Nauru power distribution box size representation

Nauru power distribution boxes are prefabricated, modular units designed for 10/0.4kV networks, with robust construction, IP23D–IP55 protection, and transformer capacities ranging from 50 kVA to 1600 kVA.

General Overview

Nauru power distribution boxes, including ZBW-type prefabricated substations and JP outdoor integrated distribution boxes, are complete sets of distribution equipment combining high-voltage switchgear, distribution transformers, low-voltage switchgear, energy metering, and power factor compensation devices in one or multiple enclosures . They are suitable for urban buildings, industrial sites, airports, and data centers, providing safe, reliable, and compact power distribution.

Structural Features

• Base Frame: Welded channel steel for high strength and rigidity .
• Enclosure Material: Composite materials with strong radiation resistance or 2 mm galvanized steel sheet for outdoor cabinets .
• Roof Design: Slightly slanting with 50 mm overhang to prevent water ingress .
• Protection Level: IP23D for standard prefabricated substations; IP55 for LT distribution boxes .
• Earthing: Two solid earthing points on either side .
• Locking System: Godrej-type 3-position locking with galvanized manual lock provision .
• Door Hinges: Concealed from outside for security .

Electrical Specifications

• Rated Voltage: 10/0.4 kV for ZBW-type; 380V AC for low-voltage switchgear .
• Rated Frequency: 50 Hz .
• Transformer Capacities: 50, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1000, 1250, 1600 kVA .
• Rated Current: Up to 3150A for low-voltage switchgear .
• Bus Bars: Copper flat bars (25x4 mm) with insulated tubing or phase-colored paint .
• Circuit Protection: MCCBs with magnetic trip release and manual reset; overload protection recommended .

Environmental and Installation Conditions

• Ambient Temperature: -25°C to 40°C .
• Altitude: ≤ 1000 m .
• Relative Humidity: ≤ 90% monthly average at 25°C .
• Wind Speed: ≤ 34 m/s .
• Ice Thickness: ≤ 20 mm .
• Pollution Level: II or III .
• Ground Pressure: Can withstand 20 tons .
• Slope: Ground slope not exceeding 5° .

Dimensions

Exact dimensions vary depending on transformer capacity and configuration. Illustrative tolerances allow ±10% variation over specified dimensions, with provisions for lighting, cable glands, and bus bar clearance . Custom sizes can be fabricated to meet specific site requirements, including indoor or outdoor installation.

Additional Features

• Indicator Lights: For power status monitoring .
• Grounding Protection: All sockets include grounding .
• Cable Glands: Heavy-duty, double compression type for incoming and outgoing cables .
• Aesthetic Design: Harmonious color and compact footprint for urban or industrial environments . Nauru power distribution boxes are modular, durable, and adaptable, making them suitable for a wide range of applications from industrial plants to data centers, with flexibility in transformer capacity, protection level, and environmental tolerance.