SIEMENS 3EK7 Silicon-Insulated Surge Arresters User's Manual
Summary
The 3EK7 surge arrester is a high-performance protective device engineered for superior safeguarding of electrical distribution systems up to 72.5 kV. It features robust silicone rubber housing and glass-collared MOV technology, offering unmatched resistance against power surges, environmental pollution, and extreme temperatures. This manual serves as a comprehensive technical guide for electrical engineers and system designers, detailing product specifications, compliance standards (IEC/IEEE), model selection criteria, and installation requirements to ensure reliable, maintenance-free operation in harsh environments.
Manual Details
| Brand | Siemens |
|---|---|
| Pages | 12 |
| File Size | 413.22 KB |
| Published | June 04, 2026 |
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Frequently Asked Questions
Which thread standard should I use?
There are options available for both IEC 60099-4 (metric) and IEEE Std C 62.11 (imperial, or B for metric with IEEE std).
How does the silicone housing prevent damage from pollution?
The SR housing is hydrophobic, designed to repel water and deposits, which virtually eliminates surface currents caused by environmental pollution.
What are the operating limitations of the 3EK7 arrester?
It supports operating voltages up to 72.5 kV and maintains functionality at altitudes up to 3600 m a.s.l., covering temperatures from –55° C to +50° C.