Product Introduction
Overview
• Hermetically sealed distribution transformers use a fully sealed oil-filled tank with corrugated walls to accommodate thermal expansion without a conservator. The oil is isolated from air and moisture, preserving dielectric strength and limiting corrosion. This compact, low-maintenance design provides reliable voltage transformation for distribution networks, especially where access is difficult, environmental exposure is high, or long service life is critical.
Application
• Hermetically sealed distribution transformers are applied in urban networks, renewables, industrial plants, and coastal or polluted areas where moisture, dust, or corrosive atmospheres are present. They support ground-mounted or pad-mounted installations, feeding residential, commercial, and light industrial loads. Minimal on-site maintenance and strong environmental protection help operators secure continuity of service in remote, space-constrained, or harsh locations worldwide, every day.
Technical
• Voltage Level: ≤36kV
• Rated Power: ≤3150 kVA
• Frequency: 50/60 Hz
• Insulation Grade: A
• Maximum Ambient Temperature: 55°C
• Altitude: ≤5000m
• Cooling Types: ONAN/ONAF, KNAN/KNAF
• Winding Material: Copper/Aluminum
• Voltage Regulation: Off Circuit
• Installation Options: Pole Mounted (≤630kVA) / Pad Mounted
• Structure Type: Fully Sealed / Conservator
• Insulating Medium: Natural/Synthetic Ester / Mineral Oil
• Rated Power: ≤3150 kVA
• Frequency: 50/60 Hz
• Insulation Grade: A
• Maximum Ambient Temperature: 55°C
• Altitude: ≤5000m
• Cooling Types: ONAN/ONAF, KNAN/KNAF
• Winding Material: Copper/Aluminum
• Voltage Regulation: Off Circuit
• Installation Options: Pole Mounted (≤630kVA) / Pad Mounted
• Structure Type: Fully Sealed / Conservator
• Insulating Medium: Natural/Synthetic Ester / Mineral Oil
Advantages
• Key advantages of hermetically sealed distribution transformers include reduced maintenance, extended oil and insulation life, and improved reliability under severe ambient conditions. The sealed tank minimizes oxidation, moisture ingress, and oil leakage risk, supporting consistent dielectric performance. Utilities benefit from fewer service interventions, lower lifecycle costs, and stable network performance in high-humidity, coastal, or heavily polluted environments worldwide, year-round, globally.
Feature
• Versatile Application: Suitable for diverse environments, both indoor and outdoor.
• Reliable Operation: Ensures safe and stable performance in various settings.
• Compact Design: Features a compact structure and small size for easy installation.
• High-Quality Insulation Oil: Utilizes vegetable or mineral oil, with vegetable oil offering environmental benefits and a high ignition point.
• Maintenance-Free: Hermetically sealed design prevents leakage and eliminates maintenance needs throughout its lifecycle.
• Energy Efficiency: Complies with the latest standards, delivering high efficiency and energy savings.
• Reliable Operation: Ensures safe and stable performance in various settings.
• Compact Design: Features a compact structure and small size for easy installation.
• High-Quality Insulation Oil: Utilizes vegetable or mineral oil, with vegetable oil offering environmental benefits and a high ignition point.
• Maintenance-Free: Hermetically sealed design prevents leakage and eliminates maintenance needs throughout its lifecycle.
• Energy Efficiency: Complies with the latest standards, delivering high efficiency and energy savings.
