0212 640 90 96

ZnO Surge Arresters

Property Specification

Type: Zinc Oxide (ZnO) Over-Voltage Surge Arrester

Features: Engineered with high-grade ZnO varistor elements, this advanced over-voltage protective device delivers critical surge suppression across distribution and transmission networks. Standard operating conditions produce minimal leakage currents in the microampere range, ensuring maximum thermal stability and energy efficiency. Upon detecting high-voltage transients from lightning strikes or switching operations, its non-linear voltage-current response transitions the device to a highly conductive state, safely channeling thousands of amperes to ground to clamp residual voltage. Superior to legacy silicon carbide (SiC) units, it features higher energy absorption.

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Description

Technical Parameters

Nominal System Voltage (kV) Continuous Operating Limit (MCOV / kV) Steep-Front Impulse Residual Voltage (kV) Switching Surge Residual Voltage (kV) Lightning Impulse Residual Voltage (kV) 2000 µs Rectangular Surge Capability (A) 4/10 µs High-Current Withstand (kA)
3 2.55 9.5 7.7 9 100 65
6 5.1 19.0 15.4 18 100 65
9 7.65 28.5 23.1 27 100 65
12 10.2 38.0 30.8 36 100 65
15 12.7 47.5 38.5 45 100 65
18 15.3 57.0 46.2 54 100 65
21 17.0 66.5 53.9 63 100 65
24 19.2 76.5 61.6 72 100 65
27 21.9 85.5 69.3 81 100 65
30 24.4 95.0 76.5 90 100 65
33 26.8 104.5 84.7 99 100 65
36 29 114.0 91.4 108 100 65
42 34.1 132.3 100.1 126 100 65

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