Acrel Launches AIM-T500 Insulation Monitoring Device for 800V AI Data Centers and High-Power-Density HVDC Systems

New insulation monitoring relay delivers real-time earth-fault detection for AC, DC, and hybrid IT power systems up to 800V DC

SHANGHAI, China — August 12, 2026 — As AI data centers push toward 800V high-voltage DC (HVDC) power distribution to meet soaring power density demands, electrical safety in ungrounded IT systems has emerged as a critical operational priority. Acrel, a leading manufacturer of electrical measurement and power management solutions, today introduced the AIM-T500 Insulation Monitoring Device, designed to provide continuous insulation resistance monitoring, early-warning alarms, and fault traceability for AI data centers, UPS systems, and industrial IT networks.

AIM-T500 Insulation Monitoring Device for AC/DC Hybrid IT Systems

The 800V Shift: Why Insulation Monitoring Matters More Than Ever

The AI computing boom is driving data center power architectures from traditional 48V/54V bus bars toward high-voltage DC distribution at 800V and beyond. Higher voltages reduce transmission losses and enable denser rack deployments, but they also introduce new challenges: in IT (isolated/ungrounded) systems, the first earth fault produces only a small fault current and often goes undetected. If insulation degradation is left unaddressed, a second fault can trigger catastrophic short circuits, unplanned outages, equipment damage, and even fire hazards.

“As voltage levels climb, the cost of an insulation failure climbs with them. The AIM-T500 makes insulation status visible, actionable, and manageable — exactly what high-availability data center operators need.”

— Spokesperson, Acrel

AI Data Center with 800V HVDC Power Distribution Infrastructure

AIM-T500: Key Features and Technical Specifications

The AIM-T500 insulation monitoring relay is engineered for versatility across AC, DC, and hybrid AC/DC IT systems:

When the measured insulation resistance falls below the user-configured threshold, the device immediately triggers a warning or alarm signal, enabling maintenance teams to locate and resolve degradation before it escalates into a forced outage.

Six Application Scenarios Where AIM-T500 Delivers Value

Key Application Scenarios: Data Center, UPS, Industry, Marine, Mining, Lab

• AI Data Centers & High-Density Racks — Continuous insulation monitoring for 800V HVDC bus systems, safeguarding GPU clusters and critical IT loads.
• UPS & Emergency Power Systems — Ensures backup power integrity by detecting insulation faults in battery strings and inverters before a transfer event.
• Industrial IT Ungrounded Systems — Widely deployed in manufacturing lines, pharmaceuticals, and food processing where power continuity is mandatory.
• Marine, Offshore Platforms & Shore Power — Operates reliably in harsh electromagnetic environments to protect vessel and port electrical networks.
• Mining, Metallurgy & Chemical Plants — Provides an essential safety barrier in dusty, humid, and high-vibration industrial environments.
• Computer Centers & Test Laboratories — Protects precision instruments and sensitive test equipment from insulation-related interruptions.

Four Direct Benefits of Deployment

Core Value: Real-Time Monitoring, Early Warning, Risk Reduction, O&M Efficiency

• Real-Time Insulation Visibility — Live insulation resistance readings with clear status visualization for both AC and DC bus systems.
• Predictive Fault Prevention — Trend-based early warning allows proactive maintenance, reducing unexpected shutdowns.
• Reduced Downtime & Safety Risk — Prevents insulation failure from cascading into trips, equipment damage, or personnel hazards.
• Improved O&M Efficiency & Reliability — Onboard event logging and remote RS485 monitoring streamline troubleshooting and compliance reporting.

Market Outlook

With global AI data center capex accelerating and 800V HVDC rapidly becoming the standard for next-generation facilities, insulation monitoring is transitioning from an optional accessory to a mandatory component of safe power distribution. The AIM-T500 positions Acrel at the forefront of this transition, offering a cost-effective, communication-ready solution that integrates seamlessly with existing building management and power SCADA systems.

About Acrel

Acrel (Jiangsu Ankerui Electric Co., Ltd.) is a specialized manufacturer of electrical measurement instruments, power monitoring systems, energy management platforms, and electrical safety devices. With over two decades of experience, Acrel serves data centers, industrial facilities, commercial buildings, renewable energy plants, and infrastructure projects worldwide. The company's product portfolio includes smart meters, protection relays, insulation monitoring devices, gateway devices, and cloud-based energy management software.

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