Product Overview
The Adapter Cable (Quick Plug + Drainage Clamp) is a dedicated connecting cable designed specifically for live-line bypass operations in 10kV/15kV medium-voltage distribution systems. One end features a quick-connect/disconnect interface for direct mating with bypass quick-plug equipment; the other end is equipped with a high-voltage drainage clamp that can be directly applied to bare high-voltage conductors or cables. This design enables rapid connection between high-voltage lines and bypass equipment, establishing a temporary bypass power supply circuit, making it a critical piece of equipment for live-line operations in medium-voltage distribution systems.
Product Features
Electrical and Insulation Performance
Constructed with 15kV-rated high-strength insulated cable. The conductor is high-purity stranded copper wire with excellent electrical conductivity, low contact resistance, and a rated current capacity of 200A/630A. Long-term operation generates minimal heat, with strong corrosion and oxidation resistance.
The insulation layer uses high-performance EPDM (Ethylene Propylene Diene Monomer) rubber with superior insulation properties. It withstands the rated voltage of a 15kV system as well as short-duration overvoltages, meeting the operational requirements of a maximum working voltage of 17.5kV, with a partial discharge level of ≤10pC (at 1.5U₀).
A built-in semi-conductive shielding layer uniformly distributes the electric field, effectively suppressing partial discharge. The cable presents no risk of electrical erosion or dielectric breakdown during long-term operation, ensuring stable and reliable insulation performance.
The drainage clamp is made from high-strength conductive material with a large contact surface area, low contact resistance, and the ability to carry high-current loads. The clamping is firm and resistant to loosening and overheating.
Structural and Safety Features
The two ends adopt different interface designs. One end features a quick-connect/disconnect interface that is universally compatible with mainstream bypass quick-plug equipment, enabling rapid mating without additional tools. The other end is a high-voltage drainage clamp that can be directly applied to bare high-voltage conductors or cables, allowing easy installation and significantly reducing construction time.
An integrated sealed structure design uses dedicated sealing components at the interfaces to provide moisture-proof, waterproof, and contamination-proof protection at IP67 ingress protection rating, enabling long-term stable operation in humid, dusty, outdoor, and other harsh environments.
An integrated grounding/equipotential bonding structure enables reliable grounding, effectively dissipating induced voltages and fault currents to enhance system safety.
The fully insulated structure provides high outer insulation strength, allowing the housing to be touched directly during operation without risk of electric shock, ensuring the safety of operations and maintenance personnel.
Environmental and Weather Resistance
Excellent weather resistance adaptable to a wide temperature range of -40°C to +90°C. Cable insulation and conductor performance do not degrade at high or low temperatures, with no risk of cracking or embrittlement, suitable for both outdoor and indoor applications.
Moisture-proof, waterproof, contamination-proof, and salt-spray resistant, capable of long-term stable operation in humid, dusty, salt-spray, and other harsh environments, unaffected by rainwater or condensation.
Anti-aging, UV-resistant, and ozone-corrosion resistant, with a service life exceeding 10 years, maintenance-free operation, and reduced long-term operational and maintenance costs.
Mechanical and Compatibility Features
High mechanical strength with resistance to tension, bending, and impact. The cable withstands pulling and bending stresses encountered during operations without risk of deformation or damage, suitable for complex field operating environments.
The drainage clamp uses an elastic clamping design, compatible with bare high-voltage conductors or cables of various specifications. Clamping is firm with reliable contact, resistant to slipping and loosening.
The quick-connect/disconnect interface design is universally compatible with mainstream bypass quick-plug equipment, offering strong compatibility with bypass cables, bypass switches, and other devices of various specifications.
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 Level | 200A/630A (selectable) | |
| | Rated Short-Circuit Withstand Current | 20kA/2s, 25kA/2s (selectable) | |
| | Contact Resistance | ≤50μΩ | |
| Structural and Material Parameters | Primary Material | Stranded copper wire (conductor), EPDM rubber (insulation layer), tin-plated copper (quick-plug interface/drainage clamp) |
| | Ingress Protection Rating | IP67 | |
| | Interface Standard | One end quick-connect/disconnect interface, one end high-voltage drainage clamp, compliant with industry standards for bypass operation equipment | |
| | Compatible Equipment | 10kV/15kV bypass operation quick-plug equipment, bare high-voltage conductors/cables | |
| Environmental Parameters | Applicable Altitude | ≤2000m (high-altitude customization available) |
| | Ambient Temperature | -40°C to +90°C (operating temperature), -40°C to +70°C (storage temperature) | |
| | Relative Humidity | ≤100% (non-condensing) | |
| | Seismic Rating | Grade 8 | |
| Applicable Standards | GB/T 12706, DL/T 1476 Preventive Test Regulations for Electric Power Safety Tools and Instruments, DL/T 814 Distribution Automation Terminal |
Application Scope
Applicable Voltage Levels: 10kV/15kV AC medium-voltage distribution systems, compatible with distribution equipment with a maximum working voltage of 17.5kV.
Applicable Operating Scenarios:
Live-line maintenance and retrofit operations on 10kV/15kV bare high-voltage conductors and cables, serving as the transition connection between high-voltage lines and bypass cables;
Live-line bypass operations on urban distribution overhead lines, cable lines, industrial and mining enterprise distribution systems, and distribution equipment at renewable energy (photovoltaic/wind power) step-up substation switchgear;
Temporary bypass power supply for distribution equipment in multiple scenarios including indoor/outdoor distribution rooms, underground utility tunnels, and cable tunnels.
