Item

Test Items

Standard requirements

Test Results

Conclusion

Prefabricated (cold-shrinkable) outdoor terminal/intermediate joint for 27.5kV electrified railway

Power frequency withstand voltage test

124kV, 5min no flashover, no breakdown

124kV, 5min, no breakdown or flashover of the combined sample

Pass

Power frequency withstand voltage test under rain

110kV, 1min no flashover, no breakdown

110kV, 1min, no breakdown or flashover of the combined sample

Pass

Partial discharge test at room temperature

48kV discharged power is not more than 5pc

The discharge capacity of each phase of the combined sample at 48kV is not more than 1.7pc.

Pass

Impulse voltage test at high temperature

± 250kV 10 times each without breakdown or flashover

± 250KV 10 times each. No breakdown or flashover of each phase of the combined sample

Pass

Constant pressure load cycle test in air

69kV voltage and conductor heating to temperature 90-100 ℃. A total of 60 cycles without breakdown and flashover

69kV voltage and conductor temperature 90-100 ℃, a total of 60 cycles, the combination of samples are not broken down, not flashover

Pass