News | company news | Aug 05,2026
The power density of modern data centers is increasing significantly due to the rapid advancement of AI, cloud computing, and high-performance computing (HPC).
Energy management in traditional data centers has primarily focused on monitoring mains power and UPS. However, with the emergence of high-performance AI servers and GPU-based computing platforms, infrastructure engineers must gain a more detailed understanding of various levels of energy consumption, such as the following.
Accurate monitoring of electrical circuits is essential for improving energy efficiency, preventing overloads, and optimizing data center infrastructure.
To perform real-time power measurements without interrupting operations, plug-in current transformers have become an increasingly important sensing solution in modern data center power monitoring systems.
Increased power density causes new problems.
Standard server racks generally consume relatively little power. On the other hand, AI servers equipped with GPUs require much more power.
Modern data centers designed for artificial intelligence are facing numerous challenges.
If the load on IT devices is high, power distribution between racks and points may become uneven.
If monitoring is inaccurate, engineers may face the following problems.
Circuit overload
Unexpected regulations in the energy sector
The reliability of the system has decreased.
Data center operators are continuously striving to optimize operations.
To achieve these goals, it is necessary to measure energy consumption for the actual load as accurately as possible.
Transparency of real-time infrastructure
Modern DCIM (Data Center Infrastructure Management) systems require detailed electrical equipment data from the following sources.
Therefore, energy monitoring devices become an important element of intelligent data center management.
Problem 1: Data centers struggle with responding to power outages.
One of the biggest challenges for existing data centers is upgrading monitoring technology.
Conventional current transformers generally require the following:
However, most data centers operate 24 hours a day, 365 days a year.
Each termination process can result in the following outcomes.
Solution: Non-invasive current measurement
By using split-type current transformers, engineers can install sensors directly around existing wires or conductors without interrupting the electrical circuit.
The installation procedure is very simple.
For this reason, split-core CT technology is ideal for the following applications.
The Branch Circuit Monitoring System (BCMS) measures electrical parameters of downstream circuits.
Typical architectural style:
public power supply
|
transformer
|
Main distribution panel
|
Uninterruptible Power Supply
|
Power distribution unit
|
Branch circuit monitoring
|
Rack mount equipment
In this configuration, a current transformer is installed in the bypass circuit for measurement.
today
Energy consumption
Load balancing
Energy Consumption Trends
In data center applications, engineers typically require current transformers with the following characteristics.
Problem caused by the existing 5A output current transformer.
Conventional current transformers generally use a secondary winding with an output current of 5A.
Despite being widely used in the industry, the following components may be required for operation.
Additional converter
Load-bearing capacity
Low-voltage current transformers offer many advantages to modern electronic monitoring systems.
Advantages of a 333mV output voltage pulse current transformer.
A current transformer with an output voltage of 333mV converts the measured current into an analog low-voltage signal that can be directly processed by an electronic monitoring system.
Common signal transmission paths:
The advantages are as follows.
1.Safer signal transmission
Compared to conventional high-current secondary output, low-voltage output reduces the risk associated with the secondary circuit.
2.Optimal System Integration
The output voltage of 333mV is suitable for the following applications.
Intelligent power distribution unit
Multi-channel video surveillance card
Energy Management System
Data collection module
3.Suitable for high-density monitoring.
Large-scale data centers may require hundreds or thousands of measurement points.
Simplified version of the low-voltage output current transformer:
Method for Selecting a CT Module with an Independent Control Unit Suitable for Data Center Applications
The selection of an appropriate current transformer depends on several technical parameters.
Rated current range
The technician must select the current transformer based on the actual current in the circuit.
Representative application fields:
| Application | Standard current |
| Monitoring rack branch | 16A-125A |
| PDU monitoring | 100A~400A |
| UPS output power monitoring | 400A~1000A |
The HEYI KCT series supports a wide current range, from low-current shunt circuits to high-current power supplies.
Output type
The results required by the monitoring system are different.
Output current (mA)
Target Audience:
Target Audience:
The HEYI KCT series supports low-voltage output with an output current in milliampere units and an output voltage of 333mV.
Precision
Accuracy is very important in energy monitoring systems.
General Requirements:
Improved precision offers the following benefits.
Energy Analysis
Load optimization
Business decision-making
HEII solution equipped with split current transformer. Suitable for power monitoring in data centers.
HEYI’s KCT series plug-in current transformers are designed for applications requiring flexible installation and stable current measurement.
The main features are as follows.
The split core design makes installation easy.
With its compact design, it is suitable for installation in limited spaces.
Multiple liquidity ratio options
Version with output current in mA and voltage of 333mV.
Precision class 0.5/1.0
Fire-resistant case UL94-V0
The KCT series supports a wide range of current measurement applications, from small branch circuits to large-scale distribution systems.
Representative application fields:
Future Trend: Independent power converter for energy management in AI-supported data centers.
With the increase in energy demand driven by AI-equipped computing systems, more detailed and advanced energy monitoring is required in data centers.
Moving forward, the energy consumption monitoring system is scheduled to be developed in the following direction.
An independent current transformer with a low-voltage output plays an important role in this variation.
The conclusion is
Modern data centers utilizing artificial intelligence and cloud technology require more detailed electrical monitoring than ever before.
Pulse current transformers provide engineers with the following practical solutions.
Branch circuit monitoring
Smart PDU Measurement
UPS monitoring
Energy management optimization
Split current transformer technology, which offers advantages such as installation flexibility, low-voltage output capability, and compatibility with modern monitoring systems, is becoming an essential component of next-generation data center infrastructure.
Compay：HEYI Electrical Co., Ltd.
Brand: HEYI/ASCT
Contact: Bethy
E-mail: heyi@heyiele.com
Tel: 86-13968747975
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