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Distribution Panels

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Industrial Distribution Panels Built to UL/IEC Standards

 

Industrial distribution panels engineered for power routing, circuit protection, and system reliability. Built in our 15,000 sqm ISO 9001 facility utilizing CNC turret punching, automated busbar bending, and rigorous dielectric testing. Designed for electrical contractors, panel builders, and industrial OEMs requiring exact technical compliance and dependable lead times.

 
 

Technical Specifications

 

Parameter

Specification Range

Standard Compliance

Rated Voltage

Up to 690V AC, 3-phase

IEC 61439-1/-2, UL 67

Main Busbar Rating

Up to 4000A

ETP Copper (99.9% IACS)

Short-Circuit Rating (SCCR)

Up to 65kA / 1s

Tested per IEC standard

Enclosure Protection

NEMA 1, 3R, 4X / IP54 to IP65

Carbon Steel / Stainless Steel 304

Surface Finish

Epoxy-polyester powder coat

80–120 micron thickness

 

Low Voltage Distribution Panels

 

Product Selection & Configuration

Selecting the correct distribution panel requires evaluating load profiles, environmental conditions, and physical constraints.


Amperage & Busbar Sizing: Match main breaker rating to incoming supply. Specify copper or tin-plated copper busbars based on temperature rise limits and ambient conditions.


Enclosure Rating: Indoor environments typically require NEMA 1 / IP54. Outdoor or corrosive installations require NEMA 4X / IP65 stainless steel construction.


Incoming & Outgoing Configuration: Main lug only (MLO) or main circuit breaker (MCB). Specify top/bottom cable entry knockouts or removable gland plates.


Short-Circuit Coordination: Verify upstream protective device coordination to ensure adequate SCCR for the installation site.

 

 
Manufacturing & Quality Control
 

Internal manufacturing processes ensure dimensional accuracy and electrical safety from raw material to final assembly.

01/

Sheet Metal Fabrication: Trumpf CNC laser cutting and Amada bending machines maintain enclosure tolerances within +/- 0.1 mm. Seams are continuous-welded and ground flush.

02/

Busbar Processing: CNC copper busbar punching, cutting, and bending centers ensure precise fitment inside the enclosure without mechanical stress on terminal points.

03/

Assembly & Wiring: DIN rail mounting, component integration, and torque verification performed using calibrated pneumatic tools.

04/

Testing & Inspection: Every panel undergoes dielectric withstand testing (hipot test at 2.5kV for 1 minute), insulation resistance measurement, and mechanical operation checks before crating.

 

Application Environments

Commercial Buildings

Lighting and HVAC power distribution boards for high-rise facilities.

 

Industrial Automation

Machine line control panels housing PLC integration alongside power distribution.

 

Renewable Energy

Combiner and distribution integration for commercial solar inverter skids.

 

 

FAQ

 

Q: What standards and certifications do your distribution panels meet?

A: Panels are manufactured to comply with IEC 61439-1/-2 and UL 67 standards. Component selection utilizes UL-listed or CE-certified breakers, contactors, and terminal blocks. Test reports and certificates of conformity accompany each shipment.

Q: Can you build custom enclosures with non-standard dimensions?

A: Yes. Custom sheet metal fabrication allows modification of enclosure height, width, depth, and mounting hole configurations based on CAD drawings or project specifications.

Q: What is the standard lead time for custom distribution panel orders?

A: Standard production lead time ranges from 3 to 5 weeks following drawing approval. Expedited scheduling is available for urgent MRO or project rollout requirements.

Q: How do you prevent busbar oxidation and overheating?

A: Main busbars utilize high-conductivity electrolytic copper (99.9% IACS). Connection joints are torque-verified, and joints can be tin-plated or silver-plated upon request to minimize contact resistance and thermal buildup under full load.

Q: What information is required to request a quotation?

A: Submit single-line diagrams (SLD), bill of materials (BOM), enclosure dimensional constraints, environmental rating requirements (NEMA/IP), and required delivery timelines. Engineering review typically returns a formal quote within 24–48 hours.

Q: How are completed distribution panels packaged for international shipment?

A: Units are wrapped in moisture-barrier film, secured to ISPM 15 compliant heat-treated wooden pallets, and reinforced with edge protectors to prevent transit damage during ocean or air freight.

As one of the most experienced distribution panels manufacturers and suppliers in China, we also support customized service. We warmly welcome you to buy high quality distribution panels from our factory. If you have any enquiry about pricelist, please feel free to email us.