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I'm trying to identify this symbol coming from a 1985 electrical single line diagram (from a marine engineering project).

It looks like a closed disconnector switch or a styled fuse maybe?

enter image description here

Here is some context around the symbol:

enter image description here

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  • \$\begingroup\$ It is a Дюкер ! \$\endgroup\$ Sep 8, 2021 at 11:17
  • \$\begingroup\$ What would it be in english? Gas pipe? \$\endgroup\$ Sep 8, 2021 at 11:27
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    \$\begingroup\$ who knows "Syphon" anti-galvanic connection to prevent corrosion on pipe line to siphon electron collision to earth rather than corrode pipe. " cathodic protection type " \$\endgroup\$ Sep 8, 2021 at 11:34
  • \$\begingroup\$ It looks like a sliding earth-link to me. I can't find a reference. \$\endgroup\$
    – Transistor
    Sep 8, 2021 at 11:39
  • \$\begingroup\$ Looks like a fusible link. \$\endgroup\$ Sep 8, 2021 at 12:04

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It's a cartridge circuit breaker as per this website entitled Electrical and Electronic symbols: -

enter image description here

The bigger question will inevitably be - did the person making the diagram back in 1985 adhere to the standards or, were the standards of today the same as they were in 1985.

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