Table of Contents
Understanding Power Transformers
| Type | Rated capacity (KVA) | Voltage combination(KV) | No-load losses(W) | Load losses(W) | No-load current (%) | Short-circuit impedance (%) |
| SZ11-2000 | 2000 | 33,35/6.3,6.6,10.5,11 | 2300 | 19240 | 0.80 | 6.5 |
| SZ11-2500 | 2500 | 33,35/6.3,6.6,10.5,11 | 2720 | 20640 | 0.80 | 6.5 |
| SZ11-3150 | 3150 | 33,35/6.3,6.6,10.5,11 | 3230 | 24710 | 0.72 | 7.0 |
| SZ11-4000 | 4000 | 33,35/6.3,6.6,10.5,11 | 3870 | 29160 | 0.72 | 7.0 |
| SZ11-5000 | 5000 | 33,35/6.3,6.6,10.5,11 | 4640 | 34200 | 0.68 | 7.0 |
| SZ11-6300 | 6300 | 33,35/6.3,6.6,10.5,11 | 5630 | 36800 | 0.68 | 7.5 |
| SZ11-8000 | 8000 | 33,35/6.3,6.6,10.5,11 | 7870 | 40600 | 0.60 | 7.5 |
| SZ11-10000 | 10000 | 33,35/6.3,6.6,10.5,11 | 9280 | 48100 | 0.60 | 7.5 |
| SZ11-12500 | 12500 | 33,35/6.3,6.6,10.5,11 | 10940 | 56900 | 0.56 | 8.0 |
| SZ11-16000 | 16000 | 33,35/6.3,6.6,10.5,11 | 13170 | 70300 | 0.54 | 8.0 |
| SZ11-20000 | 20000 | 33,35/6.3,6.6,10.5,11 | 15570 | 82800 | 0.54 | 8.0 |
Power transformers play a crucial role in the transmission and distribution of electrical energy. These devices are designed to transfer electrical energy between two or more circuits through electromagnetic induction. They are essential for stepping up or stepping down voltage levels, ensuring that electricity can be transmitted efficiently over long distances.
| Type | Rated capacity (KVA) | Voltage combination(KV) | No-load losses(W) | Load losses(W) | No-load current (%) | Short-circuit impedance (%) |
| SCH15-30 | 30 | 6,6.3,6.6,10,11/0.4 | 70 | 710 | 1.6 | 4.0 |
| SCH15-50 | 50 | 6,6.3,6.6,10,11/0.4 | 90 | 1000 | 1.4 | 4.0 |
| SCH15-80 | 80 | 6,6.3,6.6,10,11/0.4 | 120 | 1380 | 1.3 | 4.0 |
| SCH15-100 | 100 | 6,6.3,6.6,10,11/0.4 | 130 | 1570 | 1.2 | 4.0 |
| SCH15-125 | 125 | 6,6.3,6.6,10,11/0.4 | 150 | 1850 | 1.1 | 4.0 |
| SC(B)H15-160 | 160 | 6,6.3,6.6,10,11/0.4 | 170 | 2130 | 1.1 | 4.0 |
| SC(B)H15-200 | 200 | 6,6.3,6.6,10,11/0.4 | 200 | 2530 | 1.0 | 4.0 |
| SC(B)H15-250 | 250 | 6,6.3,6.6,10,11/0.4 | 230 | 2760 | 1.0 | 4.0 |
| SC(B)H15-315 | 315 | 6,6.3,6.6,10,11/0.4 | 280 | 3470 | 0.9 | 4.0 |
| SC(B)H15-400 | 400 | 6,6.3,6.6,10,11/0.4 | 310 | 3990 | 0.8 | 4.0 |
| SC(B)H15-500 | 500 | 6,6.3,6.6,10,11/0.4 | 360 | 4880 | 0.8 | 4.0 |
| SC(B)H15-630 | 630 | 6,6.3,6.6,10,11/0.4 | 420 | 5880 | 0.7 | 4.0 |
| SC(B)H15-630 | 630 | 6,6.3,6.6,10,11/0.4 | 410 | 5960 | 0.7 | 6.0 |
| SC(B)H15-800 | 800 | 6,6.3,6.6,10,11/0.4 | 480 | 6960 | 0.7 | 6.0 |
| SC(B)H15-1000 | 1000 | 6,6.3,6.6,10,11/0.4 | 550 | 8130 | 0.6 | 6.0 |
| SC(B)H15-1250 | 1250 | 6,6.3,6.6,10,11/0.4 | 650 | 9690 | 0.6 | 6.0 |
| SC(B)H15-1600 | 1600 | 6,6.3,6.6,10,11/0.4 | 780 | 11730 | 0.6 | 6.0 |
| SC(B)H15-2000 | 2000 | 6,6.3,6.6,10,11/0.4 | 1000 | 14450 | 0.5 | 6.0 |
| SC(B)H15-2500 | 2500 | 6,6.3,6.6,10,11/0.4 | 1200 | 17170 | 0.5 | 6.0 |
The design and construction of power transformers require high-quality materials and precise engineering. A well-manufactured transformer can significantly improve the reliability of an electrical network. In China, various manufacturers specialize in producing these transformers, utilizing advanced technology and adhering to international standards.
The Role of 3 Phase Transformers
3 phase transformers are particularly important in industrial applications where three-phase power systems are prevalent. These transformers are capable of handling large amounts of power and provide a balanced load, which is vital for the efficient operation of machinery and equipment. By converting voltages between different levels, they ensure that power is distributed evenly across three phases.

In addition to their efficiency, 3 phase transformers offer redundancy and reliability in power supply. They are often used in conjunction with other equipment such as circuit breakers and switchgear to create a comprehensive power management system. Many Chinese manufacturers focus on producing high-quality 3 phase transformers that meet international certifications like ISO 9001 and ISO 14001.
Quality Assurance in Manufacturing
Quality assurance is a critical aspect of transformer manufacturing, particularly for companies seeking to compete on a global scale. ISO 9001 and ISO 14001 certifications are indicators of a manufacturer’s commitment to quality management and environmental sustainability. These standards help ensure that products are made consistently and responsibly, which is especially important for power transformers that must operate reliably under various conditions.

Chinese manufacturers have increasingly adopted these standards to enhance their competitiveness in the global market. By implementing strict quality control processes and continuous improvement practices, they can produce transformers that meet the rigorous demands of international customers. This focus on quality is evident in the growing number of videos showcasing manufacturing processes and product testing, allowing potential buyers to gain insights into the capabilities of these manufacturers.

