Products Distribution Box

Low-Voltage Power Distribution System

Material: Stainless Steel
Color: Gray
Place of Origin: Shanxi, China
Application: Industrial
Product Category: Distribution Box

Low‑voltage power distribution systems refer to complete sets of power distribution equipment with a rated AC voltage ≤1000 V and rated DC voltage ≤1500 V. Composed of circuit breakers, contactors, current transformers, busbars, metering instruments, protective components and cabinet frames, they deliver core functions including power conversion, distribution, control and protection. As the critical terminal segment of power systems for industry, building construction and municipal engineering, they comply strictly with IEC 61439‑1/2 and GB 7251 standards. Multiple structural variants such as fixed‑type and draw‑out type can be customized to suit application‑specific requirements.

Rated Voltage: AC 220 V / 380 V / 660 V (3‑phase 3‑wire / 4‑wire / 5‑wire)
Rated Frequency: 50 Hz / 60 Hz
Main Busbar Rated Current: 6 A ~ 6300 A
Short‑circuit Breaking Capacity: 6 kA ~ 100 kA
Ingress Protection Rating: IP30 ~ IP65
Compliance Standards: IEC 61439‑1/2, GB 7251.1, GB 7251.3
Protection Functions: Overload, short‑circuit, earth‑leakage, over‑voltage and under‑voltage protection

① High system integration. Functions such as power distribution, control, metering, protection and reactive‑power compensation can be integrated within one unit, simplifying power distribution circuits and reducing line power losses.
② Flexible configuration. Functional units including incoming cabinets, outgoing cabinets, capacitor compensation cabinets and metering cabinets can be custom‑configured for easy assembly and strong practical adaptability.
③ Excellent dynamic and thermal stability. High‑quality copper busbars and robust cabinet structures withstand high short‑circuit current impacts for reliable long‑term operation, with an annual failure rate ≤0.3%.
④ Convenient operation and maintenance. Modular design enables fast capacity expansion and servicing. Intelligent variants support remote monitoring and early fault warning to cut operational‑maintenance costs.
⑤ Energy‑saving performance. Matched reactive‑power compensation equipment improves power factor and reduces grid power loss for notable energy‑saving outcomes.

‑ Power and lighting distribution for industrial workshops and manufacturing plants
‑ Power‑distribution rooms in commercial complexes, office buildings and residential communities
‑ AC‑DC power distribution for photovoltaic, energy‑storage and charging‑pile projects
‑ Dual‑supply power distribution for hospitals, data centres and fire‑safety installations
‑ Temporary power distribution for municipal projects and construction sites
‑ Power‑distribution infrastructure for rail transit, ports and wharves

Q1: What is the rated‑voltage range for low‑voltage power‑distribution systems?
A: According to international standards, low‑voltage power‑distribution systems feature a rated AC voltage ≤1000 V and rated DC voltage ≤1500 V. Commonly‑used domestic systems are the AC 380 V three‑phase system and the AC 220 V single‑phase system.

Q2: What core equipment is included in a low‑voltage power‑distribution system?
A: Core equipment comprises low‑voltage switchgear / distribution boxes, circuit breakers (air‑circuit, moulded‑case and miniature), contactors, relays, energy meters, current / voltage transformers, reactive‑power‑compensation capacitors and surge‑protection devices.

Q3: How to select a suitable ingress‑protection rating?
A: IP30 / IP40 are suitable for dry indoor environments; IP54 applies to humid and dusty conditions; IP65 or higher is required for open‑air outdoor locations and sites exposed to water‑jet washing.