25ka Surge Arrester 25GR 4P Type 1 Specifications and Features

March 23, 2025 Off By

# 25ka Surge Arrester 25GR 4P Type 1 Specifications and Features

## Introduction to 25ka Surge Arrester 25GR 4P Type 1

The 25ka Surge Arrester 25GR 4P Type 1 is a high-performance protective device designed to safeguard electrical systems from transient overvoltages. This surge arrester is particularly effective against direct lightning strikes and other high-energy surges, making it an essential component in modern electrical installations.

## Key Specifications

The 25GR 4P Type 1 surge arrester boasts impressive technical specifications that ensure reliable protection:

  • Nominal Discharge Current (In): 25kA

  • Maximum Discharge Current (Imax): 100kA

  • Voltage Protection Level (Up): ≤ 2.5kV

  • Rated Voltage (Uc): 320V AC

  • Response Time: < 25ns

  • Number of Poles: 4 (3 phases + neutral)

  • Operating Temperature Range: -40°C to +85°C

## Main Features

Superior Protection

This Type 1 surge arrester provides primary protection against lightning-induced surges, with a high discharge capacity of 25kA (100kA max). It’s designed to handle the most severe surge conditions while maintaining system integrity.

Robust Construction

The 25GR 4P model features a durable, flame-retardant housing that meets stringent safety standards. Its compact design allows for easy installation in various electrical panels.

Visual Status Indication

Equipped with a clear status window, the arrester provides immediate visual confirmation of its operational state, allowing for quick maintenance checks.

Thermal Disconnector

An integrated thermal disconnector automatically isolates the surge arrester from the circuit in case of overload, preventing potential fire hazards.

## Applications

The 25ka Surge Arrester 25GR 4P Type 1 is ideal for:

  • Main distribution boards in commercial buildings

  • Industrial power distribution systems

  • Telecommunication facilities

  • Data centers and server rooms

  • Any application requiring Type 1 lightning protection

## Installation Considerations

For optimal performance, the surge arrester should be installed:

  • At the service entrance of the electrical installation

  • With proper grounding connections (≤ 0.5Ω recommended)

  • In accordance with local electrical codes and standards

  • By qualified electrical professionals

## Compliance and Certifications

The 25GR 4P Type 1 surge arrester complies with:

  • IEC 61643-11 standards for Type 1 SPDs

  • UL 1449 4th Edition

  • CE marking for European markets

  • RoHS compliance for environmental safety

## Maintenance and Service Life

While the surge arrester requires minimal maintenance, regular inspections are recommended to ensure continued protection. The device typically has a service life of

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