Surge Protective Device
FAQ & Help (2/2)
8. What is the role of GDT connected in series between 5-8 lines?
4-5 and 7-8 PoE lines, on the basis of common mode (line-ground) surge protection, add additional differential mode (line-
line) surge protection, providing more refined protection.
9. How do I determine the quantity of surge protector that I need for protecting the equipment?
Surge on the STP cable will be transmitted in two directions to the ends of the cable. The surge protector A protects the
equipment on the A side, such as an ethernet switch, etc. And Surge protector B protects the equipment on the B side.
such as an ethernet equipment. If only the device on one end of cable needs to be protected, then only one surge
protector is needed.
10. What is UL f1 standard for housing materials?
UL f1 standard requires housing materials be UV and acid rain resistant and can be used in outdoor environments
11. What is the material of the cable seal of the cable glands?
The material of the cable seal is NBR?
12. What's the outer diameter of a cable which can pass through the cable glands?
3 to 6.5mm
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