15kV Quick Release Intermediate Connector
Product Overview
The 15kV Quick Release Intermediate Connector is a specialized rapid-connection device designed for live-line bypass operations in 10kV/15kV medium-voltage distribution systems. Both terminations feature standardized quick plug-and-pull interfaces, enabling rapid interconnection between two bypass cable sections to establish a temporary bypass power supply circuit. The device allows bypass circuit assembly and disassembly without de-energization, making it a core component for live-line bypass operations in medium-voltage distribution systems.
Product Features
Electrical and Conductive Performance
The device employs a high-purity copper conductive core with excellent conductivity and extremely low contact resistance, capable of carrying a rated current of 200A/630A. Long-term operation produces no overheating or oxidation, meeting the demands of high-current bypass power supply.
The conductive core utilizes an elastic contact structure with large contact area and uniform contact pressure, capable of withstanding frequent mating cycles while maintaining stable contact performance with no loosening or poor-contact risk.
An integrated electric field optimization structure ensures uniform field distribution at the interface, effectively suppressing partial discharge and preventing long-term electrical erosion or breakdown risk, ensuring stable and reliable electrical performance.
Structural and Safety Features
Both terminations adopt a standardized quick plug-and-pull interface design that strictly complies with industry standards, providing full interchangeability with mainstream 15kV bypass cables and quick-connect equipment. Strong compatibility accommodates bypass circuit configurations of various specifications.
The integrated modular structure incorporates a quick-lock connection mechanism that enables rapid interconnection and disconnection of two bypass cable sections without additional tools, significantly reducing bypass operation construction time.
A built-in positioning and retention structure automatically locks the interface upon full engagement, preventing loosening or disengagement during operation and improving circuit connection reliability.
Full insulation protection design with high outer insulation strength allows direct contact with the housing during operation without risk of electric shock, ensuring the safety of operations and maintenance personnel.
Environmental and Weather Resistance
Excellent weatherability accommodates a wide operating temperature range of -40°C to +90°C. The conductive core and insulation layer exhibit no performance degradation, cracking, or embrittlement at high or low temperatures, suitable for outdoor and indoor operating environments.
Moisture-proof, waterproof, contamination-resistant, and salt fog-resistant with IP67 ingress protection rating, enabling stable long-term operation in humid, dusty, and salt fog environments without susceptibility to rainwater or condensation.
Anti-aging and corrosion-resistant; the conductive core surface is tin-plated/silver-plated to prevent oxidative corrosion. Service life exceeds 10 years with maintenance-free operation, reducing long-term operations and maintenance costs.
Mechanical and Compatibility Features
High mechanical strength with impact and vibration resistance accommodates mechanical stresses encountered during transportation, installation, and operation without deformation or damage risk, suitable for complex field operating environments.
Compatible with 10kV/15kV bypass cables, bypass switches, transfer cables, and various other bypass operation equipment, offering strong universality and flexible combination to construct bypass circuits of varying lengths.
Modular design allows repeated plug-and-pull use with convenient maintenance, reducing equipment investment costs for bypass operations.
Technical Parameters
| Parameter Category | Item | Technical 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 | 200A/630A (selectable) | |
| | Rated Short-Circuit Withstand Current | 20kA/2s, 25kA/2s (selectable) | |
| | Contact Resistance | ≤20μΩ | |
| Structural and Material Parameters | Main Material | Tin-plated/silver-plated copper (conductive core), high-strength insulating material (housing), stainless steel (locking mechanism) |
| | Ingress Protection Rating | IP67 | |
| | Interface Standard | Both terminations are 15kV quick plug-and-pull interfaces compliant with industry standards for bypass operation equipment | |
| | Compatible Equipment | 10kV/15kV bypass cables, bypass switches, transfer cables, and other quick-connect bypass operation equipment | |
| Environmental Parameters | Applicable Altitude | ≤2000m (high-altitude versions available on request) |
| | 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 Instruments, DL/T 814 Distribution Automation Terminal |
Scope of Application
Applicable Voltage Level: 10kV/15kV AC medium-voltage distribution systems; suitable for bypass operations with a maximum working voltage of 17.5kV.
Applicable Operating Scenarios:
Rapid interconnection between two bypass cable sections for extending bypass circuit length during live-line maintenance and renovation operations on 10kV/15kV distribution lines and equipment;
Live-line bypass operations on urban distribution network cable lines, industrial and mining enterprise distribution systems, and new energy (photovoltaic/wind power) step-up substation distribution equipment;
Temporary bypass power supply circuit construction for distribution equipment in indoor/outdoor switchgear rooms, underground utility tunnels, cable tunnels, and other multi-scenario environments.
