behaviour classes of dry-type transformers with an alphanumeric code. Thanks to the use of high-quality epoxy resins, all Legrand transformers minimize environmental impact and comply with the following classes: • Environmental class E3 • Climate class C2 • Fire behaviour class F1 This means that they can be stored, transported and above all used under extreme environmental conditions: - Minimum room temperature: -25 °C - Maximum relative humidity: 95% Furthermore, in standard...

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With the new Green T.HE series (tier 2), Legrand offers its customers a very high-quality product, with excellent performance and reduced losses, in full compliance with regulation 548/2014 and subsequent updates (EU regulation 2019/1783). Thanks to the use of innovative materials and the measures taken during their design, the new transformers are characterised by the following distinctive features: • HV (high voltage) and LV (low voltage) terminals have been modified and built to facilitate the connection of the product on both windings. Updated HV terminals Updated LV terminals The HV...

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TESTING A UTHORIZA TION ACAE (Associazione per la Certificazione delle Apparecchiature Elettriche), Member of LOVAG (Low Voltage Agreement Group) authorizes the Laboratory B Ticino S.p.A. based in Via E.Ferrari ,Z.I. Villa Zaccheo - 64020 Castellalto (TE) Laboratory codification number: IB 03 to carry out the tests listed in the following, for the purpose to certify the products as stated in the Certificate n° 07OB and its enclosure, issued to ACAE by ACCREDIA. List of the authorized tests on the power transformers: Measurement of voltage ratio and check of phase displacement Measurement of...

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CAST RESIN HV/LV Green T.HE Compliance with the standards: IEC 60076-11 and EN 50708 Power: 100–3150 kVA Frequency: 50 Hz Tapping links, HV side: ± 2 x 2.5% Vector group: Dyn11 Thermal class of the insulation system: 155 °C (F) / 155 °C (F) Temperature rise: 100 K / 100 K Environmental Class: E3-C2-F1 Primary Voltages: from 6 to 11 kV. Insulation class: 12 kV BIL 75 kV Secondary Voltages no-load: from 400 to 433 V (insulation class ≤ 1,1 kV)) Primary Voltages: from 12 to 15.75 kV. Insulation class: 17.5 kV BIL 95 kV Secondary Voltages no-load: from 400 to 420 V (insulation class ≤ 1,1 kV))...

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This table shows the characteristics and codes of transformers with 10/0.4 kV ratio and Dyn11 vector group. The losses information is also valid for various transformer ratios and vector groups. This table shows the characteristics and codes of transformers with 15/0.4 kV ratio and Dyn11 vector group. The losses information is also valid for various transformer ratios and vector groups. A dedicated application is available for the cost estimate and the ordering of transformers. For more details please contact Legrand. Enclosure with accessories. For more information, please see page 14

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This table shows the characteristics and codes of transformers with 33/0.4 kV ratio and Dynll vector group. The losses information is also valid for various transformer ratios and vector groups. A dedicated application is available for the cost estimate and the ordering of transformers. For more details please contact Legrand. * Enclosure with accessories. For more information, please see page 14

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GREEN T.HE - Cast resin transformersInstallation accessories Type [R;An]ge No. At [°C] Mounting

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Enclosure ventilation grid IP31 Enclosure ventilation grid IP23 ENCLOSURES There are 9 enclosure sizes available, with the possibility to choose 2 types of ventilation grill for each one, IP31 and IP23. It is also possible to choose the transformer with the enclosure either assembled or disassembled, to be assembled on site. All the indicated protection enclosures are compatible with the installation of Zucchini busbar ducts It is also possible to provide customized solutions based on specific requirements: please contact Legrand. DIMENSIONS AND HOLES OF THE LV CONNECTION TERMINALS 40...

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