Functional Purpose: To achieve insulation isolation and conductive connection between high-voltage lines and bypass equipment, rapidly establishing a temporary bypass power supply circuit. This ensures continuous power supply to customers during distribution line and equipment maintenance and retrofit operations, providing a safe and reliable connection solution for live-line 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 relevant standards
Relative Humidity: ≤100% (non-condensing)
Environmental Conditions: No corrosive gases, no flammable or explosive media, no severe vibration or shock
Installation Method: Drainage clamp applied to bare high-voltage conductors/cables; quick-plug interface connected directly to bypass equipment interface by insertion/extraction; horizontal or vertical installation permitted; installation space must meet operational requirements
Special Operating Conditions (Customization Required)
Altitude exceeding 2000m
Ambient temperature outside the -40°C to +90°C range
Severely polluted, salt-spray, or chemically corrosive environments
High vibration or high-impact operating conditions
Non-standard interface specifications or special cable length requirements
Special current ratings or current-carrying capacity requirements
Installation and Maintenance
Installation Requirements
Before installation, inspect the product appearance for cracks, damage, and voids; verify the insulation surface is undamaged. Inspect the drainage clamp and quick-plug interface for freedom from corrosion and deformation; confirm elastic clamping of the drainage clamp is reliable.
Clean the surface of bare high-voltage conductors/cables, removing grease, dust, and foreign matter to ensure the clamping surface is dry and clean. Clean the quick-plug interface and the corresponding bypass equipment interface surface, removing grease, dust, and foreign matter to ensure the interfaces are dry and clean.
Apply a uniform coat of dedicated silicone grease lubricant to the outer wall of the quick-plug interface to prevent damage to the insulation layer during installation.
Firmly clamp the drainage clamp onto the bare high-voltage conductor/cable, ensuring sufficient contact area and reliable contact. Securely connect the quick-plug interface to the bypass equipment interface, ensuring full engagement. Lock the anti-withdrawal positioning mechanism. After installation, verify there is no looseness or misalignment.
After installation, conduct insulation resistance testing and power-frequency withstand voltage testing before commissioning.
Maintenance Requirements
Periodically inspect the cable exterior for cracks, damage, discharge marks, and contamination buildup; verify the drainage clamp is firmly clamped without loosening and the quick-plug interface connection is reliable and free from corrosion.
Periodically test insulation resistance to confirm performance meets requirements and to detect potential faults in a timely manner.
Clean the cable surface and interfaces, removing accumulated dust and contamination. Keep the insulation surface dry and clean, preventing degradation from grease and chemical substances.
If cracks, damage, discharge, overheating, or other abnormalities appear on the cable or interfaces, immediately take the unit out of service and replace it. Operation with known defects is strictly prohibited.
Insertion/extraction of the quick-plug interface and clamping/unclamping of the drainage clamp must be performed using dedicated insulated operating tools. Bare-hand operation of live equipment is strictly prohibited. All operations must strictly comply with distribution safety regulations.
Safety Precautions
The product must be installed, commissioned, and maintained by qualified electrical personnel with certification for medium-voltage distribution live-line operations. Operation by non-qualified personnel is strictly prohibited.
The product must be used in conjunction with bypass operation equipment and high-voltage lines of the corresponding specifications. Mismatching equipment of different voltage or current ratings is strictly prohibited, as this will result in insulation failure and safety incidents.
The cable must not be disassembled or modified without authorization, as this will void the warranty and safety guarantees. The use of non-dedicated tools to forcibly install or remove interfaces or drainage clamps is strictly prohibited.
During installation, damage to the insulation surface is strictly prohibited. Silicone grease lubricant must be applied uniformly to avoid compromising insulation performance and sealing effectiveness. The drainage clamp must be firmly clamped with reliable contact to prevent overheating and discharge due to poor contact.
During storage, the product must be kept in a dry, well-ventilated, and cool environment, away from direct sunlight, high temperatures, moisture, and compression. Contact with sharp objects that could damage the insulation layer is strictly prohibited.
When performing live-line operations involving the drainage clamp and quick-plug interface, distribution safety regulations must be strictly observed, appropriate safety protective measures must be in place, and unauthorized operations are strictly prohibited.
Model Designation
| Model Identifier | Meaning |
|---|---|
| 15kV | Applicable system voltage level; rated voltage 15kV, maximum working voltage 17.5kV |
| Quick Plug + Drainage Clamp | Interface type; one end quick-connect/disconnect interface, one end high-voltage drainage clamp |
| Adapter Cable | Transition cable for connection between high-voltage lines and bypass operation equipment |
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) up to 35kV (Um=40.5kV); DL/T 1476 Preventive Test Regulations for Electric Power Safety Tools and Instruments; DL/T 814 Distribution Automation Terminal
The product has passed type testing by the National Electric Power Safety Tool 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 comes first
Within the warranty period, products with quality defects will be repaired or replaced free of charge
Technical support, installation guidance, and customization services are available (special specifications and special operating condition adaptations)
Documentation Notes
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
