The XL-21 series power distribution box is suitable for power distribution and lighting distribution in industrial and civil buildings with an AC frequency of 50Hz, voltage of 500V and below, and three-phase four-wire power systems. It is also suitable for manufacturing various motor starter cabinets, including full-voltage direct start cabinets, fully digital control soft start cabinets, autotransformer step-down start cabinets, star-delta start cabinets, multi-speed motor start cabinets, etc. It offers dozens of primary circuit scheme numbers or derivative scheme numbers for selection, with a wide range of applications.

This product is an indoor enclosed distribution box. The box is made of thin steel plate bent and welded, with a single left-opening door on the front. The door is equipped with measuring instruments such as voltmeters and ammeters, as well as operating and signaling devices. It is a power distribution device with a simple structure, reliable operation, and low cost.

Rated closing current: 63kA, closing times not less than 2.

Manual operation has interlocking. xl-21 power cabinet wholesale uses advanced and reliable gapless zinc oxide arresters. The nominal discharge current of the arrester is 10kA, featuring high energy absorption, low residual voltage protection, and long protection distance. The one-time encapsulation process with silicone rubber ensures excellent characteristics, anti-aging, and maintenance-free performance.

Switchgear main busbar:

1. The main conductor is insulated with thermoplastic material. To enhance the insulation level of the busbar chamber, the shape of the busbar should ensure a relatively uniform electric field. All main and branch busbars should use copper bars and composite insulation measures. xl-21 power cabinet wholesale also adopts necessary insulation measures to avoid short circuits between busbars caused by various reasons. The busbar chambers between switchgear cabinets should be isolated with insulating barriers and insulating sleeves.

2. Each section of the busbar is selected based on long-term allowable current-carrying capacity and can withstand the electromagnetic force generated by the closing current of the circuit breaker connected to the busbar. The busbars in the busbar chamber are insulated, and the busbar joints should be silver-plated.

3. The main busbar and branch busbar have identifiable markings.

4. The minimum cross-section of the grounding main busbar complies with specifications and power supply bureau requirements.

Secondary part technical requirements, general requirements:

1. The low-voltage chamber should include: lighting lamps, miniature circuit breakers, terminals, secondary wiring, and small busbars for interconnection between cabinets.

2. Protection for control and closing DC secondary circuits uses imported or joint-venture brand DC miniature circuit breakers, with communication interfaces connected to the computer monitoring system.

3. Each cabinet must reserve no less than 15% spare wiring terminals.

4. xl-21 power cabinet wholesale switchgear panels should have schematic wiring diagrams.

5. Programming tools and software should be provided to users, enabling convenient modification of setting parameters and control logic.

Shaanxi Kunwei Electric Co., Ltd. is a comprehensive enterprise engaged in the development, production, sales, and installation services of high and low-voltage power distribution equipment. According to user needs, we develop and customize various non-standard high and low-voltage complete distribution equipment, lighting fixtures, high and low-voltage power components, power cables, power testing instruments, automation control products(intelligent security weak current systems, landscape building lighting planning and design, etc.), engineering solutions, third-party maintenance services, undertaking high and low-voltage testing business, and comprehensive sales. We welcome users from all walks of life and look forward to becoming long-term partners with you.