15kV Eco-Integrated Node Switchgear Quick Connectors
Product Overview
The 15kV Eco-Integrated Node Switchgear Quick Connectors are dedicated quick-connection devices designed specifically for 10kV/15kV eco-friendly gas (nitrogen/dry air) insulated integrated node switchgear. They enable rapid mating between switchgear and bypass cables/transfer equipment, supporting live-line bypass operations, emergency power supply, and other scenarios where energized switchgear interface connections must be made without de-energization. These connectors are core accessory components for live-line operations on eco-friendly medium-voltage switchgear.
Product Features
Electrical and Insulation Performance
Employing an insulation structure design dedicated to eco-friendly switchgear, compatible with nitrogen/dry air insulating environments, the connectors exhibit excellent insulation performance. They can withstand the rated system voltage of 15kV as well as transient overvoltages, meeting the operational requirements of a maximum working voltage of 17.5kV, with partial discharge level ≤10pC (at 1.5U₀).
The built-in high-purity copper conductive inner core delivers outstanding electrical conductivity and extremely low contact resistance, capable of carrying rated currents of 250A/630A with no heating or oxidation during long-term operation, satisfying the demands of high-current bypass power supply.
The integrated electric field optimization structure and insulating shields uniformly distribute the interface electric field and effectively suppress partial discharge. The connectors also provide superior gas-sealing performance to prevent leakage of eco-friendly gas from the switchgear, with no risk of electrical erosion or dielectric breakdown during long-term operation, ensuring stable and reliable electrical and sealing performance.
Structural and Safety Features
The standardized interface design strictly complies with industry standards for eco-friendly integrated node switchgear and is universally interchangeable with dedicated interfaces of mainstream 15kV eco-friendly gas switchgear, offering strong compatibility.
The monolithic modular structure incorporates a quick-lock connection mechanism requiring no additional tools, enabling rapid mating of switchgear and bypass equipment and significantly reducing the construction cycle of live-line operations.
A dual-function design integrates self-positioning anti-withdrawal retention and gas sealing. Upon complete interface installation, the mechanism automatically locks while simultaneously providing effective sealing of the eco-friendly gas inside the switchgear, preventing loosening, dislodgement, and gas leakage during operation, thereby enhancing system safety.
Full insulation protection design provides high outer insulation strength, allowing direct contact with the housing during energized operation without risk of electric shock, ensuring the safety of operations and maintenance personnel.
Environmental and Weather Resistance
Excellent weatherability enables adaptation to a wide temperature range of -40°C to +90°C. The conductive inner core and insulating components exhibit no degradation, cracking, or embrittlement at extreme temperatures, making the connectors suitable for both indoor and outdoor eco-friendly switchgear operation.
Moisture-proof, waterproof, pollution-resistant, and salt fog-resistant with an IP67 protection rating, the connectors operate reliably over the long term in harsh environments such as humid, dusty, and saline atmospheres, with no susceptibility to rainwater or condensation corrosion. They are simultaneously compatible with nitrogen/dry air insulating environments with no risk of gas leakage.
Anti-aging and anti-corrosion properties are ensured by tin/silver plating on the conductive inner core surface to prevent oxidation and corrosion, while the insulating components are fabricated from materials resistant to eco-friendly gases. Service life exceeds 10 years with maintenance-free operation, reducing long-term operational and maintenance costs.
Mechanical and Compatibility Features
High mechanical strength with impact and vibration resistance allows the connectors to withstand mechanical stresses encountered during transportation, installation, and operation, with no risk of deformation or damage, making them suitable for complex field working environments.
Compatible with the dedicated interfaces of 10kV/15kV eco-friendly integrated node switchgear, nitrogen-insulated ring main units, dry air-insulated compact substations, and similar equipment, the connectors offer strong universality and can be used in conjunction with mainstream bypass cables, transfer cables, and shunt devices.
The modular design supports repeated insertion and withdrawal, with convenient maintenance and reduced equipment investment costs for live-line operations.
