Overview

• A ground mounted distribution transformer with cable box is a liquid-filled three-phase unit installed on a concrete pad at grade. Segregated MV and LV cable boxes offer shielded, touch-safe terminations and flexible entry directions. The arrangement supports underground feeders, provides touch-safe connections, and simplifies interface with switchgear, ring main units, and low-voltage panels on modern distribution networks in space-constrained, reliability-focused installations worldwide today.

Application

• Ground mounted distribution transformers with cable boxes are applied on utility feeders, industrial plants, renewable interconnections, and commercial developments using underground or mixed cabling. They interface medium-voltage networks with low-voltage switchboards, providing safe terminations near load centers. The ground-mounted arrangement simplifies civil works, shortens cable runs, and supports phased capacity upgrades with minimal disruption to surrounding operations and future reinforcement.

Technical

• Voltage Level: ≤36kV
• Rated Power: ≤Power capacities from 10 kVA to 100,000 kVA
• Frequency: 50/60 Hz
• Insulation Grade: up to 170 kV
• Cooling Types: ONAN/ONAF/OFWF
• Winding Material: Copper/Aluminum
• Voltage Regulation: Off Circuit
• Insulating Medium: Natural/Synthetic Ester / Mineral Oil

Advantages

• Key advantages include fully enclosed cable terminations, reduced exposure of live parts, and straightforward underground cable routing. Factory-engineered cable boxes support standardized gland plates, bending radii, and stress relief, improving installation quality and reliability. Utilities gain safer interfaces, easier upgrades, and predictable maintenance while maintaining network flexibility for looping, teeing, and capacity increases, supporting asset longevity, safety, and network resilience.

Feature

• Compliance with Energy Performance Standards
Robust build with integrated quality control and proven performance
Proven supply chain integration
Qualified weld processes
Robust construction for transport to the most inaccessible locations
Excellent corrosion protection systems, including galvanised tanks for rugged long life protection (polemount transformers)
High fire point environmental fluid if beneficial

Environmental Conditions

• Suitable for both indoor or outdoor.

• Air temperature: Maximum temperature: +40ºC; Minimum temperature:-25ºC.

• Humidity: Monthly average humidity 95%; Daily average humidity 90% .

• Altitude above sea level: Maximum installation altitude: 2000m.

• Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.

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