# 25kA Surge Arrester 25GR 4P Type 1 for Enhanced Electrical Protection

## Introduction to Surge Protection

In today’s increasingly electrified world, protecting electrical systems from transient voltage surges has become more critical than ever. The 25kA Surge Arrester 25GR 4P Type 1 represents a robust solution for safeguarding electrical installations against potentially damaging power surges.

## Understanding the 25kA Surge Arrester 25GR 4P Type 1

The 25GR 4P Type 1 surge arrester is designed to provide superior protection for electrical systems. With a nominal discharge current of 25kA, this device offers exceptional capacity to handle large surge currents that can occur during direct lightning strikes or other major electrical disturbances.

### Key Features:

– 25kA nominal discharge current rating
– Type 1 protection (for direct lightning strikes)
– 4-pole configuration for comprehensive protection
– Robust GR-series construction
– Suitable for main distribution panels

## Technical Specifications

The 25GR 4P Type 1 surge arrester boasts impressive technical characteristics that make it suitable for demanding electrical environments:

Nominal Voltage: 230/400V AC

Maximum Continuous Operating Voltage (Uc): 320V AC

Nominal Discharge Current (In): 25kA (8/20μs)

Maximum Discharge Current (Imax): 50kA (8/20μs)

Voltage Protection Level (Up): ≤1.5kV

Response Time: <25ns

## Installation and Application

The 25GR 4P Type 1 surge arrester is typically installed at the service entrance of electrical installations, providing the first line of defense against power surges. Its 4-pole configuration ensures comprehensive protection for all conductors, including the neutral line.

### Typical Applications:

– Commercial buildings
– Industrial facilities
– Data centers
– Telecommunication installations
– Healthcare facilities

## Benefits of Using the 25GR 4P Type 1

Choosing this surge protection device offers numerous advantages for electrical system protection:

Enhanced System Protection

The high 25kA capacity ensures reliable protection against severe electrical surges, minimizing the risk of equipment damage and downtime.

Compliance with Standards

This device meets international standards for Type 1 surge protection devices, including IEC 61643-11 and EN 61643-11.

Long Service Life

With robust construction and high-quality components, the 25GR 4P Type 1 offers extended service life with minimal maintenance requirements.

## Maintenance and Monitoring

While the 25GR 4P Type 1 is designed for reliability, regular inspection is recommended to ensure optimal performance:

• Visual inspection for physical damage
• Check status indicators (if equipped)
• Periodic testing according to manufacturer guidelines
• Replacement when end-of-life indicators activate

## Conclusion

The 25kA Surge Arrester 25GR 4P Type 1 represents a high-performance solution for protecting electrical systems against damaging power surges. Its robust design, high discharge capacity, and comprehensive protection make it an excellent choice for critical installations where reliable surge protection is essential. By implementing this device as part of a complete surge protection strategy, facility managers can significantly reduce the risk of equipment damage and costly downtime caused by electrical surges.