What are the issues with selecting fault testers for medium voltage cables (6/10/35kV)?

1. What is the location of the faulty cable on site?
2. What is the voltage level of the cable?
3. Single core or triple core?
4. A single cable or a mixed line (a mixed line of overhead lines and cables? How many sections of cables with distribution boxes?)
If it is a mixed line, it is necessary to confirm the cable fault section;
5. What is the length of the pure fault cable (not the total length of the mixed line)?
6. How many years has the cable been in operation?
7. Is the cable path clear?
8. Cable burial method: direct burial, trench or conduit? How is the on-site environment (mountainous, urban...)?
9. Cable intermediate joint situation: quantity and location?
10. What is the condition of the cable terminal head (position of both ends, type of terminal head, and whether testing is allowed at both ends)?
11. Is there a malfunction during operation or during testing? If it is a fault in the experiment: What is the maximum withstand voltage of AC or DC?
12. Is it confirmed that the fault is with the cable rather than other electrical equipment?
13. Cable insulation status: Which phase is problematic? What is the insulation resistance?
14. Has any other manufacturer tested it on site? What's the general situation?
15. Is there an AC220 power supply or generator on site?
16. Do we need to wait for excavation?
17. Do we need to identify stab wounds?
18. Do you need us to provide joint production?
19. Is it necessary to perform DC or AC withstand voltage after fault repair?
20. Do terminal heads such as towers and iron towers need to provide wiring for customers' high-altitude personnel?