# 25ka Surge Arrester 25GR 4P Type 1 Specifications and Features
Introduction
The 25ka Surge Arrester 25GR 4P Type 1 is a high-performance surge protection device designed to safeguard electrical systems from transient overvoltages caused by lightning strikes or switching surges. This robust arrester is engineered to meet the demanding requirements of industrial and commercial applications.
Key Specifications
- Nominal Discharge Current (In): 25kA
- Maximum Discharge Current (Imax): 50kA
- Voltage Protection Level (Up): ≤2.5kV
- Rated Voltage (Uc): 320V AC
- Response Time: ≤25ns
- Number of Poles: 4P (4-pole)
- Type: Type 1 (Class I)
Main Features
Superior Protection
The 25GR 4P Type 1 arrester provides excellent protection against direct lightning strikes with its high 25kA nominal discharge current rating. The device effectively limits transient overvoltages to safe levels, preventing damage to sensitive equipment.
Robust Construction
Built with high-quality materials, this surge arrester features:
- Durable metal oxide varistor (MOV) technology
- Thermal disconnector for safe operation
- Visual status indication for easy monitoring
- Compact design for space-saving installation
Compliance and Safety
The 25ka 25GR 4P Type 1 arrester complies with:
- IEC 61643-11 standards
- UL 1449 4th Edition
- CE marking requirements
Applications
This surge arrester is ideal for:
- Main distribution panels
- Industrial power systems
- Commercial buildings
- Telecommunication facilities
- Critical infrastructure protection
Installation Considerations
For optimal performance:
- Install at the service entrance of the electrical system
- Ensure proper grounding connections
- Follow local electrical codes and regulations
- Consider using with Type 2 and Type 3 arresters for complete protection
Conclusion
The 25ka Surge Arrester 25GR 4P Type 1 offers reliable protection against high-energy surges with its robust design and superior performance characteristics. Its compliance with international standards and versatile application range make it an excellent choice for comprehensive surge protection solutions.
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