Scope of Delivery T Cable Connector Insulation Conductor cable lug Adaptor Two head screw Clearing Paper Silicone Lubricant Installation Instruction Sheet Quality Certificate
The JY TT-35kV 630A T cable connector is a fully insulated, fully shielded, and separable cable tapping component designed specifically for 35kV (Um=40.5kV) AC power systems. Manufactured using EPDM rubber through integral injection molding, it features a built-in conductive connection structure and a semi-conductive shielding layer, providing IP67 protection. It enables T-type tapping and ring network connections of cables and is widely used in European-style ring main units, cable branch boxes, prefabricated substations, and other power distribution equipment, providing a safe and reliable tapping and interconnection solution for 35kV power cables.
II. Product Characteristics
1. Excellent electrical performance
High insulation reliability : The high-quality EPDM rubber insulation layer meets the requirements of 35kV system for power frequency withstand voltage and impact withstand voltage, and there is no risk of insulation breakdown during long-term operation.
Uniform electric field control : Built-in semi-conductive shielding layer ensures uniform electric field distribution, eliminates the risk of partial discharge, and ensures long-term stable operation of the equipment.
High current carrying capacity : It can withstand a rated current of 630A, with low contact resistance and strong current carrying capacity, and can withstand normal operating current and short-circuit current impact.
2. Comprehensive security measures
Fully insulated and touchable structure : After installation, the connector shell is reliably grounded through a grounding wire, and the surface is at ground potential, allowing maintenance personnel to directly touch it without the risk of electric shock.
IP67 protection : Fully sealed structure, effectively preventing moisture, dust, and oil intrusion, suitable for harsh environments such as humid and dusty conditions.
Misoperation prevention design : Standardized interfaces and foolproof structure to avoid installation errors and ensure construction and maintenance safety.
3. Easy installation and maintenance
Separable pluggable structure : No on-site casting or welding is required; it can be directly plugged in and installed, resulting in high construction efficiency and convenient subsequent inspection, expansion, and maintenance.
Modular design : The circuit can be flexibly expanded according to the needs of different scenarios to adapt to the cable tapping requirements.
Maintenance-free operation : The rubber material is resistant to aging and corrosion, and has a service life of more than 20 years, reducing the cost of later operation and maintenance.
4. Strong environmental adaptability
Wide temperature range operation : It can adapt to a wide temperature range of -40℃ to +90℃. The elasticity and insulation properties of the rubber do not decrease under high and low temperatures, and there is no risk of cracking or embrittlement.
Weather and corrosion resistant : Resistant to ultraviolet rays, ozone, and salt spray corrosion, suitable for harsh environments such as coastal areas and industrial and mining enterprises.
Compact structure : Small size, small footprint, suitable for installation in confined spaces inside equipment.
III. Technical Parameters
Parameter categories
project
Technical indicators
Electrical parameters
Applicable system voltage
35kV AC (Um=40.5kV)
Rated current
630A
Power frequency withstand voltage (5min)
70kV, no breakdown
Impact resistance (peak)
170kV, non-breakdown
Partial discharge quantity
≤5pC (at 1.5 times rated voltage)
Contact resistance
≤10μΩ
Structural and material parameters
Main material
EPDM rubber + high conductivity copper busbar
Protection level
IP67
Interface
Standard European 35kV 630A interface
grounding device
Includes braided copper grounding wire
Environmental parameters
Applicable altitude
≤2000m (Customization available for high altitudes)
Operating ambient temperature
-40℃~+90℃
Storage ambient temperature
-40℃~+70℃
relative humidity
≤100% (no condensation)
Implementation Standards
National Standards
GB/T 12706, GB/T 11022
International Standards
IEC 60840
IV. Scope of Application
Applicable voltage level : 35kV (Um=40.5kV) AC power system.
Typical application scenarios :
European-style ring main unit internal cable branching constructs a ring power supply structure;
Multiple circuit cables are connected in parallel for power supply and branch output within the cable branch box;
T-type cable connection on the high-voltage side of the prefabricated substation;
35kV cable branching in harsh environments such as industrial and mining enterprises and coastal areas;
Cable interconnection of urban power distribution networks and industrial park power distribution systems.
Function and Purpose : To realize T-type tapping and ring network connection of 35kV cables, and to provide a fully insulated and fully shielded cable tapping solution for power distribution systems, ensuring power supply reliability and operation and maintenance safety.
