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Metering Power Distribution Cabinet

Metering Power Distribution Cabinet

The Metering Power Distribution Cabinet manages electrical energy distribution, branch-circuit metering, and thermal protection in heavy industrial infrastructure and commercial facilities.

Product Overview

 

The Metering Power Distribution Cabinet manages electrical energy distribution, branch-circuit metering, and thermal protection in heavy industrial infrastructure and commercial facilities. Each assembly integrates multi-channel power meters with commercial-grade switching components inside a modular, floor-standing sheet metal housing. It handles bulk power intake, monitors electrical performance parameters across multiple sub-feeds, and protects downstream equipment from overloads and short circuits. 

 

Technical Specifications

 

Parameter

Specification Details

Rated Operational Voltage (Ue)

AC 380V / 400V / 480V (3-Phase 4-Wire)

Rated Current (In)

Up to 3200A (Custom-engineered per feeder schedule)

Rated Frequency

50Hz / 60Hz

Short-Circuit Withstand Current (Icw)

50kA / 65kA (1s rated)

Metering Accuracy Class

IEC 62053-22 Class 0.5S (Active Energy)

Enclosure Protection Rating

IP54 / IP31 (IP65 available for corrosive environments)

Busbar Material

Tm-grade Electrolytic Copper (Tin-plated, conductivity >= 98% IACS)

Communication Protocols

RS485 (Modbus-RTU), Optional Ethernet (Modbus-TCP / SNMP)

Standard Dimensions (H x W x D)

2200mm x 800mm x 800mm (Modular scalable configuration)

Surface Finish

Electrostatic Epoxy-Polyester Powder Coating (RAL 7035 texture)

 

Key Features

 

Integrated Multi-Circuit Monitoring: Houses modular power meters directly capturing voltage, current, active/reactive power, power factor, and individual harmonic distortion without requiring external transducers.

Compartmentalized Internal Architecture: Features physical barriers separating incoming mains, main busbar chambers, outgoing functional breaker units, and low-voltage control wire raceways to contain localized arcs.

Optimized Thermal Management: Engineered with internal computational fluid dynamics (CFD) considerations, utilizing louvered side panels and optional forced-air cooling modules to maintain temperature rise limits under continuous 100% load.

High-Purity Bolted Busbar Assemblies: Main busbars utilize electrolytic grade copper with torque-calibrated bolted joints marked with seal paint to identify loosening during routine maintenance cycles.

Standardized Fieldbus Integration: Built-in RS485 physical layer supporting Modbus-RTU protocol for seamless integration into supervisory control and data acquisition (SCADA) or building management systems (BMS).

 

Applications

 

Data Centers & Colocation Facilities: Sub-distribution rack feeds, Computer Room Air Handler (CRAH) power management, and real-time branch PDU metering.

Automated Industrial Plants: Centralized energy tracking and protection for high-draw CNC machining lines, robotic assembly cells, and continuous-process automation.

Commercial Real Estate: Main electrical utility rooms in high-rise office towers, retail complexes, and transit hubs requiring tenant sub-metering and load profiling.

Renewable Energy Systems: Inverter output aggregation and auxiliary house-load distribution within utility-scale solar or wind farm balance-of-system (BOS) skids.

 

Customization

 

Cabinets are engineered directly from client-submitted single-line diagrams (SLDs) and electrical layout constraints.

 

Enclosure Architecture: Dimensions, top/bottom removable gland plates, plinth structural heights, and custom color RAL specifications.

Component Integration: Specified brand preferences for circuit breakers and contactors (e.g., Schneider Electric, ABB, Siemens, Eaton) to match facility maintenance inventories.

Protection & I/O Expansion: Allocation of Type 1+2 Surge Protection Devices (SPD), auxiliary contact blocks, and expanded digital I/O expansion cards.

 

Manufacturing & Quality Control

 

Production relies on computerized sheet metal tooling and systematic electrical testing procedures to verify mechanical tolerances and dielectric safety.

 

Sheet Metal Fabrication: CNC laser cutting, CNC turret punching, and multi-axis hydraulic press brake bending maintain structural tolerances within +/-0.2mm across modular panel frames.

Powder Coating Line: Multi-stage chemical immersion pre-treatment followed by electrostatic epoxy powder application, cured in a thermal oven at 200°C to achieve a salt-spray resistance rating exceeding 500 hours.

Busbar Fabrication: Automated copper bar punching, bending, and burr-free edge finishing prior to tin-plating and torque assembly.

Factory Acceptance Testing (FAT): Every assembled cabinet undergoes a 2.5kV AC dielectric withstand voltage test, insulation resistance verification, control circuit continuity check, and communication handshake validation before crating.

 

Certifications & Documentation

 

Design Standards: Engineered and type-tested in compliance with IEC 61439-1/-2 specifications for low-voltage switchgear and controlgear assemblies.

Quality Framework: Produced under an ISO 9001 certified manufacturing quality management system.

Documentation Package Provided: Complete delivery includes As-Built Single Line Diagrams (SLDs), General Arrangement (GA) layout drawings, Bill of Materials (BOM), individual meter calibration logs, and routine FAT electrical test sheets.

 

Packaging & Delivery

 

Export-Grade Crating: Secured onto ISPM 15 compliant heat-treated solid wood pallets, enclosed in heavy-duty multi-layer moisture-barrier foil with active desiccant packets, and packed inside reinforced plywood crates.

Lifting & Rigging: Fitted with removable top crane lifting eyes and heavy-gauge forklift base channels for safe handling during warehouse or site offloading.

Lead Times: Standard configurable units ship within 4 to 6 weeks; specialized engineered-to-order (ETO) projects depend on component availability and SLD verification timelines.

 

FAQ

 

Q: Can the internal power meters interface directly with our existing third-party SCADA or BMS platform?

A: Yes. The integrated meters include dual RS485 ports running standard Modbus-RTU. Optional Ethernet gateway modules supporting Modbus-TCP or SNMP are available for IP-based network polling.

Q: What is the standard short-circuit current rating (SCCR), and can it be increased for high-fault sites?

A: Standard assemblies are certified for 50kA or 65kA at 1 second. Higher short-circuit ratings (up to 85kA) can be engineered by specifying high-breaking-capacity main breakers and reinforcing internal busbar mechanical bracing.

Q: What format and timeline are required for reviewing custom single-line diagrams (SLDs)?

A: Clients provide SLDs in DWG, PDF, or EPLAN format. Our electrical application team reviews loading parameters, performs thermal checks, and returns 2D/3D approval drawings within 3 to 5 business days.

Q: Do you accommodate third-party factory inspections (TPI) before shipment?

A: Yes. We regularly host client-appointed independent inspectors (such as SGS, Bureau Veritas, or TÜV) on-site to conduct physical inspections, witness routine FAT testing, and review calibration documents.

Q: What warranty coverage applies to the enclosure structure and internal electrical components?

A: We provide a 24-month comprehensive warranty covering structural weld integrity, surface coating adhesion, and active functional performance of the internal switching and metering hardware from the date of site commissioning.

Q: What is the typical lead time difference between standard designs and fully custom builds?

A: Standard baseline layout templates ship in 4 weeks. Custom enclosures involving non-standard dimensions, custom feeder distributions, or specific breaker brand integrations require 6 weeks following drawing sign-off.

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