# Siemens Energy 3EK Neutral Grounding Surge Arrester

> surge-arrester - Station-class silicone surge arrester designed for power transformer and shunt reactor neutral grounding, limiting transient voltages across neutral insulation and grounding impedance.

**Voltformer canonical:** https://voltformer.com/product/siemens-energy-3ek-neutral-grounding-surge-arrester - markdown version: https://voltformer.com/product/siemens-energy-3ek-neutral-grounding-surge-arrester.md

## Overview

- **Brand:** Siemens Energy
- **Product family:** 3EK medium/high-voltage surge arresters
- **Category:** Grid Equipment & Power Quality / surge-arresters-and-insulation-coordination

## Manufacturer-stated technical envelope

- **System voltage:** 6–145 kV
- **Rated voltage:** 6–120 kV
- **Nominal discharge current:** 10 / 20 kA peak
- **Line discharge class:** 2 / 3
- **Mechanical strength (SSL):** 1000 / 2500 Nm
- **Housing:** Silicone housing with Cage Design for neutral grounding and station insulation coordination

## Standards

- IEC 60099-4
- IEC 60071-2
- IEEE C62.11

## Official sources

- https://assets.siemens-energy.com/dam/9f2143a4-3294-43da-a0fa-b03b00ddc5da/High-voltage-surge-arresters-brochure-pdf_Original%20file.pdf

- **Source scope:** manufacturer-family
- **Last reviewed:** 2026-09-13

Siemens Energy 3EK neutral surge arrester family for power transformer and station earthing protection. Confirm neutral insulation level and temporary overvoltage with the project grounding study.

The stated values are family or catalogue-option limits. Select the exact order code and verify project-specific duties before procurement or release of an SLD design.