Introduction
Pad mounted transformers are widely used in power distribution. The selection involves a fundamental choice between two designs: the loop-type configuration, which connects to a backup grid to reduce outages, and the terminal-type configuration, which is supplied by a single power line. This selection determines the project's cost, the expected reliability of supply, and the ease of long-term maintenance.
Loop Type
The loop-type pad mounted transformer functions as an intelligent node in a loop distribution network. Its high-voltage side is equipped with two or more independent power inlets and loop load-break switches, which are used to achieve electrical interconnection, isolation, and rapid switching between multiple power sources during faults. This design allows the system to quickly reconfigure power supply paths in the event of grid abnormalities to ensure continuous operation of critical loads.
Terminal Type
The terminal-type pad mounted transformer is designed for radial power supply networks. With only one high-voltage inlet, it serves as the endpoint of a distribution line. This configuration aims to meet basic power supply requirements while balancing reliability and cost-effectiveness.
Technical Features:
Single power inlet with a simple and compact structure
Adopts a load-break switch and fuse combination for protection
Modular design for flexible and convenient installation
Relatively simplified operation and maintenance requirements
Application
| Configuration Type | Application Scenario | Key Considerations |
| Loop-Type Pad-Mounted Transformer | Critical Infrastructure | Downtime cost is extremely high; uninterrupted power supply is essential. |
| High-End Commercial & Financial Districts | Outages lead to significant commercial losses and reputational risks. | |
| Advanced Manufacturing Bases | Production continuity is critical; shutdowns result in massive losses. | |
| Integration with Unstable Public Grids | The loop configuration can serve as a critical entry point for internal microgrids, compensating for unreliable public grids while maintaining high reliability requirements. | |
| Terminal-Type Pad-Mounted Transformer | Standardized Residential Developments | Power supply reliability requirements are generally defined by local regulatory standards. |
| Light Industry & Warehousing Logistics | Reasonable fault restoration times are acceptable. | |
| Distributed Energy Access Points | These points are not core continuous load sources. | |
| Temporary or Phased Projects | Designed for potential future relocation or dismantling. |
About VKE Transformer
In the design of power distribution systems, the choice between loop-type and terminal-type pad mounted transformers ultimately comes down to selecting the most suitable solution for the project's specific requirements.
As a manufacturer, we always prioritize the actual application scenarios of our clients. For example, in a recent export case to Southeast Asia, we supplied three pad mounted transformers tailored to the local grid conditions.
Whether your project requires a highly reliable loop configuration or a cost-effective terminal solution, we can provide appropriate products and professional guidance. Feel free to contact us to discuss your specific needs.