Functional Purpose: Provides insulation isolation and conductive connection between two quick-connect bypass cable sections, enabling rapid extension of bypass circuit length and delivering a flexible, efficient circuit construction solution for live-line bypass operations in medium-voltage distribution systems.
Operating Conditions
Normal Operating Conditions
Altitude: ≤2000m;
Ambient Temperature: -40°C to +90°C; equipment operating temperature complies with applicable standards;
Relative Humidity: ≤100% (non-condensing);
Environmental Conditions: no corrosive gases, no flammable or explosive media, no severe vibration or impact;
Installation Method: both terminations are directly plug-and-pull connected to their respective bypass cable interfaces; horizontal/vertical installation is acceptable; installation space must satisfy plug-and-pull operational requirements.
Special Operating Conditions (customization required)
Altitude exceeding 2000m;
Ambient temperature outside the range of -40°C to +90°C;
Severe contamination, salt fog, or chemical corrosion environments;
High-vibration or high-impact operating conditions;
Non-standard interface specifications or special current rating requirements.
Installation and Maintenance
Installation Requirements
Before installation, inspect the product for cracks, damage, and voids; verify the insulating housing is undamaged. Inspect the conductive core and locking mechanism for completeness, absence of corrosion and deformation, and confirm the locking mechanism operates smoothly and reliably.
Clean both interface surfaces and the corresponding bypass cable interface surfaces to remove grease, dust, and foreign matter; ensure interfaces are dry and clean.
Apply a uniform coat of approved silicone grease lubricant to the outer wall of the interfaces to prevent damage to the insulation layer during installation.
Connect both terminations of the product to their respective bypass cable interfaces securely, ensuring full engagement. Engage the positioning and retention mechanism; verify no looseness or misalignment upon completion.
After installation, perform insulation resistance testing and power frequency withstand voltage testing; the device may only be put into service upon satisfactory test results.
Maintenance Requirements
Periodically inspect the product for cracks, damage, discharge marks, and contamination buildup; verify the bypass cable interface connections are secure without looseness and the locking mechanism is free from corrosion and binding.
Periodically test insulation resistance and contact resistance to ensure performance meets requirements and to identify potential faults in a timely manner.
Clean the product surface and interfaces to remove accumulated dust and contamination; keep insulation surfaces dry and clean; prevent damage from grease and chemical substances.
If anomalies such as cracks, damage, discharge, overheating, or contact resistance exceeding limits are observed, immediately take the device out of service and replace it. Operation with known defects is strictly prohibited.
Plug-and-pull interface operations must be performed using dedicated insulated operating tools. Direct manual handling of energized interfaces is strictly prohibited; all operations must strictly comply with distribution system safety regulations.
Precautions
The product must be installed, commissioned, and maintained by qualified electrical personnel certified for live-line medium-voltage distribution operations. Operation by unqualified personnel is strictly prohibited.
The product must be used with bypass operation equipment of the matching specification. Mismatching equipment of different voltage ratings or current ratings is strictly prohibited, as this will result in insulation failure and safety incidents.
Unauthorized disassembly or modification of the product is prohibited; doing so will void the warranty and safety assurance. Forced installation or removal of interfaces using non-approved tools is strictly prohibited.
Damage to the insulation surface during installation is strictly prohibited. Silicone grease lubricant must be applied uniformly to avoid compromising insulation performance and sealing effectiveness. Interfaces must be fully locked into position to prevent overheating or discharge due to poor contact.
Store in a dry, ventilated, cool environment, away from direct sunlight, high temperatures, humidity, and compressive loads. Contact with sharp objects that may damage the insulation layer is strictly prohibited.
When connecting or disconnecting energized interfaces, strictly comply with distribution system safety regulations and implement all required safety precautions. Improper operations are strictly prohibited.
Model Designation
| Model Identifier | Meaning |
|---|---|
| 15kV | Applicable system voltage rating; rated voltage 15kV, maximum working voltage 17.5kV |
| Quick release intermediate connector | Quick-connect intermediate connector for rapid interconnection between two bypass cable sections |
Applicable Standards and Certifications
International Standard: IEC 60840 Test Methods and Requirements for Power Cables with Extruded Insulation and Their Accessories for Rated Voltages above 30kV (Um=36kV) up to 150kV (Um=170kV);
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), DL/T 1476 Preventive Test Regulations for Electrical Safety Tools and Instruments, DL/T 814 Distribution Automation Terminal;
The product has passed type testing by the National Power Safety Tools and Instruments Quality Supervision and Inspection Center and complies with national electric 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 occurs first;
Free repair or replacement for product quality issues within the warranty period;
Technical support, installation guidance, and customization services (special specifications and special operating condition adaptations) are provided.
Documentation Note
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 be the final authority.
Appendix: Product Outline Drawing
