66-220kV High Voltage Cable Accessories
Our company provides the voltage level of 48/66kV, 64/110kV, 127/220kV and other series of cable accessories are all in accordance with IEC 60502, IEC 60840, IEC 62067, IEC 60859, IEC 62271-209, GB/T 11017, GB/T 18890, GB/T 12706, GB 311, GB 772, DL508, DL509, JB/T8144 and other standards, and have passed the stringent factory test, type test, pre-qualification test.
Termination with porcelation insulator
Scope of application
For cross linked polyethylene insulated power cables 240-3000mm2.
Suitable for large-scale chemical industry, iron and steel, power substations, coastal areas.
Features
Adoption of high-strength inorganic electric porcelain, stable performance
The stress cone is made of imported liquid silicone rubber injection molding, with a long and stable holding force and electric field uniformity.
Porcelain sleeve for the size of the umbrella structure, the whole outside the formation of a cone, has a very good anti-fouling flash, Weather resistance, anti-leakage marks, anti-electro-etching and water-repellent ability.
The terminal adopts multiple sealing structure to prevent water seepage and oil leakage during operation. water seepage and oil leakage phenomenon.
Structure & Size
1,wire clip (optional)
2,equalizing cover
3,core insulation
4,insulating oil
5,porcelain set
6,stress cone
7,fixed plate
8,support insulator
9,tail pipe
10,cable
| Size /mm |
48/66kV |
64/110kV |
80/138kV |
127/220kV |
| H |
1270 |
1500 |
1750 |
2500 |
| A |
1510 |
1935 |
2085 |
3100 |
| B |
1925 |
2155 |
2400 |
3600 |
| C |
450 |
450 |
450 |
650 |
| D |
200 |
200 |
200 |
300 |
| E |
Φ22 |
Φ22 |
Φ22 |
Φ32 |
| creepage distance |
≥2248 |
≥3906 |
≥4495 |
≥7812 |
Test Specification
All test classifications and codes:
| No.# |
Test Name |
Code |
| 1 |
Routine test |
R |
| 2 |
Sample test |
S |
| 3 |
Type test |
T |
| 4 |
Pre-qualification test |
P |
| 5 |
Additional test |
A |
The following routine tests are performed on stress cones, epoxy bushings of GIS terminals and prefabricated intermediate joints of each product at 66kV and above.
| Item |
Voltage |
| 38/66kV |
50/66kV |
64/110kV |
76/132kV |
127/220kV |
| Partial discharge |
54kV, no detectable local discharge over background |
72kV, no detectable local discharge over background |
96kV, no detectable local discharge over background |
114kV, no detectable local discharge over background |
190kV, no detectable local discharge over background |
| The power frequency withstand voltage |
90kV/30min |
125kV/30min |
160kV/30min |
190kV/30min |
318kV/30min |
| Sealing |
Seal fittings, porcelain bushings, composite bushings for 0.25±0.01MPa/1h, no leakage |
| The epoxy casing was subjected to 0.6~0.7MPa/1h with no leakage. |
| Appearance |
The products are free of damage, cracks, and other defects that may affect the quality and appearance of the products. |
66-220kV Main Test Parameters
| Item |
Standard |
Test Category |
Product Category |
| 48/66kV |
64/110kV |
127/220kV |
Porcelain Sleeve Terminal |
Composite Sleeve Terminal |
GIS terminal |
Straight / Insulated Joint |
flexible terminal |
| Sealing Fittings, Porcelain, Composite Sleeves |
0.25±0.01MPa/1h, no leakage |
R |
yes |
yes |
yes |
- |
- |
| Epoxy Sleeve |
0.6~0.7MPa/1h, no leakage |
| Partial discharge of prefabricated parts |
72kV |
96kV |
190kV |
R |
yes |
yes |
yes |
yes |
yes |
| Detects no more than background discharge |
| Frequency withstand voltage of prefabricated parts |
120kV |
160kV |
318kV |
R |
yes |
yes |
yes |
yes |
yes |
| 30min,no flashover, no breakdown |
| Partial discharge at room temperature |
72kV |
96kV |
190kV |
T |
yes |
yes |
yes |
yes |
yes |
| Detects no more than background discharge |
| Thermal cycling voltage test |
96kV |
128kV |
254kV |
T |
yes |
yes |
yes |
yes |
yes |
| 20 cycles, no flashover, no breakdown |
| Partial discharge test at high temperature |
72kV |
96kV |
190kV |
T |
yes |
yes |
yes |
yes |
yes |
| Detects no more than background discharge |
| Lightning impact test and subsequent frequency withstand voltage test |
450kV |
550kV |
1050kV |
T |
yes |
yes |
yes |
yes |
yes |
| 10 times for each positive and negative polarity |
| 120kV |
160kV |
318kV |
| 15min, no flashover, no breakdown |
| Directly buried joint outer protective layer immersion voltage test |
Two ends impact among the 60/75kV,an end of hit 30/37.5kV |
Two ends impact among the 60/95kV,an end of hit 30/47.5kV |
T |
- |
- |
- |
yes |
- |
| Sealing test after assembly of accessories |
0.25±0.01MPa/1h, no leakage |
T |
yes |
yes |
yes |
yes |
yes |
| Outdoor terminal rain frequency voltage test |
140kV |
185kV |
460kV |
T |
yes |
yes |
- |
- |
yes |
| 1min, no flashover, no breakdown |
| Pillar insulator voltage test |
20kV/1min, no flashover, no breakdown |
T |
yes |
yes |
- |
- |
- |
| Radio interference test for outdoor terminals |
61kV |
81kV |
140kV |
A |
yes |
yes |
- |
- |
yes |
| 1MHz radio interference, voltage ≤ 450μV |
1MHz radio interference, voltage ≤ 500μV |
| Accessory specimen test |
Visual inspection of accessory systems containing cables with no signs of deterioration that could affect the normal operation of the system |
T |
yes |
yes |
yes |
yes |
yes |
| DC voltage test |
/ |
No breakdown between conductor and metal shield in connector, 20kV/1min. |
T |
- |
- |
- |
yes |
- |
| Performance test of crimped connectors for conductor connecting rods |
The total area after crimping is not more than 1.2 times the resistance of an equal length of conductor of the same cross-section. |
T |
yes |
yes |
yes |
yes |
yes |
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