How to select SPD for field instruments?
热门标签:SPD How to select SPD for field instruments? 2020-08-26 How to select SPD for field instruments? 2481

SPD for field instruments are installed by thread. The following contents need to be confirmed.

1.    Number of wires to be protected

Select 2 wires, 3 wires, 4 wires accordingly.


2.     Is there a backup electrical interface?

Yes——select parallel mounted SPD 

No——select series mounted SPD


3.    Check the type of the thread

The type of the thread needs to be specified, such as 1/2’NPT,3/4’NPT,which are commonly used.


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