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What is the difference between a TVSS type EMA and EBA device ?

The EMA series TVSS devices have one module per phase where the EBA TVSS devices have one module (brick) that connects to all phases.  The EBA series TVSS also has a top surge current rating of 240kAper phase.  The EMA series TVSS devices include the larger surge current ratings of 320kA per phase and 480kA per phase.

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