Product Overview
The XL-21 Series Distribution Cabinet is a classic, high-performance solution for power distribution and motor control in industrial and commercial environments. Designed as a floor-standing unit, the XL-21 is engineered to handle AC 50Hz/60Hz systems with rated voltages up to 660V.
This cabinet is the primary choice for factories, power plants, and high-rise buildings where a centralized "Main Switch" is required to manage light and power distribution. Its rugged construction and spacious interior make it ideal for housing a combination of Moulded Case Circuit Breakers (MCCB), AC contactors, and thermal relays for motor starting applications.
Key Technical Advantages
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Heavy-Duty Floor-Standing Design: Built from 1.5mm to 2.5mm cold-rolled steel, providing a stable and rigid chassis that can withstand the mechanical stress of industrial operation and heavy cabling.
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Standard XL-21 Configuration: Adheres to the classic industrial footprint, ensuring compatibility with standard replacement parts and making it easy for engineers to integrate into existing power rooms.
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Superior Circuit Protection: Optimized for high-amperage protection (up to 630A), offering a reliable firewall against overloads, short circuits, and under-voltage events.
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Advanced Thermal Management: Features a generous internal volume and strategic ventilation louvers to ensure that even high-load components remain within safe operating temperatures.
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Customizable Internal Layout: The modular mounting plate allows for a flexible mix of MCBs, MCCBs, and digital power meters, tailored to your specific single-line diagram (SLD).
Technical Specifications
| Feature |
Detailed Specifications |
| Model Series |
XL-21 (Industrial Power Hub) |
| Rated Operating Voltage |
AC 380V / 400V / 660V |
| Rated Current (In) |
63A, 100A, 250A, 400A, 630A |
| Rated Frequency |
50Hz / 60Hz |
| Enclosure Material |
High-Strength Cold-Rolled Steel / Galvanized |
| Ingress Protection |
IP30 / IP40 / IP54 (Customizable) |
| Surface Finish |
Epoxy Powder Coating (RAL 7032 / 7035) |
| Standard Compliance |
IEC 61439, CE, GB 7251.1 |
Primary Application Scenarios
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Manufacturing Plants: Centralized power distribution for assembly lines and localized motor control centers (MCC).
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Infrastructure & Utilities: Main switchgear for pumping stations, water treatment facilities, and ventilation systems.
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Commercial Real Estate: Floor-level power management for shopping malls, hospitals, and office complexes.
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Mining & Extraction: Rugged power cabinets for remote equipment control where durability and dust protection are critical.
Why Specify the XL-21 Series?
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Proven Reliability: The XL-21 design has been the global industrial standard for decades, known for its long service life and ease of maintenance.
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Installer-Friendly Accessibility: The wide-opening front door and removable top/bottom gland plates allow for fast cable termination and clean wire management.
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Safety First Construction: Every unit includes pre-welded copper-plated grounding studs and internal protective shields (dead-fronts) to ensure total operator safety during inspection.
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Flexible Component Sourcing: We can supply the cabinet "Empty" for local assembly or fully populated with world-class breakers from ABB, Schneider, Siemens, or CHINT.
FAQ
Q: Can the XL-21 be used for outdoor applications?
A: The standard XL-21 is designed for indoor use (IP30/IP40). However, we offer a specialized Outdoor XL-21 version featuring an IP54/IP55 rating, a rain hood, and a dual-layer door for weather protection.
Q: What is the maximum breaking capacity for this cabinet?
A: The breaking capacity depends on the MCCBs installed. The cabinet structure and busbar system are designed to withstand high short-circuit currents up to 15kA - 30kA (Icw).
Q: Is it suitable for Direct-on-Line (DOL) motor starting?
A: Absolutely. The XL-21 is frequently used as a motor control box, with enough internal space to comfortably house contactors and thermal overloads for multiple motors.
