XL‑21 Low‑Voltage Power Distribution Cabinet

Product Positioning & Core Value

• Targeting the field of terminal low‑voltage power distribution, XL‑21 low‑voltage power distribution cabinet is designed for power supply of power‑driven equipment, motor start‑stop control and circuit fault protection. It effectively addresses typical drawbacks of conventional distribution boxes, including insufficient protection degree, disordered internal wiring and difficult inspection and maintenance.
• Adopting modular construction, the cabinet features clearly‑partitioned internal space and neatly‑arranged main busbars. It allows convenient cable access in top‑in top‑out or bottom‑in bottom‑out modes, with sufficient space reserved for inspection and operation. It supports optional component brands, adjustable circuit quantity and customized electrical schemes. Flexible adaptation to on‑site distribution requirements ensures long‑term stable performance with minimal downtime under both conventional and complex working conditions.

Product Functions

• Power Distribution: Realize on‑demand shunting of main‑line power to supply stable multi‑circuit power for power‑driven equipment, lighting systems, electromechanical devices and various electrical loads.
• Equipment Control: Built‑in control electrical components support manual or automatic start‑stop control and operation status management for motors, water pumps, air compressors and production‑line equipment.
• Safety Protection: Provide protection against overload, short‑circuit and earth‑leakage. It rapidly trips the faulty circuit upon fault occurrence to protect equipment and prevent escalation of electrical accidents.
• Operation Monitoring: Equipped with analog or digital‑display meters and status indicator lamps to display real‑time voltage, current and circuit on‑off status, enabling operators to track system conditions and timely detect anomalies.
• Flexible Expansion: ATS (Automatic Transfer Switch) can be fitted for standby power switching. Circuits can be added or removed according to load variation to meet customized distribution requirements for different power levels and application scenarios.

Technical Parameters

• Rated Frequency: 50 Hz
• Rated Insulation Voltage (Ui): 690 V
• Main‑circuit Rated Operational Voltage (Ue): AC 380 V / 660 V
• Control‑circuit Rated Operational Voltage: AC 220 V / 380 V
• Optional Rated Current: 100 A, 160 A, 200 A, 250 A, 400 A, 630 A
• Rated Short‑time Withstand Current (Icw): 15 kA (30 kA customizable, subject to busbar configuration)
• Cabinet Material: 2.0 mm cold‑rolled steel sheet with electrostatic powder‑coated anti‑corrosion finish
• Degree of Protection: IP30 (Standard, IP40 optional)
• Installation Method: Indoor floor‑mounted against wall
• Ambient Operating Temperature: -5 ℃ ~ +40 ℃ (heat dissipation / dehumidification modules optional for high‑temperature and high‑humidity environments)
• Relative Humidity: ≤95 % (no condensation)
• Applicable Power System: 3P3W / 3P4W / 3P5W (three‑phase three‑wire / four‑wire / five‑wire configurations)
• Operating Environment: Indoor; no corrosive gas, no explosive‑combustible medium, no severe vibration
• Applicable Standards: GB/T 7251.12‑2013, IEC 61439‑2

Application Scenarios

• Industrial & Mining: Deployed in chemical, mining, machinery manufacturing, textile‑printing‑dyeing, metallurgical and other factories to provide power distribution, control and protection for production lines, water pumps, air compressors, fans and other power‑driven equipment. For heavily dusty environments, IP54 or higher protection grade is recommended, or installation inside a dedicated electrical room.
• Commercial & Building: Used in office buildings, residential compounds, star‑rated hotels and commercial complexes for building power supply, public lighting, central air‑conditioning and electromechanical equipment power distribution.
• Public Facilities: Applied in schools, hospitals, railway stations and industrial parks for daily power distribution and power supply to various facilities.
• Infrastructure Projects: Serves as standardized auxiliary distribution equipment for distribution rooms, municipal projects and terminal power distribution of small‑scale power stations.
• Medium‑and‑Small‑Sized Projects: Suitable for plant reconstruction and expansion, temporary power supply at construction sites and complete low‑voltage power‑distribution systems for small workshops, featuring flexible adaptation and rapid deployment.

Product Advantages

• Robust Structure: Rigid cabinet with integral welding of 2.0 mm steel sheet, impact‑resistant, non‑deformable and long service life.
• Safe & Reliable: TTA (Type‑Tested Assembly) type‑test verified; equipped with overload / short‑circuit / earth‑leakage protection for fast faulty‑circuit isolation.
• High Customizability: Modular frame structure; circuit quantity, component brands and electrical schemes configurable on request.
• Easy Maintenance: Clear internal zoning and sufficient wiring space for simple and efficient inspection and operation.
• Wide Compatibility: Covers industrial‑mining, commercial, public‑building and infrastructure sectors; multiple current ratings from 100 A to 630 A available.
• Standard‑Compliant: Fully compliant with GB/T 7251.12‑2013 and IEC 61439‑2.