China S□ Series 6-10kV Oil-Immersed Power Transformer for Factories - Efficient Solutions from Top Suppliers
China S□ Series 6-10kV Oil-Immersed Power Transformer for Factories - Efficient Solutions from Top Suppliers
Product Model
1 S – Three-phase | D – Single-phase | Z – On-load tap-changer | F – Air-cooled.
2 Model series: S22, S20, S13, S11.
3 M – Fully sealed | R – Rolled iron core.
4 GY – Plateau | WF – Corrosion Protection | TA – Dry Tropics | TH – Wet Tropics (not marked if none).
5 NX1 – Energy Efficiency 1 | NX2 – Energy Efficiency 2 | NX3 – Energy Efficiency 3 (Energy Efficiency 3 is generally not labeled).
Schematic Diagram of the Appearance
Frequently Asked Questions (FAQ)
Q
What does the "S" prefix in the S-Series transformer model name indicate?
A
The "S" prefix indicates a three-phase transformer. Other prefixes such as "D" denote single-phase configurations, allowing users to quickly identify the transformer type from the model code.
Q
What is the difference between S22, S20, S13, and S11 model series?
A
These designations refer to different design generations and performance standards of the S-Series transformers. Higher numbers generally represent newer designs with improved energy efficiency and lower no-load losses.
Q
What does the "Z" suffix mean in the transformer model code?
A
The "Z" suffix indicates that the transformer is equipped with an on-load tap-changer, which allows voltage ratio adjustment while the transformer remains energized and under load — without interrupting service.
Q
What special environmental conditions can the S-Series 6-10kV transformer be adapted for?
A
The transformer can be adapted for high-altitude plateau conditions (GY), corrosion-resistant environments (WF), dry tropical climates (TA), and wet tropical climates (TH). If none of these apply, no special suffix is added to the model code.
Q
What do the energy efficiency labels NX1, NX2, and NX3 represent?
A
NX1, NX2, and NX3 represent Energy Efficiency Levels 1, 2, and 3 respectively. Level 1 (NX1) is the highest efficiency rating. Energy Efficiency Level 3 (NX3) is generally not labeled in the model code as it is the baseline standard.
Q
What is the difference between a fully sealed (M) and a rolled iron core (R) transformer?
A
A fully sealed transformer (M) uses a hermetically sealed tank that prevents oil oxidation and moisture ingress, reducing maintenance requirements. A rolled iron core transformer (R) uses a wound core design that offers lower no-load losses and quieter operation compared to traditional stacked core designs.