Low Voltage Switchgear & Distribution Panels
The XL-21 Power Distribution Board is an indoor enclosed low-voltage distribution equipment specifically designed for power distribution, lighting distribution, and motor control in industrial and civil buildings. Constructed with high-quality steel plate, it features a compact structure, reliable operation, and easy installation and maintenance. It is suitable for three-phase power systems with AC 50Hz/60Hz and rated voltage up to 380V/660V, widely used in power plants, industrial and mining enterprises, and various building facilities.
Detailed Technical Specifications
Parameter Category | Technical Specifications |
Rated Characteristics | Rated Operational Voltage: 380V/660V AC |
Short-circuit Performance | Rated Short-time Withstand Current: 30kA/1s (RMS), some models up to 50kA/1s |
Protection Degree | IP30 (Standard), IP40 option available |
Enclosure Structure | Height: 1700mm, 1800mm, 1900mm |
Installation Methods | Wall-mounted floor installation, can also be installed away from the wall or wall-mounted (special request) |
Cable Entry/Exit | Bottom entry/bottom exit (Standard), Top entry/top exit, Top cover can be opened for cables or with busbar compartment added |
Compliance Standards | IEC 61439-1, GB 7251.1, CCC Certified |
Key Product Features
1.Robust and Reliable Construction
Enclosure made of high-quality cold-rolled steel plates bent and welded, offering high mechanical strength and durability.
Enclosed dust-proof design with a protection degree of IP30 or higher, effectively preventing foreign object entry and electric shock.
Surface treatment: Typically finished with powder coating, corrosion-resistant and aesthetically pleasing (standard color is usually RAL7035 light grey, subject to confirmation).
2.Flexible Electrical Configuration
Main busbar horizontally arranged at the top of the cabinet, using TMY hard copper bars.
Supports various electrical components: Can be equipped with isolation switches, circuit breakers (air circuit breakers), contactors, thermal relays, fuses, etc., to meet power distribution and motor control needs.
Rich single-line diagram schemes: Offers multiple standard scheme options or customizations, can be configured as feeder cabinets, motor control cabinets (e.g., direct-on-line, star-delta, soft-start), or dual power supply transfer cabinets.
Modular design: Internal mounting beams are adjustable, facilitating easy installation and maintenance of electrical components.
3.Safety and Convenience Design
Operating handle and display: Equipped with a knife switch operating handle (upper right side) or circuit breaker operating mechanism on the front; door can be fitted with voltmeters, ammeters, indicator lights, operation buttons, etc. for monitoring and control.
Door design: Single front door (left or right opening), wide opening angle (e.g., >135°). The interior becomes fully accessible when the door is opened, facilitating inspection and maintenance.
Comprehensive protection: Provides short-circuit, overload, overvoltage, undervoltage, and phase failure alarm protection functions.
Lifting and wiring: Lifting rings on the top for easy transportation and installation; bottom cable entry/exit with cable clamps for secure fixing.
4.Strong Adaptability
Environmental adaptability: Suitable for indoor environments with an ambient air temperature ranging from -5°C to +40°C, average temperature not exceeding +35°C within 24 hours, and altitude not exceeding 2000m.
Various installation and wiring methods: Meets different site layout requirements.
Multiple units can be combined: Facilitates easy expansion of distribution capacity.
Typical Applications
Industrial sector: Low-voltage distribution systems in power plants, substations, petroleum, chemical, metallurgical, machinery, mining industries and plants, serving as power distribution and motor control centers (MCC).
Civil and commercial buildings: Power and lighting distribution in high-rise buildings, real estate projects, hotels, and restaurants.
Infrastructure: Power distribution and control for public utilities such as water supply and drainage pump stations, water treatment plants.
Optional Configurations
Standard Type (P-Type): Enclosure height 1700mm or 1800mm, independent installation, top can be opened for cable entry/exit.
With Top Busbar Type (M-Type): Enclosure height 1900mm, top cover is removable for easy busbar installation and disassembly.
Special Environment Type: Higher protection degree (e.g., IP41, IP54) or anti-corrosion treatment available upon request.
Customized Solutions: Customization supported based on user's single-line diagrams, schematic diagrams, and specifications of electrical components
Q1. What are the primary applications for the XL-21 Power Distribution Board?
A: The XL-21 is a versatile floor-standing cabinet used in industrial and civil buildings for AC 50Hz/60Hz, rated voltage up to 660V, and rated current up to 630A. it is the ideal choice for power distribution, motor control, and protection against overloads or short circuits in workshops and pump rooms.
Q2. What is the structural design of the XL-21 Board?
A: The XL-21 features a closed-type enclosure made of high-quality cold-rolled steel plates. The frame is welded or bolted for maximum rigidity. The door typically has a large opening angle (up to 135°) for easy component installation and internal wiring access.
Q3. What Ingress Protection (IP) ratings are available for XL-21?
A: Our standard XL-21 boards are rated at IP30. For more demanding environments, we can provide customized versions up to IP43 or IP54 by adding specialized door gaskets and reinforced ventilation structures.
Q4. Can the XL-21 handle both power distribution and motor starting?
A: Yes. The XL-21 is frequently used as a Motor Control Center (MCC) for small to medium-sized motors. We can integrate Direct-On-Line (DOL) starters, Star-Delta starters, or Soft Starters within the cabinet according to your technical drawings.
Q5. What are the standard dimensions for an XL-21 Board?
A: While dimensions are customizable, our standard sizes at the Shanxi factory are typically 1600/1700/1800mm (H) x 600/700/800mm (W) x 300/400/500mm (D). We can adjust the height and depth to fit your specific electrical room constraints.
Q6. What types of circuit breakers can be installed in the XL-21?
A: The internal mounting plate is highly flexible. We can install Molded Case Circuit Breakers (MCCB), Knife Switches (for visible isolation), and Miniature Circuit Breakers (MCB) from global brands like Schneider, ABB, and Siemens, or high-quality local brands.
Q7. How do you ensure the durability of the enclosure against rust?
A: Every XL-21 enclosure undergoes a rigorous surface treatment process: degreasing, pickling, phosphating, and finally an electrostatic epoxy powder coating (usually RAL 7035). This ensures a long-lasting, anti-corrosive finish even in humid industrial environments.
Q8. Is the XL-21 board equipped with measuring instruments?
A: Yes. The front door is typically equipped with analog or digital voltmeters and ammeters, along with signal indicator lights and rotary switches, allowing operators to monitor the power status without opening the cabinet.
Q9. How do you manage safety and earthing in the XL-21?
A: Safety is paramount. Each cabinet includes a dedicated copper grounding busbar. The door is connected to the main frame via a flexible braided copper wire to ensure continuous earthing and protect personnel from leakage currents.
Q10. What documentation is provided for international shipping from your factory?
A: For every export order, we provide a complete English technical file, including Single-Line Diagrams (SLD), internal wiring schematics, a Factory Acceptance Test (FAT) report, and an installation manual to ensure smooth setup at your project site.
