Continuous thermal monitoring for electrical systems up to 600V
In electrical systems, many failures do not occur suddenly. They develop over time: a degrading connection, improper tightening, unbalanced loads, or a component operating outside optimal conditions.
The Hot Spot Monitor HSM 600 by GRACE is a continuous thermal monitoring system designed for low-voltage electrical equipment up to 600V. Its main objective is to promptly detect abnormal temperature increases at critical points in the system, reducing the risk of failures, downtime, and hazardous conditions.
From periodic inspections to continuous monitoring
The HSM 600 introduces a Continuous Thermal Monitoring approach that goes beyond traditional periodic checks performed with external tools.
The system uses thermistor-based sensors, installed directly on the most critical components of the system, such as:
- electrical connections;
- circuit breakers;
- busbars;
- potential failure points, identified as PFP – Potential Failure Points.
Sensors continuously measure temperature and are designed for permanent operation, enabling real-time monitoring of the thermal conditions of the components.
Immediate alerts to act before failure occurs
When temperature exceeds predefined thresholds, the HSM 600 activates an immediate alert system through:
- indicator light;
- alarm system;
- real-time notification of abnormal conditions.
This allows operators to take action before overheating evolves into more serious events such as sparks, fires, or arc flash incidents. In short: lower risk, higher operational continuity. And fewer “surprises” inside the panel—which is never good news.
Advanced diagnostics with ΔT Trending
One of the most valuable features of the HSM 600 is ΔT Trending, or differential temperature analysis.
The system compares the temperature measured at critical points with ambient temperature, enabling:
- early detection of anomalies;
- identification of subtle thermal drifts;
- support for predictive maintenance activities;
- compliance support with NFPA 70B standards.
Phase-to-phase differential monitoring
The HSM 600 also detects temperature differences between electrical phases.
This function helps identify conditions such as:
- unbalanced loads;
- faulty connections;
- thermal imbalances;
- components under abnormal stress.
Thermal data thus becomes an operational tool to understand the real condition of the system—not just to record temperature values.
Simple configuration via browser
The HSM 600 is designed for quick and accessible setup.
The system can be configured via web browser, with no need for dedicated apps or proprietary software. This simplifies commissioning, reduces operational complexity, and allows immediate access to monitoring data.
A tangible advantage, especially in industrial environments where time, simplicity, and reliability are not details—they are KPIs.
Scalability for complex systems
The HSM 600 supports daisy chain configurations.
This allows:
- multiple units to be connected together;
- extended coverage across complex systems;
- monitoring of multiple panels or system sections;
- flexible and scalable system design.
Key benefits
- Continuous, real-time monitoring;
- permanent installation on critical components;
- reduced risk of fires and electrical failures;
- immediate alarm system;
- support for NFPA 70B compliance;
- simple browser-based configuration;
- scalability for systems of any size.
Typical applications
The Hot Spot Monitor HSM 600 is ideal for applications where operational continuity and electrical safety are critical, including:
- electrical distribution panels;
- MCC – Motor Control Centers;
- industrial systems with critical loads;
- electrical infrastructures subject to periodic inspections;
- production environments where downtime has significant economic impact.
Controlling temperature means controlling risk
The HSM 600 transforms thermal monitoring from an occasional task into a permanent system safeguard. A practical solution to increase visibility on critical points, improve predictive maintenance, and reduce the risk of hazardous electrical events.
Contact our experts
The Technology BSA team supports application analysis, system architecture definition, and the integration of the Hot Spot Monitor HSM 600 into both existing and new installations.
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