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

In today’s increasingly electrified world, protecting electrical systems from transient overvoltages is more critical than ever. The 25kA Surge Arrester 25GR 4P Type 1 stands as a robust solution designed to safeguard electrical installations against lightning strikes and power surges. This high-performance device offers superior protection for residential, commercial, and industrial applications, ensuring the longevity and reliability of electrical equipment.

Understanding Surge Protection and Type 1 Arresters

Surge protection devices (SPDs) are essential components in modern electrical systems, designed to limit transient overvoltages and divert surge currents to ground. Type 1 surge arresters, like the 25GR 4P model, are specifically engineered to protect against direct lightning strikes and are typically installed at the service entrance of buildings.

The 25kA rating indicates this arrester’s impressive capacity to handle surge currents up to 25,000 amperes per phase, making it suitable for areas with high lightning activity or critical infrastructure protection.

Key Features of the 25GR 4P Type 1 Surge Arrester

1. High Surge Current Capacity

With a nominal discharge current (In) of 25kA, this arrester can withstand the most severe electrical surges, providing reliable protection even in lightning-prone regions.

2. Four-Pole Protection

The 4P designation indicates comprehensive protection across all conductors: three phase lines and the neutral conductor. This ensures complete system protection against both common-mode and differential-mode surges.

3. Robust Construction

Built with high-quality materials, the 25GR 4P features durable housing that can withstand harsh environmental conditions while maintaining optimal performance.

4. Visual Status Indication

An integrated status window provides clear visual confirmation of the device’s operational state, allowing for quick inspection and maintenance.

Technical Specifications

Type: Type 1 (Class I)

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

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

Voltage Protection Level (Up): ≤ 2.5kV

Nominal System Voltage: 230/400V AC

Response Time: < 100ns

Operating Temperature Range: -40°C to +80°C

Installation and Application

The 25kA Surge Arrester 25GR 4P Type 1 is designed for installation at the main distribution board or service entrance of electrical installations. Its typical applications include:

Residential buildings in lightning-prone areas

Commercial and industrial facilities

Telecommunication centers

Data centers and server rooms

Medical facilities with sensitive equipment

Proper installation should be performed by qualified electricians in accordance with local electrical codes and manufacturer guidelines

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