500 kVA Cast Resin Dry Type Transformer

500 kVA Cast Resin Dry Type Transformer is prepared for indoor cast-resin transformer duty. It covers 4160V / 6.6kV / 11kV / 33kV input networks and 400V / 480V / 600V output distribution. It uses AN / AF cooling or thermal design data where specified. This series description presents the application, construction, protection, and specification details in finished product copy.

The Backbone of Commercial Power Distribution

For indoor cast-resin transformer duty, the Backbone of Commercial Power Distribution is treated as a practical design and selection point rather than generic catalog wording.

• The 500 kVA Dry Type Transformer functions as the critical node for medium-sized infrastructure, seamlessly bridging the gap between utility grids and building utilization voltages. Unlike smaller branch units, this capacity typically serves as the Main Incoming Transformer for office towers, shopping complexes, or data center IT rows.
• As a versatile medium voltage dry type transformers solution, it is engineered to accept primary inputs up to 35kV (commonly 11kV or 13.8kV). By installing this unit directly within the building's load center-rather than in a remote outdoor substation-facility managers can significantly reduce low-voltage cabling costs and distribution losses.

Types of Architecture: Cast Resin vs. VPI

For indoor cast-resin transformer duty, types of Architecture: Cast Resin vs. VPI is treated as a practical design and selection point rather than generic catalog wording.

• When selecting from various types of dry type transformer, the choice often dictates the unit's environmental resilience. We offer this 500 kVA model in two distinct configurations.
• Cast Resin (CRT): the standard recommendation for general indoor use. The HV windings are vacuum-cast in a solid epoxy block filled with silica. This structure is F1 Fire Rated (self-extinguishing) and impervious to moisture, making it ideal for basements or humid areas.
• VPI (Vacuum Pressure Impregnated): An alternative "open-wound" design using Class H varnish. This option is lighter and allows for easier recycling at the end of life, often preferred for green building certifications or retrofits with strict weight limits.

Step-Up Configuration for Distributed Energy

For indoor cast-resin transformer duty, step-Up Configuration for Distributed Energy is treated as a practical design and selection point rather than generic catalog wording.

• Beyond standard step-down duties, this unit is frequently deployed as a dry type step up transformer.
• Application: It is perfectly sized to connect 400kW-500kW rooftop solar arrays or natural gas cogeneration engines (CHP) to the 11kV medium voltage grid.
• Engineering: In this "reverse" mode, the transformer is designed with low inrush current geometry and reinforced insulation on the secondary side to handle the voltage spikes typical of inverter-based generation sources.

Technical Data Sheet

Technical Data Sheet provides selection data that helps compare ratings, voltage classes, and installation requirements.

• Technical Parameter.
• Specification / Options.
• 4160V / 6.6kV / 11kV / 33kV.
• 400V / 480V / 600V.
• Cast Resin (Standard) or VPI (Option).
• Class F (155°C) or Class H (180°C).

Active Thermal Management

For indoor cast-resin transformer duty, active Thermal Management is treated as a practical design and selection point rather than generic catalog wording.

• Protection Logic: The unit comes equipped with PT100 sensors embedded directly into the hottest spot of the LV windings. These link to a relay that executes a staged response based on Class F limits: Alarm at 130°C (warning operators), Fan Start at 140°C (if equipped), and Trip at 155°C (disconnecting the load to prevent insulation damage).
• Maintenance Reality: Unlike oil units that require dielectric fluid sampling and gas analysis, this solid-state unit removes these variables. Maintenance is strictly mechanical: checking bolt torque and vacuuming dust from the air channels, drastically simplifying facility management schedules.

Installation and Load Context

Installation and Load Context connects the product rating with the field conditions, enclosure layout, and distribution role it is normally selected for.

• 500 kVA dry type transformer installed on commercial rooftop for.
• Solar energy grid integration.
• Commercial Incomer: Delivering approximately 720 Amps of continuous power, it is the standard specification for powering a typical 10,000 m² office building or a mid-sized data hall.
• Retrofit Projects: Specifically designed to fit through standard double-doors, making it the ideal replacement for aging, hazardous Askarel (PCB) filled transformers in older basement substations without requiring wall demolition.
• Distributed Generation: Acting as the grid-tie point for commercial rooftop solar installations, stepping up 400V inverter output to the 11kV distribution network.

Electrical and Mechanical Data

The table data is organized for quick rating comparison, project specification, and transformer selection.

Product Detail Images