Distribution Box Mcb Main Switch Electrical Distribution Box Xl21 Power Distribution Cabinet

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.

• 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.

• 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.

• Superior Circuit Protection: Optimized for high-amperage protection (up to 630A), offering a reliable firewall against overloads, short circuits, and under-voltage events.

• Advanced Thermal Management: Features a generous internal volume and strategic ventilation louvers to ensure that even high-load components remain within safe operating temperatures.

• 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).

1. Manufacturing Plants: Centralized power distribution for assembly lines and localized motor control centers (MCC).

2. Infrastructure & Utilities: Main switchgear for pumping stations, water treatment facilities, and ventilation systems.

3. Commercial Real Estate: Floor-level power management for shopping malls, hospitals, and office complexes.

4. Mining & Extraction: Rugged power cabinets for remote equipment control where durability and dust protection are critical.

• Proven Reliability: The XL-21 design has been the global industrial standard for decades, known for its long service life and ease of maintenance.

• Installer-Friendly Accessibility: The wide-opening front door and removable top/bottom gland plates allow for fast cable termination and clean wire management.

• 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.

• 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.

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.