Environmental conditions: No corrosive gases, no flammable or explosive media, no severe vibration or impact;
Installation method: plug-in installation, compatible with standard European 35kV 630A equipment interface.
2. Special usage conditions (customization required)
The altitude exceeds 2000m;
The ambient temperature exceeds the range of -40℃ to +90℃;
Severely polluted, salt spray, and chemically corrosive environments;
High vibration and high impact conditions;
Non-standard interfaces and special current rating requirements.
VI. Installation and Maintenance
1. Installation process requirements
Construction preparation : The work shall be carried out by qualified professionals with high-voltage electrical installation qualifications. Special tools, silicone grease, cleaning supplies, etc. shall be prepared; the appearance of the joints shall be checked to ensure that there are no cracks, damage, or bubbles, and that all accessories are complete.
Cable processing : Strip the cable according to the process requirements. The stripping length and size must meet the joint specifications to avoid damaging the cable insulation and conductor.
Cleaning and lubrication : Clean the connector interface and cable surface to remove oil and dust, and apply silicone grease evenly to ensure smooth insertion and removal.
Installation and connection : Insert the cable into the connector, ensuring that it is installed in place, tightly connected, and without looseness or misalignment; reliably connect the connector to the equipment interface.
Grounding connection : Reliably ground the connector’s built-in grounding wire to ensure that the casing is at ground potential and achieve the “touchable” characteristic.
Installation inspection : Check that the connector is installed in place, the sealing surface is free of gaps and damage, the connection is reliable, and the grounding is good.
2. Maintenance and Care Points
Regularly inspect the appearance of the connectors, ensuring they are free of cracks, damage, discharge marks, and dirt accumulation, and that they are securely connected to cables and equipment interfaces without any looseness.
Regularly inspect the grounding wire to ensure it is free from breakage, oxidation, or loosening, and that the grounding connection is reliable.
Regularly test the insulation resistance and contact resistance of the joints to ensure that the performance meets the requirements and to promptly identify potential problems.
Clean the surface of the connector to remove dust and dirt, and prevent oil and chemicals from corroding the rubber shell.
If any abnormalities such as cracks, damage, discharge, or excessive insulation resistance are found in the joint, it must be stopped immediately and the joint replaced. Operation with defects is strictly prohibited.
VII. Precautions
The product must be used with the corresponding 35kV/630A European standard cable and equipment interface. It is strictly forbidden to use the wrong cable or equipment, otherwise it will lead to connection failure and cause safety accidents.
Non-professionals are strictly prohibited from disassembling or modifying the connectors, otherwise the warranty and safety guarantee will be lost. It is also strictly prohibited to forcibly stretch or cut the connectors to avoid damaging the rubber materials and conductive components.
During installation, it is essential to ensure that the connectors are properly installed and the grounding wire is reliably grounded; otherwise, the device will lose its “touchable” characteristic and pose a risk of electric shock.
When storing, it should be placed in a dry, ventilated, and cool environment, avoiding direct sunlight, high temperature, humidity, and compression. It is strictly forbidden to contact with sharp objects that may damage the connector.
During construction and operation and maintenance, strictly abide by the high-voltage electrical safety operation procedures and take good safety protection measures.
VIII. Standard Configuration List
Serial Number
name
use
1
JY TT-35kV 630A T-type cable connector body
The core tap changer enables T-connection and insulation protection of the cable.
2
Braided copper grounding wire
Grounding of the connector housing ensures safe handling.
3
Special silicone grease
Apply lubricant to ensure smooth insertion and removal and a tight connection.
4
Installation Instructions
Installation and Construction Guidance Documents
5
Product Certificate
Product quality certification documents
IX. Implementation Standards and Certification
The product has passed the type test of the National Wire and Cable Quality Supervision and Inspection Center and conforms to GB/T 12706 “Extruded Insulated Power Cables and Accessories with Rated Voltage of 1kV (Um=1.2kV) to 35kV (Um=40.5kV)”, GB/T 11022 “Common Technical Requirements for Standards of High Voltage Switchgear and Controlgear”, IEC 60840 “Test Methods and Requirements for Extruded Insulated Power Cables and Accessories with Rated Voltage of 30kV (Um=36kV) and Above to 150kV (Um=170kV)”.
