Medium Voltage Dry Type Distribution Transformers
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Product Details
Medium Voltage Dry Type Distribution Transformers
Silverstone Electric medium-voltage dry-type transformers are designed to meet the demanding requirements of many industrial, commercial and utility applications. Typical applications include, data centres, hospitals, schools, hotels, mining, paper mills, steel mills, shopping centres, manufacturing plants, airport terminals, water treatment plants, and other applications requiring the size, weight, safety and environmental advantages of a dry-type transformers.
Standard Ratings
Silverstone Electric transformers are suitable for operation in relatively clean environments and under "usual service conditions" as defined by IEEE Standard C57.12.01.
• Power: 225-2,500 kVA three-phase, self-cooled AA-rated
• High-voltage rating: 2.4 kV-34.5 kV
• High-voltage BlL: up to 150 kV (per IEEE standards)
• Low-voltage rating: 120 V?600 V
• Low-voltage BlL: up to 30 kV (per IEEE standards)
• Temperature rise at rated load: 150°C (at 30°C average/40°C maximum ambient)
• Frequency: 60 Hz. Standard Design Features and Accessories
• 220°C insulation system
• Step-lap mitered core
• Core ground strap (insulated core with single ground point)
• Painted core
• High-voltage taps (two 2-1/2% above and below nominal)
• NEMA 1 enclosure
• Lifting eyes
• Provisions for rolling
• Capability for adding cooling fans (units over 500 kVA)
• Electrostatically applied powder exterior finish with urethane top coat (ANSI 61 gray)
• Ground pad
• Diagrammatic nameplate (aluminum)
Standard Design Features and Accessories
• 220°C insulation system
• Step-lap mitered core
• Core ground strap (insulated core with single ground point)
• Painted core
• High-voltage taps (two 2-1/2% above and below nominal)
• NEMA 1 enclosure
• Lifting eyes
• Provisions for rolling
• Capability for adding cooling fans (units over 500 kVA)
• Electrostatically applied powder exterior finish with urethane top coat (ANSI 61 gray)
• Ground pad
• Diagrammatic nameplate (aluminum)
Optional Design Features and Accessories
Silverstone excels at producing custom designs for non-standard applications and can offer numerous optional features and accessories to suit a customer’s special requirements.
• Custom designs for special applications
• Loss optimisation for lower total owning cost
• Higher efficiency requirement
• 50 Hz. frequency
• Non-standard ambient conditions
• Non-standard BIL level
• Non-standard altitude requirement
• Non-standard sound requirement
• Higher overload capacity
• Low X/R ratios
• K- factor rated (K-1, K-4, K-9)
• Special seismic qualification
• Reduced vibration and vibration isolation
• Retrofit designs
• 80°C or 115°C temperature rise
• Automatic fan cooling package (FA rated)
• Digital temperature monitor
• Copper bus and windings
• Wye-wye connected windings
• Special taps available
• Provisions for parallel operation
• Ground bus (copper)
• Medium-voltage interrupter switch
• Lightning arresters
• R/C snubbers
• Current transformers
• Potential transformers (contact factory)
• Power meter
• Control power transformer
• SCADA interface
• Space heaters with thermostat
• Flanged throats and air terminal chambers
• Dust filters (for non-UL listed transformers)
• Screens for insect and rodent proofing
• Wheels
• IR windows
• ANSI 49 or ANSI 70 external gray finish
• Stainless-steel enclosure
• Stainless-steel diagrammatic nameplate
Factory Inspection
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