The 35kV cable branch box is one of the important auxiliary equipment within a 35kV substation. Below is a detailed introduction to the 35kV cable branch box:

I. Main Functions

The 35kV cable branch box can distribute high-voltage incoming cables or low-voltage outgoing power cables, facilitating operation, maintenance, and management of the lines. Additionally, it can connect power cables to transformer substations, load disconnect switches, negative fuse combination switchgear, ring main supply units, etc., serving as splicing, branching, relay, or conversion functions, greatly enhancing the convenience of cable networking.

II. Key Features

1. ‌Outdoor type (also available in indoor type), fully enclosed structure: "Five Prevention" safety, maintenance-free, providing reliable personal safety assurance.

2. Simplified System: Environmentally friendly outdoor cable branch box with high-voltage live display can simplify the urban cable network system, saving investment.

3. Highly adaptable to environments: Outdoor type, dustproof, moisture-proof, flood-resistant, and corrosion-resistant. Flexible in combination, ranging from single-line input/output to multi-line, catering to various wiring requirements.

4. ‌Compact Structure: Small in size, compact in design, and aesthetically pleasing, with easy installation, convenient mode switching, and flexible protection settings. Equipped with an electric display, it can include a short-circuit indicator and a lightning arrester.

5. ‌Low footprint: Compact, low-rise design with aesthetic appearance, blends harmoniously with the surrounding environment. Flexible and diverse wiring options, with extremely convenient installation and operation.

Section 3: Technical Specifications

Generally, the technical specifications of a 35kV cable branch box include but are not limited to:

• Rated Voltage: 35kV (40.5kV models available as well)

• Rated Current: Common specifications include 200A, 400A, 630A, 1000A, 1250A

• Rated Frequency: 50Hz

• Number of cable branch loops: 2~6

• Cable Connector Type: Live-Touchable, Fully Sealed Step-Tightening Silicone Rubber Plug

• Rated Dynamic Stability Current (Peak): 50kA

• Rated lightning impulse withstand voltage: 185kV

• Power Frequency Withstand Voltage (1min): 95kV

IV. Terms of Use

To ensure the normal operation of the 35kV cable branch box, the following usage conditions are typically specified:

• Altitude not exceeding 2,000m

• Operating temperature range: -30℃ to +40℃; daily average relative humidity not exceeding 95%, monthly average not exceeding 90%.

• No frequent violent vibrations, wind speed not exceeding certain limits (e.g., 34m/s)

• Surroundings free of corrosive or flammable gases, steam, and other obvious contaminants

V. Buying Suggestions

When selecting a 35kV cable branch box, it is recommended that users consider the following factors:

1. Define Requirements: Determine the required technical parameters such as rated voltage, rated current, and the number of cable branching circuits based on the actual application scenario and needs.

2. ‌Choose Brands: Prioritize well-known brands and manufacturers with good reputations to ensure product quality and after-sales service.

3. Inspect Craftsmanship: Examine the manufacturing process and details of the product, such as the sealability of the plug and the protection grade of the housing.

4. Compare Prices: Under the premise of meeting quality and requirements, reasonably compare the prices of different brands and models to select products with high cost-performance.

In summary, the 35kV cable branch box plays a crucial role in the power system. For more information or professional advice, please consult a power engineer or relevant technical personnel.