1. Refer to technical standards
GB4208-2008 Enclosure protection class (IP code)
GB7251.5-2008 Low-voltage switchgear and controlgear - Part 5: Special requirements for power distribution equipment for public power grids
2. Operating environmental conditions
Altitude: ≤ 1000m.
Annual maximum temperature: +45℃ (average 24-hour value does not exceed 35℃).
Annual minimum temperature: -25℃.
Environmental humidity: Monthly average relative humidity does not exceed 90%, daily average relative humidity does not exceed 95%.
Pollution zone: Grade 3 pollution zone
Earthquake intensity: 7.5 degrees, horizontal acceleration 0.15g.
Wind speed: Not exceeding 34m/S.
Installation location/tilt angle: Outdoor or indoor / Tilt angle does not exceed 3℃.
Solar radiation intensity: 0.1W/cm2.
Special circumstances to be negotiated separately.
3. Technical Requirements
3.1 Equipment Name: DFW Type Cable Distribution Box.
3.2 Equipment Shell
The shell is made of stainless steel or SMC material.
3.3 Technical Parameters
3.3.1 Rated Voltage: 380V.
3.3.2 Rated Current: 100A - 630A.
3.3.3 Rated Frequency: 50Hz.
3.3.4 Shell Parameters
Shell Protection Grade: ≥ IP34D.
The shell is made by welding and assembling of stainless steel material or assembly of SMC material.
3.4 Low-Voltage Main Component Parameters
3.4.1 Air Circuit Breaker Parameters and Requirements:
Rated Voltage 380V.
Main Busbar Rated Current In = 100 - 600A.
Main Busbar Rated Short-Circuit Withstand Current Icw: 15 kA.
4. Busbar Structure
4.1 Circuit Breaker Type Busbar Structure:
4.1.1 The main busbar must meet the requirement that the current carrying capacity is not less than 630A under the average temperature of the hottest month. The purity of the copper busbar is 99.90%; the rated short-time withstand current of the busbar is 15kA.
4.1.2 Busbar Current Carrying Capacity:
Horizontal busbar: Rated current 630A
Feed circuit: As per customer requirements
4.1.3 Special Requirements:
Use cable entry and exit from below. The entry and exit holes should be equipped with cable protection cones, and cable fixing brackets should be provided to facilitate the installation and sealing of the cables;
The number of knock-down holes is greater than the total number of entry and exit lines and grounding;
The box should have a good ventilation and heat dissipation structure design (such as ventilation louvers, ventilation slots, etc.);
The top cover and bottom plate of the box can be adjusted as needed to facilitate the entry and exit of cables;
The product is designed for maintenance-free.
When the material is selected as SMC, the product model is DFW-SMC
