Electrical fire protection begins with prevention
The risk areas for electrical fires in commercial buildings
As the ultimate interface between the MV network and end users, medium voltage switchgear and MV/LV transformer are a crucial part of the Power Distribution chain to protect the power availability of the final installation.
Our well known MV systems now integrate the latest digital technologies with state-of-the-art protection and automation that bring IoT connectivity to your MV installation.
These evolutions, based on condition monitoring, work seamlessly with digital services to provide real-time information on operational efficiency and health status, that allows users to prevent unexpected downtime and the risk of fire.
Fire-risk characteristics that can be found in low-voltage (LV) main and secondary switchboards include: high intensity in normal operation, high short-circuit current, high density, bare busbar in compartments which create a T° rise concern, power connection issues and the possibility of internal arc faults.
The control panel of a machine with a high number of connections, switches, auxiliary supplies, transformers and — in particular — variable speed drives, also needs to be carefully designed and manufactured to mitigate the risk of electrical fires.
Schneider Electric’s solutions include:
An insulation failure between a line conductor and earth in – for example, dusty and humid environments – can lead to a low-intensity arc fault that the line conductor withstands, but remains high enough to start a fire. Some tests have shown that a fault current as low as 300 mA can induce a real risk of fire.
A polluted and damp insulation surface can enable small electrical discharges, causing carbon deposits that increase conductivity. If the current leak exceeds 300 mA, the carbon deposits and insulation can quickly ignite and cause a fire hazard.
To ensure your power and distribution circuits are protected against fire: Residual current devices (RCDs) can be effective in protecting against these hazards as they sense leakage currents below 300 mA.
Schneider Electric offers a number of solutions including:
Final distribution and final circuits present the same risks as described in power and distribution circuits, but in addition, due to the quantity of connections, the low cross-section area and the type of cable installation method (less mechanical protection), the risk of damaged cables is higher than in power and distribution circuits.
According to the international IEC60364 standards series and local related standards, the use of RCDs with sensitivity below 300 mA to protect against earth leakage current is recognized as effective protection against the risk of fire caused by insulation failure.
Schneider Electric produces three categories of RCDs – earth leakage add-on RCDs, RCCBs and RCBOs – that can be used in secondary and final switchboard installations:
Help prevent an electrical fire in your installation
Explore fire prevention solutions and help enhance safety
Featured products and software
Featured products and software
TeSys GV4 Motor Circuit Breakers
TeSys T Motor Management System
EcoStruxure: Continuous Thermal Monitoring
Explore our latest insights on connected power systems
Electrical fire prevention begins with innovative technology
Thermal sensors help detect faults in power system electrical connections
How to use the Easergy Thermal Connect app
Share your own story
Find answers now. Search for a solution on your own, or connect with one of our experts.
Reach out to our customer care team to receive more information, technical support, assistance with complaints and more.
Search topic-related frequently asked questions to find answers you need.
When assessing all the risks that face a building or installation, electrical fire should be top of the agenda. However, despite its frequency and many potential causes, preventing it is straightforward with the right approach. By embedding connected solutions across their circuit, a consultant engineer protects against the often-unappreciated dangers of faulty installation and ageing components. In this way, smart electrical fire prevention delivers both reliable protection and peace of mind.