Technical Parameters
| Parameter Category | Item | Specification |
| Rated Electrical Parameters | System Voltage (Un) | 10kV/15kV |
| | Rated Voltage (Ue) | 15kV | |
| | Maximum Working Voltage (Um) | 17.5kV | |
| | Rated Frequency (fn) | 50Hz/60Hz | |
| | Power Frequency Withstand Voltage | 42kV/5min (dry test), no breakdown, no flashover | |
| | Lightning Impulse Withstand Voltage | 95kV (peak), no breakdown, no flashover | |
| | Partial Discharge Level | ≤10pC (at 1.5U₀) | |
| | Rated Current Rating | 250A/630A (selectable) | |
| | Rated Short-Circuit Withstand Current | 20kA/2s, 25kA/2s (selectable) | |
| | Contact Resistance | ≤20μΩ | |
| Structural and Material Parameters | Main Body Material | Tin/silver-plated copper (conductive inner core), eco-friendly gas-resistant insulating material (insulating components), stainless steel (locking mechanism/flange) |
| | Protection Rating | IP67 | |
| | Interface Standard | Compatible with dedicated interfaces of 15kV eco-friendly integrated node switchgear, conforming to industry standards | |
| | Compatible Equipment | 10kV/15kV eco-friendly integrated node switchgear, nitrogen/dry air-insulated ring main units, bypass cables, transfer cables, etc. | |
| | Sealing Performance | Compatible with nitrogen/dry air insulating environments; no risk of gas leakage | |
| Environmental Parameters | Applicable Altitude | ≤2000m (high-altitude customization available) |
| | Ambient Temperature | -40°C to +90°C (operating), -40°C to +70°C (storage) | |
| | Relative Humidity | ≤100% (non-condensing) | |
| | Seismic Rating | Grade 8 | |
| Applicable Standards | GB/T 12706, DL/T 1476 Preventive Test Regulations for Electrical Safety Tools and Equipment, DL/T 814 Distribution Automation Terminal, GB 3906 3.6kV~40.5kV AC Metal-Enclosed Switchgear and Controlgear |
Application Scope
Applicable voltage levels: 10kV/15kV AC medium-voltage distribution systems, compatible with eco-friendly gas-insulated switchgear rated for a maximum working voltage of 17.5kV.
Applicable operating scenarios:
Live-line maintenance and retrofit operations on 10kV/15kV eco-friendly integrated node switchgear and nitrogen/dry air-insulated ring main units, enabling rapid mating between switchgear and bypass cables to establish temporary bypass power supply circuits;
Live-line bypass operations on urban distribution network eco-friendly switchgear distribution lines, industrial and mining enterprise distribution systems, and new energy (photovoltaic/wind power) step-up station eco-friendly switchgear equipment;
Emergency power supply and live-line maintenance operations on eco-friendly switchgear in indoor/outdoor distribution rooms, compact substations, and similar installations.
Functional purpose: To achieve insulated isolation and conductive connection between eco-friendly integrated node switchgear and bypass operation equipment, while maintaining the sealing integrity of nitrogen/dry air inside the switchgear, providing a safe and reliable connection solution for live-line bypass operations on eco-friendly medium-voltage distribution system switchgear.
Operating Conditions
Normal Operating Conditions
Altitude: ≤2000m
Ambient temperature: -40°C to +90°C; equipment operating temperature complies with relevant standards
Relative humidity: ≤100% (non-condensing)
Environmental conditions: free from corrosive gases, flammable/explosive media, and severe vibration or shock
Installation method: Flange-mounted to the eco-friendly switchgear interface, with the opposite end directly plug-connected to the bypass equipment interface. Both horizontal and vertical mounting orientations are permissible; installation space must accommodate plug/unplug operations and flange mounting requirements.
Special Operating Conditions (Customization Required)
Altitude exceeding 2000m
Ambient temperature outside the range of -40°C to +90°C
Severely polluted, saline, or chemically corrosive environments
High vibration or high-impact duty conditions
Non-standard interface configurations or special current rating requirements
Installation and Maintenance
Installation Requirements
Before installation, inspect the product appearance for cracks, damage, and voids; verify that insulating components are undamaged. Check that the conductive inner core, locking mechanism, and sealing components are free of rust and deformation, that the locking mechanism operates smoothly and reliably, and that sealing components show no aging or deterioration.
Clean the inner surface of the eco-friendly switchgear interface and the connector surface, removing grease, dust, and foreign matter, and ensure the interface is dry and clean. Clean the bypass equipment interface surface, removing grease, dust, and foreign matter, and ensure the interface is dry and clean.
Apply a uniform coating of dedicated silicone grease lubricant to the outer surface of the connector interface to prevent damage to the insulation layer and sealing components during installation.
Secure the connector to the eco-friendly switchgear interface via the flange, tightening bolts to the specified torque. Reliably connect the opposite end of the connector to the bypass equipment interface, ensuring full seating, then engage the positioning anti-withdrawal locking mechanism. After installation, verify there is no looseness or misalignment.
