Lightning and surge protection - basic principles
Lightning and surgeprotection - basic principles October 2016AN904-1002 Rev IApplication noteMTL surge protectionCONTENTS ........................................ ........................................ ........................................ ........................................ ...........Page1 INTRODUCTION ........................................ ........................................ ........................................ ........................................ ........................................ ........................................ ...........1 The need for surge protection .
The field transmitter is pole-mounted away from the control building but con-nected to the telemetry electronics by signal cabling. Most transmitters incorporate some level of isolation from structural earth, typically 500V. This level of isolation now has to withstand the transient voltage between the new
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