CA01065E_Catalog 70

ARRESTERS Selection

Protecting your vital assets begins with selecting the proper Hubbell distribution surge arrester. Three facets are generally considered to select a product appropriate for your application. Use these steps to select the appropriate arrester for your application. Step 1: Select the arrester classification Hubbell offers a full range of IEEE and IEC classified arresters to meet your system requirements. Start by selecting the appropriate arrester class.

IEEE Classes

IEC Classes

Normal Duty (ND)

Distribution Medium (DM)

Heavy Duty (HD)

Distribution High (DH)

Heavy Duty (HD) Riser

-

Intermediate

Station Low (SL)

Step 2: Select the arrester MCOV (Uc) Selection of an arrester is based upon the maximum continuous operating voltage (MCOV or Uc) that is applied across the arrester in service (line-to-ground). Common arrester MCOV values are provided in the following table. Additional guidance for different system grounding is provided in the Arrester Selection Guidelines section.

2.55

5.1

7.65

8.4

10.2

12.7

15.3

17

19.5

22

24.4

29

31.5

34

*Additional ratings may be available depending on the arrester class

Step 3: Select mounting hardware and accessories Mounting hardware and accessories are unique for each application. Select options are detailed on the Arrester Hardware pages. Additional options are available. Please contact your Hubbell representative for additional support with your application.

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