What are these electric components?

Question

This is a snapshot from a single-line diagram of emergency switchboard drawn in 1984 for an oil & gas project.

What are these two components next to the motor symbol? What could CP stand for? What is the rectangle with a black dot?

The * note states

* -CONTROLS WIRED IN MULTICORE TO MARSHALLING COMPARTMENT.

Most diagrams come with a legend - which might answer most of your questions. — Solar Mike, Sep 09 '21 at 07:15
If there is such a legend diagram, it is sadly not accessible at the moment. — Corentin Pane, Sep 09 '21 at 07:24
The look of the box + dot kinda suggests an emergency stop button for an NVR switch. (Then, Could CP be a control panel, somewhere else, needing a remote stop for safety?) — , Sep 09 '21 at 14:15

score 1 · Answer 1 · answered Sep 09 '21 at 11:27

1

You need a legend from the drawing from the project plan package. The location of the box near the motor suggests that the symbol in question is a transducer that is monitoring the motor. It could be a thermocouple. The symbol could also designate a group of transducers such as motor winding temperature, shaft rotation, air flow. The designation CP likely means control panel.

answered Sep 09 '21 at 11:27

If HVAC is of any importance it might be a room temperature sensor for the ventilation to work on. – Jeroen3 Sep 09 '21 at 13:37

What are these electric components?

1 Answers1

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