The demands on system availability in industrial plants, buildings, and power generation plants are growing. High-performance lightning and surge protection prevents cost-intensive failures and is already mandatory in many areas.
The proven surge protection devices of the VPU series are now also available in variants with integrated type I back-up fuse with 25 kA. This eliminates the need for an additional back-up fuse upstream of the SPD. The combined type I+II surge protection devices have one back-up fuse per protective path and can be used universally in power distribution systems. Application-specific product configurations enable universal use in different network forms.
• Max. continuous voltage UC: 275 VAC
• Discharge current Iimp: 25 kA (L-N)
• Discharge current Iimp: 100 kA (N-PE)
• Protection level UP: < 1500 V
• Very low follow current, not tripping a 16 A fuse
• Simultaneous monitoring of MOV and fuse component
• Leakage current-free phase GDT technology
The new surge protection devices with integrated back-up fuse offer optimum protection for power feeds due to 25 kA rated leakage current and fuse monitoring.
The dimensioning is independent of the main fuse rating, so that no additional back-up fuse is required even above 315 A. This minimises the wiring effort for all power distributions.
The modules have a width of only 35.6 mm per protective path and can be used in small spaces. In addition, they are pluggable and particularly easy to maintain.
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