# Rail traction and Transformers and power electronics

Their prices have moved together.

Source page: https://www.materialinsights.org/links/rail-traction-and-transformers-and-power-electronics/

[Rail traction](https://www.materialinsights.org/energy/e_rail_traction/) (energy) and [Transformers and power electronics](https://www.materialinsights.org/energy/e_power_electronics/) (energy): 1 relationship.

## How they are linked

### 1. Price link: traction converters

*Cost and price · Weak · Both ways*

Electric trains use transformers and converters to feed their motors from overhead wires. Monthly moves correlate at 0.17 and yearly at 0.29 with the transformer index, a weak link from shared electrical equipment costs.

- **0.17** monthly change correlation
- **0.29** 12-month change correlation
- **0.22** fitted elasticity

Built from the site data on production routes, energy flows, industry value chains, input-output tables and prices.