YJZGGC Plug Dry Type GIS Termination
Our company produces two main YJZGGC plug dry type GIS termination, YJZGGCD short plug dry GIS termination and 4E-YJZGGCC long plug dry GIS termination, widely used for GIS electrical equipment and cable connections. They are composed of outer power, epoxy casting, prefabricated stress cone, cone prop, and tail tube. 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. Epoxy is using epoxy resin vacuum casting molding, cone roof tight plug-dry structure. There's no need to fill insulating gas or oil, effectively ensure the long-term safe operation of the product. Our product is using multiple sealing structure which can effectively prevent the leakage of water immersion. All of the seals are using imported NBR or silicon rubber material. All of the fastener raw-material are stainless steel with good waterproof seal performance.
Our products meet the standards of IEC60859 (1999), IEC62271-209 (2007) in accordance with GIS electrical equipment. There are a little differences between the two standards, if users do not require in writing, generally based on the standard of IEC62271-209.
- Pluggable rod 2. Locking sleeve 3. Stress cone 4. Epoxy bushing 5. Cone support 6. Spring attachment 7. Tail pipe 8. Cable
|
Size mm |
48/66kV |
64/110kV |
80/138kV |
127/220kV |
L Short type |
310 |
470 |
470 |
620 |
A Short type |
900 |
1020 |
1020 |
1260 |
L Long type |
583 |
757 |
757 |
960 |
A Long type |
1200 |
1310 |
1310 |
1600 |
Main structure features:
Advanced structure: fully sealed plug dry-type structure, can firstly send epoxy casting and plugging to the GIS equipment factory and pre-installation it in the GIS equipment.
Easy installation: the length of plug-in structure of the cable is less than 300mm, dry-type with oil-free and gas free, greatly reducing the labor.
Type test and pre-identification test on 66~220kV cable accessories:
Item |
Test requirement |
Test type |
Products type |
48/66 |
64/110 |
127/220 |
Porcelain bushing |
Composite busing |
GIS termination |
Straight through/ Insulating joint |
Soft dry type termination |
Sealing fittings, porcelain bushing, composite bushing |
0.25±0.01MPa/1h, no leakage |
R |
P |
P |
P |
- |
- |
Epoxy bushing |
0.6~0.7MPa/1h, no leakage |
Prefabricated body partial discharge test |
72kV |
96kV |
190kV |
R |
P |
P |
P |
P |
P |
Partial discharge in the background |
|
|
Prefabricated body power frequency withstand voltage test |
120kV |
160kV |
318kV |
R |
P |
P |
P |
P |
P |
30min, no flashover no breakdown |
Partial discharge test at ambient temperature |
72kV |
96kV |
190kV |
T |
P |
P |
P |
P |
P |
Partial discharge in the background |
Thermal cycling voltage test |
96kV |
128kV |
254kV |
T |
P |
P |
P |
P |
P |
20 cycles, no flashover no breakdown |
Partial discharge at high temperature |
72kV |
96kV |
190kV |
T |
P |
P |
P |
P |
P |
Partial discharge in the background |
Lighting impulse voltage test and the subsequent power frequency withstand voltage test |
450kV |
550kV |
1050kV |
T |
P |
P |
P |
P |
P |
10 times, no flashover no breakdown |
120kV |
160kV |
318kV |
|
|
15min, no flashover no breakdown |
|
|
Immersion voltage test on outer protective sheath of direct-buried joint |
60/75kV impact both ends, 30/37.5kV impact one end to the ground |
60/95kVimpact both ends, 30/47.5kV impact one end to the ground |
T |
- |
- |
- |
P |
- |
Sealing test after installing accessories |
0.25±0.01MPa/1h, no leakage |
T |
P |
P |
P |
P |
P |
Outdoor termination frequency voltage test in rain |
140kV |
185kV |
460kV |
T |
P |
P |
- |
- |
P |
1min, no flashover no breakdown |
|
|
Post insulator voltage test |
20kV/1min, no flashover no breakdown |
T |
P |
P |
- |
- |
- |
Outdoor termination radio interference test |
61kV |
81kV |
140kV |
A |
P |
P |
- |
- |
P |
1MHz radio interference, voltage≤450μV |
1MHz radio interference, voltage≤500μV |
Accessories sample test |
Detect accessories system, no significant errors effect operating |
T |
P |
P |
P |
P |
P |
DC voltage test |
/ |
20kV/1min between inner conductor and metallic screen of joint, no breakdown |
T |
- |
- |
- |
P |
- |
Conductor connecting pole (tube) pressure welding fitting performance test |
After crimping, the total resistance is not 1.2 times more than the same length and cross sectional area of conductor |
T |
P |
P |
P |
P |
P |
Type test report and KEMA report for 1kV to 220kV cable accesories
TEST AND PRODUCTION EQUIPMENT
1000kV ultra-high voltage test hall, 500kV high voltage test hall, fully automatic rubber injection molding system, 100000 level dust-free workshop
COMPANY PROJECTS
Our company's business and services span across dozens of provinces and cities nationwide, and we also export to international markets, including Australia, Peru, South Africa, Russia, the United States, Cyprus, New Zealand, Bangladesh, Tanzania, and more. We have gained significant recognition and reputation both domestically and internationally. In recent years, the company has been continuously enhancing its quality management and service systems. We are not content with our current achievements; instead, we strive for continuous progress, consistently reaching new milestones.