Editorial Technical Reference

Power Switchboard

This page explains how Power Switchboard is classified within Electrical Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A centralized electrical distribution panel that controls and protects power circuits within a power management system.

Product Specifications

Technical details and manufacturing context for Power Switchboard

Definition
The Power Switchboard is a critical component of the Power Management System that serves as the main distribution point for electrical power. It houses circuit breakers, switches, fuses, and monitoring devices to safely distribute electricity to various loads while providing overload and short-circuit protection. It enables centralized control, isolation, and monitoring of power circuits in industrial, commercial, or residential applications. The switchboard is designed for indoor or outdoor installation with a degree of protection from IP54 to IP65, and operates within an ambient temperature range of -5°C to 40°C. It is rated for a maximum system voltage of 400 V AC, a rated current of 630–4000 A, and a short-circuit withstand of 50–100 kA for 1 second. The rated frequency is 50/60 Hz, and the insulation voltage is 690 V. The enclosure is made of cold-rolled steel (SPCC) with a powder coating thickness of 60–120 μm, and the internal busbars are copper. Insulation is provided by polycarbonate components. Typical dimensions are 1800×800×600 mm (H×W×D), with a weight ranging from 150 to 300 kg depending on configuration. The switchboard complies with IEC 61439 for low-voltage switchgear and controlgear assemblies, IEC 60529 for degrees of protection, and IEC 60068-2-78 for humidity testing. The enclosure material is referenced to GB/T 11253, and the coating thickness follows ISO 12944. These standards serve as procurement and verification references; actual compliance must be confirmed with the legal manufacturer for the specific model. The switchboard provides centralized control, isolation, and monitoring of power circuits, ensuring proper load balancing and coordinated protection across the electrical system. It is essential for safe and reliable power distribution in various applications.
Working Principle
The Power Switchboard receives incoming power from the main supply or generator and distributes it through multiple outgoing circuits. Circuit breakers or fuses within the switchboard protect each circuit by interrupting current flow during overloads or faults. Control devices such as switches and contactors allow manual or automated operation, while monitoring instruments like voltmeters and ammeters provide real-time electrical parameters. The switchboard ensures proper load balancing, safety isolation, and coordinated protection across the electrical system. It operates within specified voltage, current, and environmental limits, and its design allows for safe maintenance and troubleshooting.
Common Materials
Galvanized Steel, Copper Busbars, Polycarbonate Insulation
Technical Parameters
ParameterTypical rangeNotes & selection driver
Rated Voltage400 V ACMax system voltageIEC 61439
Rated Current630–4000 ABusbar ratingIEC 61439
Short-Circuit Withstand50–100 kA1 s ratingIEC 61439
Degree of ProtectionIP54–IP65Indoor/outdoorIEC 60529
Operating Temperature-5–40 °CAmbientIEC 61439
Humidity5–95 %Non-condensingIEC 60068-2-78
Enclosure MaterialSPCCCold-rolled steelGB/T 11253
Coating Thickness60–120 μmPowder coatingISO 12944
Dimensions (H×W×D)1800×800×600 mmTypical floor-standing
Weight150–300 kgDepends on configuration
Rated Frequency50/60 HzDual ratingIEC 61439
Insulation Voltage690 VRated insulationIEC 61439

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Main Circuit Breaker
    Primary protection device that interrupts power during overloads or faults
    Material: Thermoplastic/Copper Alloy
  • Busbar System
    Conducts and distributes electrical current to various circuits
    Material: Copper or Aluminum
  • Metering Panel
    Houses voltage, current, and power monitoring instruments
    Material: Polycarbonate/ABS Plastic
  • Control Switches
    Manual operators for circuit control and isolation
    Material: Thermoset Plastic/Metal Alloy
  • Enclosure
    Protective housing providing mechanical support and safety
    Material: Galvanized Steel or Stainless Steel
  • Contactors
    Switch outgoing circuits on command from the control system.

