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As a commercial complex with multiple business formats, malls need to ensure power supply for various scenarios such as lighting, air
conditioning, elevators, commercial equipment, and fire emergency systems;
Wide load range: From 32A low-power (store lighting) to 800A high-power (floor-level power);
High reliability requirements: Power outages directly affect operations and safety (e.g., escalator shutdowns, cash register interruptions, fire protection failures);
High management complexity: Requires zoned control and rapid fault isolation to reduce operation and maintenance costs.
The project is equipped with 5 types of power distribution equipment + 1 set of single-phase ATS emergency systems, covering the entire process
from "main incoming line → regional distribution → branch control → emergency backup":
End Branch Control: 4P-32A Distribution Box
Functional Positioning: Store-level low-power distribution (e.g., clothing area lighting, small display cabinets).
4-pole (4P) design: Adaptable to three-phase four-wire systems, protecting phase lines and neutral lines simultaneously to avoid leakage hazards;
32A rated current: Precisely matches low-power loads, with automatic tripping for overload/short circuit to protect equipment.
Functional Positioning: Floor public areas (e.g., corridor lighting, small shop clusters).
10 independent branches: Can divide sub-circuits such as "lighting, sockets, advertising lights"; in case of faults,
only one branch is disconnected without affecting other areas;
40A load capacity: Meets the demand for parallel operation of multiple devices (e.g., multiple freezers + lighting in catering areas).
Medium Load Distribution: 125A Distribution Box
Functional Positioning: Floor-level power hub (e.g., ventilation systems, medium-sized air conditioning units).
High load capacity + stable power distribution: Copper busbars reduce energy loss, ensuring continuous operation of floor-level
power systems (e.g., exhaust fans, escalators);
Enhanced protection: In addition to overload/short circuit protection, some models support over/under-voltage protection to adapt to complex mall power grids.
Large Equipment Power Supply: 200A-7 Branch Distribution Box
Functional Positioning: Main equipment clusters (e.g., central air conditioning hosts, large escalator groups).
7 high-power branches: Each branch can carry large equipment (e.g., 380V air conditioning units with single-branch current up to 30-50A);
Flexible expansion: Reserved wiring positions support future equipment additions (e.g., new commercial electric ovens).
Core of Emergency Guarantee: Single-Phase ATS Cabinet
Functional Positioning: Uninterrupted power supply for critical single-phase loads such as fire protection, monitoring, and cash registers
(e.g., emergency lighting, POS machines, cameras).
Core Mechanism:
Automatic switching: When the main power supply fails or is abnormal, switches to backup power (e.g., diesel generators) within ≤0.2 seconds to ensure key systems remain operational;
Single-phase adaptation: Optimized for 220V single-phase loads, avoiding resource waste of three-phase ATS;
Intelligent monitoring: Some models are equipped with display screens to real-time monitor main/backup power status and automatically alarm for faults.
System Design: Hierarchical Protection + Emergency Redundancy
Power Distribution Logic:
800A Main Box → 200A/125A Regional Boxes → 40A-10 Branch/4P-32A End Boxes↓ (Emergency Backup)
Equipment-level: Circuit breakers in each distribution box provide overload and short-circuit protection;
System-level: ATS cabinets achieve main/backup power redundancy to avoid long-term power outages;
Physical-level: IP30 protection rating (dust and splash proof), with standardized internal wiring (color-coded phase/neutral lines,
secure terminals to prevent sparking).
Operational Guarantee:
Avoid power outage losses (e.g., escalator shutdowns causing customer complaints, cash register interruptions affecting transactions);
Zoned control reduces energy consumption (e.g., turning off some branches during non-business hours).
Safety Upgrade:
24/7 operation of fire protection/monitoring systems (guaranteed by ATS cabinets), complying with commercial building fire codes;
Automatic tripping for overload/short circuits reduces the risk of electrical fires.
Efficient Operation and Maintenance:
Independent branch control enables fault location within ≤5 minutes;
Visual status of ATS cabinets reduces manual inspection costs.
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