Jean Müller's ceramic fuse, specially designed for photovoltaic (gPV) systems, is a high-performance protection element essential for the safety of direct current (DC) circuits.
Here is the technical description of the 20A / 1000V DC model:
Main Technical Specifications
- Protection type: gPV (specific standard for photovoltaic panels, capable of interrupting small fault currents, typical of solar systems).
- Nominal current: 20 Amps.
- Nominal voltage: 1000V DC.
- Dimensions: Standard 10×38 mm (cylindrical), compatible with most fuse separators on the market.
- Breaking capacity: Usually 30kA or 50kA (the ability to extinguish the electric arc in the event of a major short circuit).
Construction Features
- Outer material: High-density ceramic body, resistant to extreme temperatures and high internal pressures.
- Contacts: Silver plated copper terminal caps for maximum conductivity and minimum oxidation over time.
- Fusible Element: Pure silver inner wire, precisely calibrated to melt quickly when current exceeds 20A.
Role and Benefits
- String Protection: Protects the photovoltaic modules against reverse currents that can occur in systems with several strings (strings) connected in parallel.
- Fire Safety: Prevents cables and panels from overheating in the event of a system fault.
- Jean Müller Reliability: The brand is recognized for German quality standards, offering a very precise tripping curve, crucial for sensitive equipment (such as inverters).
Installation recommendation: This fuse must be installed in a separator (socket) suitable for 1000V DC. It is recommended to periodically check the contacts to avoid excessive heating due to poor tightening.
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