Shealth Voltage Limiters and Zener Diodes

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Yes, it is possible to use a zener diode as part of a power distribution sheath voltage limiter. But one must then have the zener steer the excess energy into something that can handle the excessive energy for as anyone familiar with a zener should realize, zener diodes do not dissipate a lot of power themselves and survive. I suspect though that the additional circuitry required to permit a zener to be part of a sheath voltage limiter will make this approach impractical.

The sheaths of power distribution cabling is not something that people should nickle and dime part expenses on. These parts protect both people and the power distribution of the grid itself. Leave the decision of where, how many and what type of SVL components are required to the qualified, licensed personnel. A novice should not second guess the design of large power distributions.

But well thought out questions here, will always be answered. Some of the answers may even be correct.

The short answer is likely no as Zener diodes do not have the current or power handling capacity of the metal oxide varistors used in the sheath voltage limiter (surge arresters). Series and parallel strings of zener diodes won't work either.

Do not skimp on the protection by trying to build something that is not suitable for purpose and that has not been tested and approved for use on the power network (distribution grid). Check your local electrical standards and regulations for more information, or perhaps consult the sheath voltage limiter supplier(s) for more guidance as to why this is a bad idea.