Conductor cross-sectional area (mm²)

Design serial number

35-70

1

95-150

2

185-300

3

400-500

4

630

5

800

6

1000

7

1200

8

1400

9

1600

10

1800

11

2000

12

Project

Test Items

Standard requirements

Test Results

Conclusion

26/35kV Silicone Rubber Cold Shrinkable Indoor/External Terminal Head Intermediate Joint

Power frequency withstand voltage test (wet state)

105kV, 1min no flashover, no breakdown

105kV, 1min, each phase of the combined sample has no flashover and no breakdown

Pass

Partial discharge test

39kV discharged power ≤ 5pc

39kV discharged power ≤ 5pc

Pass

Load cycle test

The conductor is heated to 95 ℃, each cycle is 8h, of which heating is 5h and cooling is 3h, a total of three cycles

Complete three load cycle tests as per standard requirements

Pass

Partial discharge test

39KV decentralized power ≤ 5pc

39kV discharged power ≤ 5pc

Pass

Lightning impulse voltage test

± 250kV 10 times each, no breakdown, no flashover

± 250KV 10 times each, each phase of the combined sample has no flashover and no breakdown.

Pass

Negative polarity DC withstand voltage test

156kV, 15min no flashover, no breakdown

156kV, 15min, each phase of the combined sample has no flashover and no breakdown.

Pass

4h power frequency withstand voltage test

104kV, 4h no flashover, no breakdown

104kV, 4h, each phase of the combined sample has no flashover and no breakdown.

Pass