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Help CenterT-type Plug and Drop 35KV Branch Box, Fully Insulated and Shielded Design
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As a specialized manufacturer with over a decade of experience in high-voltage electrical equipment, Jinhua Dika Electrical Equipment Co., Ltd. proudly presents our T-type Plug and Drop 35KV Branch Box. Engineered for reliability in demanding grid applications, this product embodies our commitment to innovation and quality, backed by a robust ISO9001 quality management system. Designed for utilities, industrial complexes, and renewable energy projects, this branch box offers a superior, maintenance-friendly solution for creating secure and efficient tap connections in 35KV underground distribution networks.
Our T-type Branch Box features a fully insulated and shielded design, a critical advancement that enhances safety and system integrity. The core construction utilizes high-performance, track-resistant elastomeric insulation such as silicone rubber or EPDM, which is molded directly onto the conductive components. This creates a seamless, void-free insulation barrier that withstands electrical stresses, environmental aging, and thermal cycling. Over this insulation, an integrated semi-conductive layer and a metallic screen are applied, forming a complete shield that:
• Equalizes the electric field distribution, preventing partial discharges.
• Provides effective grounding for safety and fault current management.
• Shields the connection from external electromagnetic interference.
The "plug and drop" functionality is a cornerstone of its design. The main line connection is typically a bolted or clamp-on plug-in interface that allows for quick and secure connection to the 35KV cable without requiring specialized tools under live working conditions (using hot-sticks). The drop cable interface is similarly designed, enabling a fast, reliable tap connection. This design drastically reduces installation time, minimizes human error, and enhances worker safety by limiting exposure time in the trench or vault.
Key Technical Specifications & Advantages:
| Parameter | Specification / Advantage |
| Rated Voltage | 35KV (System Voltage) |
| Rated Current | Typically 600A (customizable upon request) |
| Impulse Withstand Voltage | 250KV (minimum) |
| Power Frequency Withstand Voltage | 95KV for 1 minute |
| Partial Discharge Level | < 5 pC at 1.5U0 |
| IP Rating | IP68 (Submersible and dust-tight) |
| Shielding System | Full-length, factory-applied conductive layer and copper mesh screen |
| Operating Temperature | -40°C to +90°C (continuous) |
| Short-Circuit Withstand | 40kA for 3 seconds |
Benefits for Your Project:
• Enhanced Safety: The fully insulated design eliminates exposed live parts, protecting personnel and the public. The shielding ensures safe touch voltage levels.
• Superior Reliability: Excellent resistance to moisture, chemicals, and UV radiation ensures long-term performance in harsh environments, reducing failure rates and maintenance costs.
• Reduced Installation Cost & Time: The pre-molded, plug-in design requires no on-site pouring of compounds or complex terminations. Installation can be completed in a fraction of the time compared to conventional methods.
• Space Efficiency: Its compact design is ideal for congested urban vaults or wind/solar farm switchgear where space is at a premium.
• Flexibility: Suitable for transitioning between different cable types (e.g., PILC to XLPE) and is compatible with various cable diameters through adaptable connectors.
Jinhua Dika's manufacturing prowess is demonstrated by our annual export value of US$1-1.5 million and our products' acceptance in diverse markets across North America, Europe, Southeast Asia, and Oceania. Our multi-port shipment capability (Shanghai, Tianjin, Guangzhou, Ningbo) ensures flexible and efficient logistics. Supported by a dedicated team of 11-50 skilled professionals and a comprehensive quality framework including ISO 9001, ISO 14000, and OHSAS 18001, every T-type Branch Box undergoes rigorous testing. This commitment to quality translates into a product you can trust for critical infrastructure, offering not just a component, but a long-term partnership focused on grid resilience and operational efficiency. Contact us today for detailed technical data sheets and customized solutions to meet your specific 35KV network requirements.
Frequently Asked Questions (FAQ)
Q1: What exactly does "fully insulated and shielded" mean for this branch box?
A: It means the entire conductive assembly is encased in a layer of high-grade rubber insulation (like EPDM), with no metallic parts exposed. Over this insulation, a semi-conductive layer and a metallic screen (braid or tape) are applied. This design provides primary insulation, controls electrical stress, and offers personnel protection and EMI shielding.
Q2: Is this branch box suitable for direct burial, or only for vault installation?
A: With its IP68 rating and robust, sealed construction, it is inherently designed for submersion and is perfectly suitable for direct burial applications. It is also widely used in manholes, vaults, and above-ground pedestals.
Q3: Can I use it for both aluminum and copper conductor cables?
A: Yes. The connector interfaces within the branch box are typically designed to be compatible with both aluminum and copper conductors of specified size ranges. Please provide your cable specifications for confirmation.
Q4: Does the "plug and drop" feature allow for live-line (hot) installation?
A: The design facilitates live working. The plug-in connectors can be operated using insulated hot-sticks by trained personnel following proper safety protocols. This feature is a major advantage for maintenance and expansion without power outages.
Q5: What is the expected service life of this product?
A: When installed correctly and operated within specifications, the expected service life exceeds 30 years. The high-quality, weather-stable elastomeric materials are resistant to thermal cycling, ozone, and tracking.
Q6: Are fault indicators or test points available?
A: Yes, these are popular optional features. We can integrate visible or remote fault indicators and insulated test points for easier fault location and system testing without dismantling the box.
Q7: What standards does this product comply with?
A: The product is designed and tested in accordance with international standards such as IEC 60502-4 and IEEE 404. We can provide test reports upon request. Our manufacturing processes are certified to ISO 9001.
Q8: What is the lead time for an order, and what packaging is used?
A: Standard lead time is 4-6 weeks after order confirmation. Each unit is individually packed in a sturdy cardboard box with foam or molded support to prevent transit damage, and shipped via sea or air from our main ports.
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