Rating: 25 kVA To 10 MVA
Dual Voltage: 15-20/0.4 kV, 15-20/0.38 kV, 11-15/0.4 kV, 11-15/0.38 kV
Frequency: 50Hz/60Hz

Loop feed system transformers are widely used in power distribution networks, particularly in underground and pad-mounted installations. These transformers provide a continuous power supply by allowing multiple paths for electricity flow, enhancing system reliability and redundancy.
Features of Loop Feed Transformers
•    Oil-Immersed: These transformers are filled with insulating mineral oil or biodegradable fluid to provide cooling and insulation.
•    ANSI Standards Compliance: Designed according to ANSI/IEEE C57 standards for safety, efficiency, and reliability.
•    Loop Feed Design: Equipped with multiple bushings and switching compartments for easy interconnection in loop distribution networks.
•    Pad-Mounted: Enclosed in a weather-resistant steel cabinet for outdoor installations.
•    Dead-Front or Live-Front Options: Provides safe and efficient operation depending on utility requirements.
Applications
•    Used in underground power distribution for residential, commercial, and industrial areas.
•    Common in utility grids where system redundancy and reliability are crucial.
•    Supports medium-voltage distribution systems (typically 15 kV, 25 kV, or 35 kV class).
Technical Specifications
•    Voltage Rating: Commonly available in 5 kV to 35 kV primary voltage classes.
•    Cooling System: ONAN (Oil Natural Air Natural) cooling system.
•    Insulation Levels: Designed to withstand impulse voltages per ANSI C57.12.00 standards.
•    Protection Features:

• o    Load-break switches and bayonet fuses for fault isolation.
• o    Pressure relief devices and oil temperature indicators.
• o    Optional surge arresters for transient voltage protection.

Advantages
•    Enhanced Reliability: Multiple feeder connections ensure power continuity in case of faults.
•    Efficient Load Management: Allows redistribution of loads within the network.
•    Compact and Safe: Suitable for space-constrained urban environments with tamper-proof enclosures.
•    Low Maintenance: Oil-immersed design reduces the risk of overheating and extends transformer life.