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What is you surge suppression experience

colporteur

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Key Features • Supports 10/100/1000/10GBASE-T Ethernet speeds • Full PoE, PoE+, and PoE++ (IEEE 802.3af/at/bt) compatibility • Supports up to 90W of power delivery • IP65-rated waterproof outdoor enclosure • Designed to protect against lightning strikes and electrical surges • Ultra-low capacitance for high-speed data performance • Fast response time for critical equipment protection • Simple inline RJ45 installation • Flexible mounting options for poles, enclosures, and walls • Tested to international surge protection standards Ideal Applications • Outdoor wireless radios and backhaul links • Fixed wireless and WISP deployments • Outdoor WiFi access points • IP surveillance and security cameras • Network switches and outdoor enclosures • Industrial networking and SCADA systems • Municipal, campus, and enterprise network infrastructure

I am on my third install of CAT6 cables to Access points on the top of grain bins. This advertisement for Data Surge Protection Outdoor SPD IP65 10GB Ethernet came across my desk.

Many a fault over 20 years working in telecommunications were repaired on two wire copper pairs by replacing the fuse or surge suppressor. I never gave a thought to network cable. Then I was never running them up the side of grain bins. Now I'm thinking about them after the ad appeared to remind me.

Looking to find anyone that has experience and can provide some insight.

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  • Hi Sean,

    I was googling and found this product which looks interesting: Citel MJ8-POE-C6A

    The datasheet has this diagram:

    image

    I've never seen three-terminal GDT's before, but the Cyclone product you found uses three-terminal ones too. However, the MJ8-POE-C6A also includes a lot more.

    This is the Cyclone circuit from their datasheet:

    image

    The Citel one has a shielded metal enclosure, plus also has silicon devices (for faster action; the GDTs will be slower) for differential-mode within each pair, but also between two pairs. Not sure why the two central pairs in that diagram don't have the same arrangement, anyone know?

    Also, I was wondering, it might be a good idea to buy ferrites too, and clip them at each end, to suppress common-mode spikes, so the diodes and GDTs have to do less work. They would have to be quite large ferrites.

    I bought these a while back:

    image

    I wasn't planning to use them for network connections, but because I wanted to fit an antenna outdoors and was worried about induced voltages during thunderstorms. 

  • in reply to shabaz

    The different pairs is because of the standard, the network pairs are 1-2, 3-6, 4-5, 7-8 with only the first two used in 10/100 configuration.

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