220kV Prefabricated Insulation Straight Connector
✅Integral Molding,full insulation,full sealing
✅Dynamic Electric Field Adaptation
✅High Reliability Testing
✅Easy Installation and maintenance free
- Product Introduction
Jinneng electric 220kV prefabricated insulation straight connector is a crucial component in the field of high-voltage power transmission. With an integral prefabricated insulation design, it combines various insulated parts in advance, ensuring reliable and stable insulation performance to withstand 220kV high voltage.
The internal conductor is firmly connected with excellent conductivity, and the external insulation layer tightly wraps around, effectively preventing leakage and flashover. In the power grid lines, it can efficiently connect cables, reduce line breaks, cut down power loss, and enhance the safety and stability of power transmission, being widely used in urban power grids and large-scale power transmission projects.
Model Meaning
Technical parameters
| Item | Parameter |
|---|---|
| Rated Voltage and Frequency | 120/220 kV, 50 Hz |
| Maximum Operating Voltage | 252 kV |
| Ambient Temperature Range | -40℃ to +40℃ |
| Maximum Conductor Temperature (Normal Operation) | 90℃ |
| Maximum Conductor Temperature (Short Circuit) | 250℃ |
| Applicable Cable Cross-Section | 240-2500 mm² |
| Maximum Altitude | ≤1000 m (Custom designs available for >1000 m) |
| Pollution Level | Suitable for heavily polluted areas (Class IV) and coastal high salt-fog regions |
| Partial Discharge Test (Ambient, 190 kV) | No detectable discharge at ≤5 pC sensitivity |
| Thermal Cycling Test (254 kV, 95-100℃, 8h heating/16h cooling) | Completed 20 cycles |
| Partial Discharge Test (High Temp, 190 kV) | No detectable discharge at ≤5 pC sensitivity |
| Impulse Voltage Test (±1050 kV, 95-100℃,10 times each) | No breakdown or flashover |
| Power Frequency Voltage Test (160 kV, 15 min) | No breakdown or flashover |
|
Sealing Test for Assembled Terminations a. Pressure Leakage Test (250±10 MPa, 1 h) b. Vacuum Leakage Increase Test (1 h) – Pressure Increment (B–A) |
No gas leakage 60pa |
Characteristics
●Main insulation of the product is the integral prefabricated structure,the high pressure shielding,the stress cone and the insulation piece are injected into a whole piece,the structure is simple,and the installation is convenient.
●Outer shielding layer of the main insulating piece is made of semi conductive silicone rubber,so as to avoid the defect that the spraying surface is easy to be damaged.
●Shell is made of high strength copper shell protection box, high mechanical strength,good sealing performance.
●Reinforced stress cone sealing design at terminals, achieving IP68 waterproof rating with pouring compound, suitable for harsh environments such as direct burial and high humidity.
Products Dimension
The size of 220kV prefabricated insulation straight connector
Typical Application Scenarios
● Incoming / outgoing lines of large substations, connecting substations and trunk cables to ensure reliable power supply under heavy loads.
● Urban underground utility tunnels, where dense cable laying requires high-reliability connection with waterproof, anti-corrosion and mechanical damage resistance.
● Industrial plants (chemical / iron and steel), ensuring continuous and stable power supply in high-humidity and corrosive environments.
● Cross-sea / cross-regional power transmission, relying on high-strength waterproof boxes to withstand complex environments in direct burial or underwater laying.
Certificate
New patent certificate/Design patent certificate, business license, expert workstation, production license, high-tech enterprise certificate, CE certificate, CCC certificate, SGS certificate, quality inspection report,and ISO9001,ISO14001,OHS18001, and other certifications.
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