XL-21 Low Voltage Switchgear

Technical Highlights

 Structural Design

• Enclosure: 1.5-2mm cold-rolled steel, phosphating + electrostatic spraying (standard RAL7035, customizable)

• Easy Operation: Knife switch handle on front right column, ≥90° door opening for full access

• Modular Layout: Separate compartments for incoming/outgoing lines & metering

 Electrical Performance

• Protection System: Standard air circuit breaker + fuse protection (contactor + thermal relay optional)

• Monitoring: Front-mounted voltage meter (standard), optional:

• Current meter (0-600A)

• Power factor meter

• Energy metering module

• Insulation: 3000V/1min withstand voltage, >1000MΩ insulation resistance

 Safety Features

• 5-Protection Design: Mechanical interlock (knife switch + door lock)

• Visual Management: Tempered glass window (explosion-proof optional)

• Emergency Stop: Red/green indicator + emergency button (optional)

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Product Series & Configurations

Optional Accessories:

• Various current-rated breakers (DZ47-63H/2P 63A etc.)

• Anti-condensation heater (for humid environments)

• Wireless temperature monitoring system

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Technical Specifications

Mechanical Parameters:

• Enclosure thickness: ≥1.5mm (steel)

• Mounting: Wall-mounted (expansion bolts)

• Lock type: 3-point mechanical lock (electromagnetic optional)

Electrical Parameters:

• Rated insulation voltage: 500V

• Short-time withstand current: 10kA/1s

• Busbar: TMY-30×4 (standard), upgradable to TMY-50×6

Environmental Adaptability:

• Altitude: ≤2000m (derating required above)

• Humidity: ≤90% at +20°C

• Seismic: Level 8 (IEC 60068-3-3)

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Quality Control & Certifications

Standards Compliance:

• IEC 60947-2:2016 (LV circuit breakers)

• GB/T 7251.1-2005 (LV switchgear assemblies)

• DL/T 404-2007 (indoor AC HV switchgear)

Testing:

• Type tests: Temperature rise (≤40K), short-circuit withstand

• Factory tests: 100% mechanical operation (≥50 cycles)

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Installation & Maintenance

Installation Requirements:

1. Vertical alignment ≤5° deviation

2. Recommended bottom height: 1.8-2.2m

3. Adjacent cabinet spacing ≥20mm (cooling)

Maintenance Schedule:

• Monthly: Check fasteners & meter readings

• 3-Yearly: Full inspection (trip test, contact resistance)

Troubleshooting:

• Breaker trip: Eliminate short-circuit/overload before reset

• Voltage anomaly: Check incoming power & busbar connections

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Customization & Value-Added Services

Custom Options:

• Dimensional customization (CAD support)

• Special coatings: Acid/alkali-resistant (chemical environments)

• Multilingual labels: EN/ES/AR etc.

Value-Added Services:

• Training: Installation videos + on-site guidance

• Remote Diagnostics: IoT-enabled fault alerts (optional)

• Global Logistics: FOB/CIF terms, export packaging (crate + moisture barrier)

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Case Studies

Southeast Asia Textile Plant:

• Quantity: 120 units XL-21-12

• Special Requirements: Moisture/insect protection

• Results: Zero failures in 3 years

Middle East Oilfield Project:

• Custom Model: XL-21-EX (explosion-proof)

• Challenges: 55°C heat + sandstorms

• Solution: AC unit + IP54 protection