Upon completion of installation, perform insulation resistance testing, power frequency withstand voltage testing, and gas seal testing; the unit may be placed into service only upon passing all tests.
Maintenance Requirements
Periodically inspect the product appearance for cracks, damage, discharge marks, and contamination accumulation; verify that the connections to the switchgear interface and bypass equipment interface are secure with no looseness; check that flange bolts show no loosening or corrosion and that sealing components show no aging or deterioration.
Periodically test insulation resistance and contact resistance, and simultaneously check the gas pressure inside the switchgear to ensure performance meets requirements and to detect potential faults in a timely manner.
Clean the product surface and interfaces, removing dust and contamination; maintain insulating surfaces in a dry and clean condition, avoiding corrosion from grease and chemical substances.
If the product exhibits anomalies such as cracking, damage, discharge, overheating, out-of-specification contact resistance, or gas leakage, immediately take it out of service and replace it; operation of a defective unit is strictly prohibited.
Plug/unplug interface operations must be performed using dedicated insulating operating tools; manual operation of energized interfaces with bare hands is strictly prohibited, and the distribution safety regulations must be strictly observed during all operations.
Safety Precautions
The product must be installed, commissioned, and maintained by qualified electrical professionals holding medium-voltage live-line operation credentials; operation by non-qualified personnel is strictly prohibited.
The product must be used in conjunction with eco-friendly switchgear and bypass operation equipment of the corresponding specifications. Use with equipment of different voltage ratings or current ratings is strictly prohibited, as this will result in insulation failure, safety incidents, or gas leakage.
Unauthorized disassembly or modification of the product is prohibited and will void the warranty and safety certification. Use of non-dedicated tools to force installation or removal of interfaces and flanges is strictly prohibited.
During installation, damage to insulating surfaces and sealing components is strictly prohibited. Silicone grease lubricant must be applied uniformly to avoid compromising insulation performance and sealing effectiveness. Flange mounting bolts must be tightened to the specified torque to prevent loosening that could result in terminal movement, interface loosening, or gas leakage.
During storage, the product must be kept in a dry, ventilated, and cool environment, protected from direct sunlight, high temperatures, humidity, and compression. Contact with sharp objects that could damage insulating components and sealing components is strictly prohibited.
When performing plug/unplug operations on energized interfaces, distribution safety regulations must be strictly followed, appropriate safety protective measures must be implemented, and unauthorized operations are strictly prohibited.
Model Designation
| Model Identifier | Description |
|---|---|
| 15kV | Applicable system voltage rating; rated voltage 15kV, maximum working voltage 17.5kV |
| Eco-Integrated Node Switchgear Quick Connectors | Quick connectors for eco-friendly integrated node switchgear, used for rapid mating between eco-friendly gas-insulated switchgear and bypass operation equipment |
| 250A/630A | Rated current rating; compatible with 250A/630A current loads respectively |
Applicable Standards and Certifications
International Standards: IEC 60840 Power Cables with Extruded Insulation and Their Accessories for Rated Voltages above 30kV (Um=36kV) up to 150kV (Um=170kV — Test Methods and Requirements; IEC 62271-200 High-Voltage Switchgear and Controlgear — Part 200: AC Metal-Enclosed Switchgear and Controlgear for Rated Voltages above 1kV and up to and including 52kV.
National Standards: GB/T 12706 Power Cables with Extruded Insulation and Their Accessories for Rated Voltages from 1kV (Um=1.2kV) to 35kV (Um=40.5kV); GB 3906 3.6kV~40.5kV AC Metal-Enclosed Switchgear and Controlgear; DL/T 1476 Preventive Test Regulations for Electrical Safety Tools and Equipment.
The product has passed type testing by the National High-Voltage Electrical Apparatus Quality Supervision and Inspection Center and complies with national power industry standards.
After-Sales Service
Product warranty period: 18 months from the date of manufacture, or 12 months from the date of commissioning, whichever comes first.
Within the warranty period, products with quality defects are repaired or replaced free of charge.
Technical support, installation guidance, and customization services (special specifications and special operating condition adaptations) are provided.
Documentation Notice
The technical parameters in this manual are based on standard operating conditions. Special operating conditions require customization based on actual requirements. The product technical agreement and type test report shall prevail as the final authoritative reference.
Appendix: Product Outline Drawing
