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.
One piece pre-molded straight joint/sectionalizing joint
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
The main body is a monolithic prefabricated structure, i.e. insulation, shielding and stress cone in one piece.
The stress cone is made of imported liquid silicone rubber injection molding, with a long and stable holding force and electric field uniformity.
Compact structure, small size, light weight, easy to install.
The shell is protected by an insulated, magnetically isolated metal protection box with good mechanical properties and good sealing.
Structure & Size
1,glass fiber
2,copper shell
3,stress cone
4,insulation of cable
5,epoxy insulating insulation
6,connecting pipe
7,shielding tiles
8,prefabricated body
9,coaxial cable
10,cable
| Size / mm |
38/66kV |
50/66kV |
64/110kV |
76/132kV |
127/220kV |
| L |
1300 |
1300 |
1500 |
1500 |
1800 |
| A |
1900 |
1900 |
2100 |
2100 |
2400 |
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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