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Control Transformer

  • Control Transformer
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    • Control Transformer

    At Denki Seigyo, we design and manufacture high-quality custom transformers tailored to your exact specifications. Our range includes control, isolation, step-down, and distribution transformers from 50 VA to 500 kVA, built using premium CRGO cores and high-grade copper windings. Every unit is engineered for maximum efficiency, low losses, and superior reliability under diverse industrial conditions.
    Choose Denki Seigyo for precision-built, durable, and fully customizable transformer solutions that power your automation and electrical systems with confidence.

     

     

    For more details. Denki_Seigyo_500VA_Transformer_Datasheet

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    Control Transformer
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    Technical Specification for Transformer

    1. General Information

    Parameter Specification
    Type Single Phase, Double Wound, Air / Oil Cooled (as required)
    Application Step-down / Control / Isolation Transformer
    Rated Capacity 500 VA and Customizable as per requirement.
    Frequency 50 Hz ±3%
    Phase Single Phase
    Duty Continuous (S1 Duty)

    2. Electrical Parameters

    Parameter Specification
    Primary Voltage 230 V AC ±10% (customizable e.g., 415V)
    Secondary Voltage 110 V / 24 V / 12 V AC (as per design)
    Connection Type Two winding, Delta / Star as applicable
    Tapping Range ±5% (if required)
    Power Factor 0.8 lag (typical for rating)
    Impedance Voltage 4–6% (typical)
    Efficiency ≥ 95% at full load
    Regulation Within ±5% from no-load to full-load

    3. Constructional Features

    Component Specification
    Core Material Cold Rolled Grain Oriented (CRGO) Silicon Steel Lamination, M4 or better
    Core Type Shell / Core type, low-loss laminated stack
    Winding Material Super Enamelled Copper (EC Grade)
    Winding Insulation Class ‘B’ (130°C) / Class ‘F’ (155°C) as specified
    Terminals Brass studs / terminal blocks / flying leads
    Insulation Resistance (IR) ≥ 100 MΩ at 500 V DC (megger test)
    Dielectric Strength 2.5 kV RMS for 1 minute between windings and earth
    Cooling Type AN (Air Natural) / ONAN (Oil Natural Air Natural)
    Mounting Type Floor / Wall / Panel mounting
    Enclosure Powder-coated MS box, IP23 / IP44 (as required)

    4. Temperature & Environment

    Parameter Specification
    Ambient Temperature Up to 45°C
    Maximum Temperature Rise 55°C (oil-cooled) / 75°C (air-cooled)
    Relative Humidity Up to 95% (non-condensing)
    Altitude Up to 1000 m above MSL

    5. Testing and Standards

    Test Requirement
    Type Tests As per IS 2026 / IS 11171 / IEC 60076
    Routine Tests 1. Ratio Test
    2. Polarity and Phase test
    3. No-load loss and current
    4. Load loss and impedance voltage
    5. Insulation resistance
    6. High voltage (HV) test
    Applicable Standards IS: 2026 (Power Transformers)
    IS: 11171 (Dry-Type)
    IEC 60076

    6. Accessories (if applicable)

    • Lifting lugs

    • Earthing terminals

    • Nameplate (engraved stainless steel)

    • Oil level gauge (for oil-cooled)

    • Drain plug and filling cap

    • Breather (for oil-cooled type)

    8. Guarantee/Warranty

    • 12 month from the date of installation or 18 month from the date of manufacturing whichever earlier.