YB27 American-Style Pad-Mounted Transformer
This series of American-style compact substations features a highly integrated design; its volume is merely one-fifth to one-tenth that of domestic European-style compact substations of equivalent capacity, thereby significantly reducing the required footprint. The equipment employs a fully sealed and fully insulated structural design, eliminating the need for safety clearance distances and comprehensively safeguarding the personal safety of operators. The high-voltage wiring system supports both ring-network and terminal power supply configurations, offering exceptional flexibility. Furthermore, the product accommodates a wide range of low-voltage feeder requirements and supports customized designs, effectively balancing high safety performance with economic investment efficiency.
Description
Product Technical Advantages
1. High Safety and Full Insulation: Featuring a fully sealed and fully insulated physical structure, the unit requires no additional safety clearance distances, thereby providing reliable protection for personnel safety.
2. Flexible Wiring and Power Supply: The high-voltage connection terminals are adaptable for use in both ring-network power supply systems and terminal power supply systems, offering flexible switching between power supply modes and ensuring high equipment reliability.
3. Superior Electrical Performance: The transformer core exhibits characteristics of low loss, low noise, and low temperature rise; it possesses strong overload capacity and demonstrates excellent resistance to short circuits and electrical surges.
4. Versatile Cable Terminations: Cable terminations are available in two options: 200A elbow connectors or 600A “T-type” fixed connectors. Both options can be equipped with fully insulated zinc oxide surge arresters; notably, the 200A cable connectors support load-break switching and can also function as disconnect switches.
5. Compact, Economical, and Space-Saving: The overall structure is extremely compact, featuring significantly reduced dimensions that effectively minimize the civil engineering footprint and initial investment costs of the project.
Technical Parameters
Product Model: YB27 Prefabricated Substation
| Item | Unit | Parameter 1 | Parameter 2 |
| Rated Voltage | kV | 12 | 40.5 |
| Rated Current | A | 200 | 630 |
| Rated Frequency | Hz | 50 | |
| Rated Short-time Withstand Current (Thermal Stability) | kA/s | 16/4 | 16/2 |
| Insulation Level Power Frequency Withstand Voltage (Break) | kV 1min | 42/48 | 95/115 |
| Insulation Level Impulse Withstand Voltage (Break) | kV 1min | 75/85 | 95/115 |
| Short-circuit Making Current | kA | 40 | |
| Load Operation Times | Bout | 100 | |
| Mechanical Life | Bout | 3000 | |
| Altitude | m | ≤2000 | |
| Protection Level | IP33-IP54 | ||
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