Introduction on Cable Accessories for 48/66~290/500kV
48/66kV~290/500kV high voltage cable accessories can be classified as porcelain bushing outdoor termination, composite bushing outdoor termination, full-prefabricated soft dry type outdoor termination, GIS termination, full-prefabricated silicone rubber straight through /insulating joint, assembled joint applied to any cross section, single-phase type and three-phase type for fully dry insulating branch joint, grounding box, and grounding protection box, interconnected box and sheath protector, etc.
4E-YJJTI,4E-YJJJI Fully Prefabricated Silicone Rubber Insulated Straight Through/Insulating Joint
The company produces two main 4E-YJJTI,YJJJI fully prefabricated silicone rubber insulated straight through/insulating joint, 4E-YJJTI and 4E-YJJJI, applied to connection between the two identical section or similar section of the cable. They are composed of prefabricated insulating body (stress cone included), metal protective shell, and fiberglass outer protective shell. The main body of prefabricated soft silicone rubber is using imported liquid silicone rubber injection rubber molding soft dry structure, which has long-term stability of lasting hold power and electric field uniform ability. Metal protective shell ring is composed with two different lengths of metal tail tube and insulating tuber, filled with insulating sealant inside, and covered with sealing insulation.
For different work environment and users' specified requirement, metal protective shell and fiberglass outlet shell are optional. Without water damage, mechanical damage, or corrosion, outer metal protective shell and fiberglass free are better for heart dissipation of the product to ensure a long life.
- Glass fiber reinforced plastics shell 2. Copper shell 3. Stress cone 4. Cable insulation 5. Epoxy insulating parts 6. Connecting tube 7. Screen tile 8. Prefabricated main body 9. Coaxial cable 10. Cable
|
| Size mm |
48/66kV |
64/110kV |
80/138kV |
127/220kV |
| L |
1600 |
1600 |
1632 |
1760 |
| A |
2000 |
2100 |
2200 |
2400 |
Main structure features:
Compact structure: silicone rubber parts is using fully prefabricated rubber insulator with small size compact structure, straight through and insulating joints share the same preform.
Easy installation: using advanced dual installation, one machine to expand, another shrinkable in connection cable, greatly improved installation efficiency, reducing the labor.
1-500kV Cable Accessories Electrical Performance Parameter
1~500kV cable accessories common parameters and factory test specification
Voltage levels provided by our company include 1kV, 10kV, 35kV, 48/66kV, 56/78kV, 64/110kV, 76/132kV, 127/220kV, and 290/500kV in accordance with IEC60502, IEC60840, IEC62067, IEC60859, IEC62271-209, GB/T11017, GB/Z18890, GB/T22078, GB/T12706, GB311, GB772, BS EN 50181, IEEE386, DL508, DL509, JB/T8144 standards, and pass through rigorous factory test, type test, and pre-identification test (220kV and above).
Test name and code
Test classifications and code:
| No. |
Test Name |
Code |
| 1 |
Routine test |
R |
| 2 |
Sampling test |
S |
| 3 |
Type test |
T |
| 4 |
Pre-identification test |
P |
| 5 |
Additional test |
A |
Routine test for each of the stress cone, GIS epoxy bushing, and straight through joint prefabricate main body of 66kV and above cable accessories:
| Item |
66kV |
110kV |
220kV |
| Partial discharge |
72kV, partial discharge not more than previously carried out items |
96kV, partial discharge not more than previously carried out items |
190kV, partial discharge not more than previously carried out items |
| Power frequency withstand voltage |
120kV/30min (joint main body 60min, no flashover no breakdown) |
160kV/30min (joint main body 60min, no flashover no breakdown) |
318kV/30min (joint main body 60min, no flashover no breakdown) |
| Seal test |
0.25±0.01MPa/1h for sealing fittings, porcelain bushing, composite bushing, no leakage |
| 0.6~0.7MPa/1h for epoxy bushing, no leakage |
| Appearance test |
No damage, no cracking and other defects that affect the quality and appearance |
*Straight through joint/insulation joint
*Product type/application range
Insulation joint: 4E-YJJJI type, straight through joint: 4E-YJJTI type
Rated voltage: 21/35kv, 26/35kv, suitable cross section: 25-800mm2
Rated voltage: 48/66kv, 56/77kv, 64/110kv, 76/132kv, suitable cross section: 185-1600sqmm
Rated voltage: 127/220kv, suitable cross section: 240-2500mm2
*Product Characteristics
The joint has an compact structure, easy to install. Long creeping distance for rubber insulation unit, suitable for the special humid area.
Outer protective shell adopts the structure of high-strength protective shell and waterproof insulation sealing. It has advantages of good mechanical protective, good sealing property and good anti-corrosion which will ensure the termination can be run safely on the bad weather condition.
Good anti-explosion property. No worry about the dangerous of fragment damage caused by accident .
To improve the waterproof property, it can provide glass fiber protection shell, pouring 8010 insulation paste inside.
1.Earthing ferrule
2.Earthing terminal
3.Copper protection shell
4.Pre-mould rubber insulation part
5.Epoxy insulation ring
6.Ferrule
7.Equivalent pressure sleeve
*Technical Data
Size of shape and installation
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