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: N/A (electrical equipment)
other spec: IP rating: IP54 minimum, short-circuit withstand capacity: 50kA for 1 second, insulation voltage: 1000V AC
temperature: -20°C to +40°C (operating), -40°C to +70°C (storage)
Media Compatibility
✓ Indoor industrial environments ✓ Commercial building electrical rooms ✓ Clean manufacturing facilities
Unsuitable: Outdoor marine/coastal environments with high salt spray and humidity
Sizing Data Required
  • Total connected load (kVA)
  • Number of outgoing circuits required
  • Available installation space dimensions

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Insulation breakdown
Cause: Thermal degradation from overloads, moisture ingress, or contamination accumulation leading to partial discharge and eventual short circuits
Contact arcing and welding
Cause: Mechanical wear from repeated switching operations, contact oxidation, or insufficient contact pressure causing high resistance and localized overheating
Maintenance Indicators
  • Audible buzzing, crackling, or popping sounds from within the enclosure indicating arcing or loose connections
  • Visible discoloration, scorch marks, or melting on insulation materials, busbars, or terminal connections
Engineering Tips
  • Implement infrared thermography inspections quarterly to identify hot spots before failure occurs, focusing on connections, busbars, and switching components
  • Establish preventive maintenance schedule for contact cleaning and lubrication, torque verification of all electrical connections, and insulation resistance testing using megohmmeter

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
IEC 61439-1: Low-voltage switchgear and controlgear assemblies UL 891: Dead-Front Switchboards EN 61439-1: Low-voltage switchgear and controlgear assemblies

Quoted from the published standard.

Manufacturing Precision
  • Busbar alignment: +/- 1.5 mm
  • Enclosure flatness: 2 mm per meter
Quality Inspection
  • Dielectric withstand test (hipot test)
  • Infrared thermography for thermal performance
Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
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Manufacturers of Power Switchboard

4 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Dehler Technology Co., Ltd.
Yueqing, Wenzhou, Zhejiang (per official site), CN

The official XL-21 product page describes complete low-voltage power and lighting distribution equipment for AC 50 Hz, 380/660 V, rated current up to 630 A, also usable for some motor control, wall-mounted indoors with front operation and maintenance; the About page on the same domain states it was founded in 2016 in the Yanpan Economic Development Zone, Yueqing, developing and producing high- and low-voltage switchgear, prefabricated substations and circuit breakers. Component brands and breaking capacity are confirmed in the order proposal.

Listed on the company's own website · profile compiled by CNFX from public sources
View source page ↗ dehlertech.com · recorded 2026-10-05
Fujian Guozhiyun Information Technology Co., Ltd.
Fuzhou, Fujian, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “electrical distribution board”
View source page ↗ gzyelecauto.com · recorded 2026-09-18
Jiangxi YiKai Electric Co., LTD
Jiangxi, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “electrical distribution boards”
View source page ↗ cnecan.com · recorded 2026-08-29
VIOX Electric
Yueqing, Zhejiang, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “VIOX power distribution and panel accessories”
View source page ↗ viox.com · recorded 2026-09-15

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Frequently Asked Questions

What is the rated voltage and current of the Power Switchboard?

The rated voltage is 400 V AC, and the rated current ranges from 630 A to 4000 A, as per IEC 61439. These values are reference ranges; the actual ratings depend on the specific configuration and must be confirmed with the manufacturer.

What degree of protection does the switchboard offer?

The degree of protection is IP54 to IP65, according to IEC 60529. This indicates protection against dust and water jets, suitable for indoor or outdoor installation. Verify the exact rating for your model.

What standards does the switchboard reference?

The switchboard references IEC 61439 for low-voltage switchgear, IEC 60529 for protection, IEC 60068-2-78 for humidity, GB/T 11253 for enclosure material, and ISO 12944 for coating thickness. These are verification references; compliance must be confirmed with the manufacturer.

What are the typical dimensions and weight?

Typical dimensions are 1800×800×600 mm (H×W×D), and weight ranges from 150 to 300 kg depending on configuration. These are indicative; actual dimensions and weight may vary.

Related equipment

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Power Switchboard.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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