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        • Product: Dry Type Transformer
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        DRY TYPE TRANSFORMERS

         

        Transformers/reactors/intelligent integrated substations-Smart Energy for Better Life

         

        Applications

        Dry type transformer is suitable for power transmission and distribution system, hotel, restaurant, hospitals, shopping malls, bank buildings ,stadiums, airports, stations especially heavy load centers and places with special fire protection requirements. Dry type transformer is the best choice for specific markets where safety or ecology are main concerns.

         

        WHY VERELEN

        1. One of the drafters of the National Standard Mine Flameproof Mobile Substations (GB/T 8286-xxxx ), which will replace the existing national standard (GB/T 8286-2005 ) and it was submitted for trial in Beijing.

        2. +20 years experience R&D team, derived from a 60 years of history transformer manufacturer in Changsha, Hunan, China since 1956.

        3. Full range of transformer types with customized functions are available.

        4. CE & ISO certificated.

         

        Below are the tests conducted by Varelen before delivery. Other tests required by clients can also be done accordingly.

        Insulation resistance

        Resistance of all windings

        Check voltage ratio and vector group

        No-load test at rated frequency and rated voltage

        Impedance test

        Withstand voltage test

        Induced over-voltage withstand test

        Partial discharge measurement

         

        Product Features:

        1. The three-limb iron core is made of oblique cut Grain-oriented, seven-step silicon steel laminations insulated on both sides, guaranteeing low losses and low noise. These values are even improved by laser treatment. It is protected on the surface with a flash-proof varnish in order to prevent the sheet from corrosion and to reduce the noise.

          

         

        2. Clamping frame: it is processed by CNC cutting, bending and then one-time punch forming, the hole’s size is accurate and the appearance looks delicate.

         

         

        3. The winding coil is made of oxygen-free copper, class H for main insulation materials and coil is insulated by NOMEX paper of DUPONT brand, LV winding is isolated by copper foils. All these make the heat-resistant is up to 220℃, with excellent overload capacity and low loss, but high efficiency.

          

         

        4. Varelen practices strictly exclusive casting system of F(155℃) or H(180℃), and the epoxy resin is injected and casted in the vacuum machine, so it’s highly insulated, dust-proof and moisture-proof, which ensures stable and reliable performance.

         

        5. Tap changer is available to adapt respective network conditions.

         

        Main specifications:

        Dry-type transformer type

        Cast resin

        Manufacturing standards

        IEC, ANSI, NFC52 etc

        Rated capacity

        up to 25MVA

        Rated Voltage

        Up to 36KV

        Phases

        single or three phase

        Tapping

        With tapping links or on-load tap changer

        Impedance

        On request

        Frequency

        50Hz or 60Hz

        Vector groups

        Dy, Yy, Yd as standard. Other on request

        class insulation

        According to IEC 60085, Class F or Class H

        Temperature rise

        With ambient temperature in accordance with IEC 60076-11

        Type of cooling

        AN/AF

        IP rate

        IP00 to IP54

        Environment class

        E2

        Climate class

        C2

        Fireproof class

        F1


                   

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