Below you will find a list of abbreviations we might have used on this site and in any correspondence and/or reports.

CDEGS: Current Distribution, Electromagnetic Fields, Grounding and Soil Structure Analysis

COTS: Commercially off the shelf

DNO: Distribution and Network Operator (Electricity supply)

EMC: Electromagnetic Compatibility

EMI: Electromagnetic Interference

EMP: Electromagnetic Pulse

EPR: Earth Potential Rise*

GPR: Ground Potential Rise*

kV: Kilo-Volts (1,000V)

LEMP: Lightning ElectroMagnetic Protection

LP: Lightning Protection

LPL: Lightning Protection Level

LPS: Lightning Protection System

OHL: Overhead Transmission Line

PDC: Power Distribution Cabin

PSPI: Portable Surge Protection Interface

PS: Power Station

PPE: Personal Protective Equipment (safety related)

RoEP: Rise of Earth Potential*

SPD: Surge Protection Device

Sub: Substation

Surge: Transient Over Voltage

TX: Transformer

* All refer to the same

"Working with GreyMatters has totally changed my expectations of a professional engineering consultancy firm … for the better! Technically, they were on the money! More importantly however ... they kept me updated throughout the entire project, which was so refreshing, and therefore quickly put my mind at ease that things were being taken care of." (C. Turgis)
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