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State Grid Standard Distribution Box Specifications Table

Optical access and telecom site reference Published 16 Oct 2024

Use this reference to prepare product questions for CGWEB NETWORKS. Check interfaces, capacity, protection and installation requirements against the current product documentation.

State Grid low-voltage distribution boxes follow Q/GDW 11221-2023, specifying material, protection, bus bar, MCCB, earthing, and cable gland requirements. Key Specifications TableParameterRequirementBox TypeLow-voltage integrated distribution box (indoor/outdoor)Material2 mm GI sheet steel with reinforced channelsRoof DesignSlightly slanting with 50 mm overhang front and backLocking SystemGodrej Type 3-position locking; separate galvanized manual lock provisionDoor HingesConcealed from outsideEarthing PointsTwo solid earthing points on either sideProtection LevelIP-55 (type-tested at CPRI or approved lab)Bus Bar ArrangementOne bus bar with 4-pole MCCB; outgoing feeder with 2 sets of 3-pole MCCBsBus Bar MaterialCopper flat, 25x4 mm, insulated with red, yellow, blue, black tubing or phase-colored paintCable GlandsHeavy-duty, double compression brass glands for incoming and outgoing cablesMCCB StandardsIS: 13947, magnetic trip release with manual reset; neutral unbalance protection with test reportInsulation & BarriersMetallic/heat-resistant insulating barriers between MCCBsDimensionsIllustrative; tolerances ±10% over specified dimensionsAdditional FeaturesProvision for lighting inside cabinet; non-detachable nameplate; purchaser identification marksDesign and Technical NotesStructural Reinforcement: The box body must be sufficiently reinforced to maintain rigidity and durability under operational conditions.

Quality Control: Door handles, locks, and hinges must meet quality standards; substandard components may lead to rejection. Electrical Safety: Adequate clearance between bus bars and box body is required to comply with LT supply rules. Testing: Type test certificates for IP-55 protection and MCCB compliance must be provided from CPRI or government-approved laboratories.

Customization: Boxes may include modular capacitors, intelligent fusion terminals, and SVG rails/connectors as per station requirements. These specifications ensure safety, reliability, and compliance with State Grid standards for low-voltage distribution systems, covering both mechanical and electrical design requirements for integrated distribution boxes.

State Grid Standard Distribution Box Specifications Table - CGWEB NETWORK INFRASTRUCTURE [PDF]

State Grid Standard Distribution Box Specifications Table

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