Reduction cost of catenary

Complete electrification or partial electrification:

1a. If you want to electrify lines with gauge constraints, how do you do to manage them concerning tunnels

1b. If you want to electrify lines with gauge constraints, how do you do to manage them concerning bridges

2. Do you rebuild to get the right electrification gauge and the right clearance or do you have other solutions?

3a. Do you accept to diverge from standardized requirements on reduced insulation?

Yes

No

4a. Do you accept other overhead contact line (OCL) gap where the gauge is not sufficient enough, where the clearance is not right ?

Yes

No

6. What kind of technical solutions do you have to reduce the construction cost of OCL (CAPEX)?

Foundation

Structures

Others

Others

7c. What would be the perfect track operating stop to perform the work?

Closing of the lines?

Work during night?

Short interruption?

8a. When renewing, do you rebuild completely?

Yes

No

9. If the contact wire is not too weared, do you reuse the contact wire on other lines (ie lower traffic)?

Clamps?

Bars?

Cantilever?

Other OCL equipment?

Other OCL equipment?

Power supply:

10a. Do you have also good practices towards substations on traction power supply?

10b. - What do you think about switching off transformers when not needed?

11. What are your ideas to reduce the CAPEX?

12. Do you recycle?

13. Do you monitor transformer? If yes, how (IoT’s….)?

14. Would you accept to change your voltage system into a more energetic efficient one from 1,5 kV to 3 KV, from DC to AC or from 3 kV to possible future 6kV, 9 kV DC?

15a. Which idea would you recommend to reduce cost of electrification? please indicate us if you want to share the answers or not

15b. Could you give your ideas a number corresponding to the chart below (efficient to very efficient and difficult to do to very easy to do)? (copie)

16a. In the beginning of this survey, nine good practices were briefly presented, what do you think of them?

16b. Could you rate your recommendations using the matrix given below?

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