Dear Mr. Robert.Wall and Mr. Bill.Thomson,
Thank you very much for your feedback. Below is the link for the SCT-013 datasheet:
100A Split core current transformer SCT-013
I cropped the datasheet in the link above so that we can only focus on the schematic diagram only, which is shown in the photo below. For full datasheet, please refer to the link above.
As we can see from the schematic diagram above, there are 2 types of SCT-013, which is:
- Current output type
- Voltage output type
Both current output type and voltage output type do have TVS in the schematic diagram. However, based on the schematic diagram:
- The TVS for the current output type in the diagram is a diode
- The TVS for the voltage output type in the diagram is a resistor (I believe that is the symbol of a resistor)
Maybe I am wrong (or maybe the schematic should not use the resistor symbol for TVS for voltage output type), but this is the reason why I came out with the term TVS resistor. If the term TVS resistor really does not exist, then I think 1 of the following things should be done:
- The resistor symbol for the voltage output type SCT 013 in the schematic diagram in the datasheet should be replaced with a proper TVS symbol.
- If the TVS terminology used to label the resistor in voltage output type SCT 013 is really a resistor and not a TVS, then the term ‘TVS’ for the voltage output type in the schematic diagram should be revised to other proper term. For an example, the more accurate term for the resistor in the schematic diagram should be ‘Internal Burden Resistor’ or ‘Built-in Burden Resistor’ or ‘On-board Burden Resistor’ etc.
I’m sorry if the term TVS resistor that I use is not correct, but I came out with that term based on the resistor symbol that I see in the schematic diagram for Voltage output type labelled with ‘TVS’ in the datasheet.
Thank you and have a nice day.