Marvin Posted June 20, 2021 Share Posted June 20, 2021 Hi What cable type is best to extend the reach of my CT clamp? Marvin. Link to comment Share on other sites More sharing options...
ProDave Posted June 20, 2021 Share Posted June 20, 2021 Probably a single twisted pair cable. Link to comment Share on other sites More sharing options...
SteamyTea Posted June 20, 2021 Share Posted June 20, 2021 4 minutes ago, ProDave said: Probably a single twisted pair cable. Initially I thought that, but as it is measuring ripples won't they get cancelled. Why do you need to extend it? The extra resistance may change the readings. Link to comment Share on other sites More sharing options...
ProDave Posted June 20, 2021 Share Posted June 20, 2021 A CT is a current transformer. Depending how it is configured (load local to transformer or load in the measuring device) the cable will be conveying a 50Hz voltage or current. All you want is that signal to arrive at it's load with no loss, and not picking up any externally induced signal, hence the twisted pair. Link to comment Share on other sites More sharing options...
Marvin Posted June 20, 2021 Author Share Posted June 20, 2021 1 hour ago, SteamyTea said: Why do you need to extend it? The extra resistance may change the readings. The inverter is 15m of cable from the grid supply. Link to comment Share on other sites More sharing options...
Marvin Posted June 20, 2021 Author Share Posted June 20, 2021 1 hour ago, ProDave said: A CT is a current transformer. Depending how it is configured (load local to transformer or load in the measuring device) the cable will be conveying a 50Hz voltage or current. All you want is that signal to arrive at it's load with no loss, and not picking up any externally induced signal, hence the twisted pair. I was thinking of using Cat5 cable... Link to comment Share on other sites More sharing options...
Marvin Posted June 20, 2021 Author Share Posted June 20, 2021 Or Is STP cable better as it will need to run near mains..? Link to comment Share on other sites More sharing options...
Onoff Posted June 21, 2021 Share Posted June 21, 2021 This might help? https://www.se.com/uk/en/faqs/FA221505/ 1 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now