Home page

Application scenarios and selection of AC/DC switchgear

Release time:

2025-07-03

Author:

Source:

Abstract

AC/DC Power Distribution Cabinet It is a key device in power distribution systems, widely used in data centers, industrial, commercial, and public facilities. Its core function is to distribute, monitor, protect, and manage power supplies. Specific application scenarios and selection principles are as follows:

I. Application Scenarios

1. Data Center Server Room

Core Function ：
- Power Distribution and Monitoring : Provides stable AC/DC power supply for servers, network equipment, UPS, etc.
- Fault Warning : Real-time monitoring of current, voltage, and power parameters, automatic alarm for exceeding limits (such as overload, circuit breaker tripping).
- High-Precision Energy Efficiency Management : Collects power data through an intelligent monitoring system (such as Ankerui products) to optimize energy consumption.
Typical Configuration ：
- Dual input (main and backup power supply) + modular design + hot-swappable circuit breaker + lightning protection.
- Example: Ankerui precision power distribution cabinet supports single-phase/three-phase AC (220V/380V) and DC (-48V) power supply to meet the needs of IT equipment.

2. Industrial Field

Core Function ：
- Production Equipment Power Supply : Provides reliable AC/DC power supply for machine tools, production lines, and automated equipment.
- Environmental Adaptability : High protection level (IP54/IP65) to cope with high temperature, high humidity, and dust environments.
Typical Configuration ：
- High-current circuit breaker (such as 630A~1000A) + leakage protection module + heat dissipation design.
- Example: Taion Energy power distribution cabinet is used in chemical plants, and corrosion-resistant materials are suitable for high salt spray environments.

3. Commercial and Public Facilities

Core Function ：
- Multi-Scenario Power Supply : Power supply for lighting, elevators, and fire-fighting equipment in shopping malls, hospitals, and airports.
- Safety Redundancy : Dual input + ATS (Automatic Transfer Switch) ensures power continuity.
Typical Configuration ：
- Three-phase five-wire AC (380V) + precision power distribution module + electrical fire monitoring.
- Example: A certain hospital uses a dual-power distribution cabinet to ensure uninterrupted operation of equipment in the operating room.

4. Residential Area

Core Function ：
- Smart Home Power Supply : Provides efficient power distribution for home appliances, floor heating, and security systems.
- Energy Efficiency Optimization : Monitors electricity consumption through smart meters to reduce energy consumption.
Typical Configuration ：
- Single-phase input (220V) + modular loop design + leakage protection.
- Example: Villa area power distribution cabinet integrates photovoltaic grid-connected function to achieve self-generation and self-consumption.

II. Selection Principles

1. Select According to Power Type

AC Power Distribution Cabinet ：
- Suitable for AC equipment (such as air conditioners, motors), rated voltage 220V/380V, frequency 50Hz.
- Typical applications: data centers, commercial buildings, industrial equipment.
DC Power Distribution Cabinet ：
- Suitable for DC equipment (such as communication base stations, LED lighting), rated voltage -48V/240V.
- Typical applications: communication rooms, rail transit signaling systems.

2. Select According to the Number of Input Lines

Single Input ：
- Low cost, suitable for non-critical loads (such as ordinary lighting).
Dual Input ：
- Provides redundant power supply to ensure continuous operation of critical loads (such as data center servers).
- Configure ATS (Automatic Transfer Switch) or STS (Static Transfer Switch) for seamless switching.

3. Select According to Capacity Requirements

AC Power Distribution Cabinet Capacity ：
- Input current: 63A~1000A (Ankerui products support 63A~630A input).
- Branch current: 6A~630A (configured according to equipment power level).
DC Power Distribution Cabinet Capacity ：
- Input current: 6A~1000A (commonly used 200A~400A in communication base stations).
- Branch current: 6A~125A (adapts to different load requirements).

4. Select According to Functional Requirements

Basic Functions ：
- Circuit breaker protection (short circuit, overload), power metering, temperature monitoring.
Advanced Functions ：
- Intelligent Monitoring : Integrated touch screen, remote communication (Modbus/RS485/5G).
- Harmonic Suppression : Configure filter to reduce THDu (Total Harmonic Distortion).
- Lightning Protection : SPD (Surge Protection Device) adapts to different lightning levels (such as IIC level).
- Modular Expansion : Supports later expansion (such as adding circuits or energy storage modules).

5. Select According to Reliability and Safety

Protection Level ：
- Indoor: IP54 (dust and splash proof).
- Outdoor: IP65 (dust and waterproof).
Safety Standards ：
- Compliant with GB/T 4943 (Information Technology Equipment Safety), YD/T 944 (Communication Power Surge Protection), etc.
Brand and Certification ：
- Prioritize brands with CCC and CE certifications.

6. Select based on ease of installation and maintenance

Structural Design ：
- Modular design (easy component replacement), compatible with vertical/horizontal wiring.
- Example: Ankerui's head cabinet supports quick-plug circuit breakers, reducing maintenance time by 50%.
Heat Dissipation and Ventilation ：
- Natural ventilation or forced air cooling (such as fan + heat dissipation holes), ensuring the internal temperature is below the ambient temperature by 15℃.

III. Notes

Load Matching : Calculate the current based on the actual load power (kW) to avoid overload.
Capacity Expansion Reserve : Reserve 10%~20% capacity to accommodate future equipment expansion needs.
Environmental Adaptability : In high-temperature, high-humidity, and salt-spray environments, corrosion-resistant materials (such as 304 stainless steel) should be selected.
Cost Control : Balance functionality and cost; basic head cabinets can be selected for non-critical scenarios.

Through reasonable selection, AC/DC head cabinets can significantly improve the stability, safety, and intelligence level of the power system, meeting the needs of diverse scenarios.

Key words:

Installation and maintenance of AC/DC switchgear

Core functions of a photovoltaic grid-connected cabinet

Hunan Chengyuan Electrical CO.,LTD