Proven Capability! NGI Enables Power Testing for Multiple Global TOP AIDC Enterprises

AI Server Power Systems Enter the High-Power Era

With the comprehensive deployment of the “East Data, West Computing” strategy and the integration of computing power and energy efficiency becoming a key national development focus, competition in the AI industry is shifting from “transistor density” toward “power efficiency”.

The electrical architecture of AIDC infrastructure is undergoing a profound transformation — evolving from traditional UPS-based architectures toward 800V HVDC systems, while Solid-State Transformer (SST) technologies are gradually moving from conceptual planning into practical implementation.

However, the rapid increase in voltage levels and the demand for ultra-fast dynamic response across power delivery chains create extremely demanding challenges for test equipment, particularly in terms of high-voltage load simulation, dynamic response capability, and power density.

To address these challenges, NGI’s high-performance high-power electronic loads have already been deployed in the R&D environments of global TOP-tier AIDC enterprises, providing critical support for the validation and implementation of next-generation power architectures.

In this article, we will share how NGI’s high-performance high-power electronic loads are applied in high-voltage HVDC power supplies, Power Shelf systems, and other key testing scenarios at global TOP AIDC manufacturers.

Case 1: 72kW HVDC Multi-Condition Load Testing

Customer Background

Customer A is a globally leading provider of critical digital infrastructure solutions. As a key 800V power partner for NVIDIA’s next-generation AI computing clusters, the company is committed to integrating power systems, cooling infrastructure, and IT loads across the entire value chain, providing full-stack integrated solutions covering infrastructure, energy efficiency management, and lifecycle services.

Testing Requirements

The customer planned to perform output performance testing on its self-developed and manufactured HVDC power modules. The testing requirements included:

High Voltage and High Power

• ● Load capability ≥1200V

• ● Load power ≥72kW

High Dynamic Load Simulation

• ● Current slew rate ≥2A/μs

• ● Used to verify output stability under rapid GPU load transitions

Complex Sequence Editing

Support more than 60,000 sequence steps to simulate realistic and complex load profiles.

Expandable Power Upgrade

The existing platform should support future power expansion to meet higher-power testing requirements.

NGI Testing Solution

NGI configured the N69200 Series High-Performance High-Power Electronic Load for the customer. With its high power capability, high dynamic performance, and comprehensive functionality, the solution perfectly matched the customer’s actual testing requirements.

Wide-Range High Power Capability

Provides 1200V/2880A/72kW wide-range load capability to meet customer testing requirements.

High Dynamic Load Simulation

Supports current slew rates of tens of A/μs, enabling simulation of rapid load step changes.

Comprehensive Functions

Supports importing sequence files with more than 60,000 test steps to reproduce complex real-world server operating conditions.

Expandable Architecture

Supports optical fiber parallel connection for MW-level power expansion, meeting the testing requirements of large-scale HVDC power systems.

Case 2: 120kW HVDC High-Voltage DC Power Testing

Customer Background

Customer B has accumulated nearly four decades of expertise in power electronics. With a leading position in the HVDC market, the company’s business covers three major areas: advanced power supplies, data centers, and clean energy. It serves as a key power infrastructure partner for leading AI computing clusters.

Testing Requirements

This project focused on HVDC R&D testing for AI computing power systems. The solution needed to satisfy high-voltage and high-power requirements while also supporting wide-frequency dynamic response, automated integration, and rack deployment.

High Voltage and High Power

• ● Operating voltage ≥1500VDC

• ● Operating current ≥600A

• ● Power ≥120kW

Wide Dynamic Range

• ● Dynamic load simulation from 50Hz to 25kHz

Test Environment Requirements

• ● Overall system height ≤2m

• ● Cabinet width ≤1.7m

NGI Testing Solution

NGI configured the N69200 Series High-Performance High-Power Electronic Load, leveraging its high-voltage capability, high power density, and high-speed high-precision performance to fully meet customer requirements.

High-Voltage Load Capability

The N69200 Series supports globally unique 1600V/2400V ultra-high-voltage load testing, meeting the customer’s 1500V HVDC testing requirements.

High Power Density

With 3U/5kW high power density, the delivered system features:

• ● Cabinet height ≤2m

• ● Cabinet width ≤1.2m

Effectively reducing the customer’s on-site testing space requirements.

High-Speed and High-Precision Performance

Supports 30kHz dynamic current loading. The three-range current measurement design achieves measurement accuracy up to:

0.04% + 0.04% F.S.

Meeting requirements for high-speed dynamic load simulation.

Case 3: Power Shelf Testing

Customer Background

Customer C ranks first in China’s server market in terms of domestic server sales. The company maintains a leading position in the industry and has strategic business layouts covering computing infrastructure, digital transformation solutions, and smart energy solutions.

Testing Requirements

The customer needed to perform low-voltage high-current load testing on its Power Shelf modules.

The main challenge was achieving continuous 2000A current loading under low-voltage conditions, while controlling voltage drop, connection heating, and protection risks.

Low Voltage and High Current

• ● Output voltage: 49V–51V

• ● Maximum output current: 1800A

• ● Requires fast current response

Safety and Reliability

• ● Reliable thermal management

• ● Built-in OVP, OCP, and OTP protection functions

Space Efficiency

Minimize equipment footprint and save testing space.

NGI Testing Solution

NGI provided the N69220-150-2000 High-Power Electronic Load, which offers advantages in high-speed loading, safety reliability, and power density, perfectly matching the customer’s low-voltage high-current Power Shelf testing requirements.

Low-Voltage High-Current Loading

The selected electronic load supports up to 2000A current loading, covering the customer’s testing conditions.

Meanwhile, it provides μs-level fast current response capability, meeting dynamic load testing requirements for Power Shelf modules.

Multiple Protection Functions

The equipment adopts air cooling design and integrates:

• ● OVP (Over Voltage Protection)

• ● OCP (Over Current Protection)

• ● OPP (Over Power Protection)

• ● OTP (Over Temperature Protection)

Enhancing system safety and operational stability.

High Power Density

Featuring 3U/6kW high power density, the equipment adopts a tray-based delivery format with a standard 19-inch width, significantly reducing the customer’s testing footprint.

Empowering the Future of AI Power Infrastructure Through Advanced Testing

Whether it is the frontier exploration of 800V HVDC architectures, the extreme validation of hundreds-of-kilowatt power systems, or the challenge of low-voltage high-current Power Shelf testing, every electrical innovation in AIDC infrastructure relies on advanced test and measurement technologies.

Facing the challenges of ultra-high voltage, ultra-fast dynamic response, and high-density integration driven by the convergence of computing power and energy efficiency, NGI’s high-performance high-power electronic loads, with core advantages in high power density, high-speed response, and high-voltage capability, have successfully enabled multiple TOP-tier enterprises to overcome the critical validation gap from R&D to commercial deployment.

Moving forward, NGI will continue to deepen its expertise in power electronics testing and provide more precise and reliable test solutions, helping customers gain a competitive advantage in the next generation of AI power technology development.