240 VAC Current Sensor options

Hi All,

Just after a bit of advice, Im currently working on an automation project and have been looking for current sensors that can if possible clamp found power leads or a non invasive sensor that doesnt involve cutting wires like the ACS712 type.

Does anyone have any suggestions on the best place to look. ill be using 240 VAC and upto about max 15 amp.

Thanks

Search for "SCT013-015" on ebay. Leo..

Wawa: Search for "SCT013-015" on ebay. Leo..

Thanks Leo. Do these still have ground vcc and output channels?

A current transformer is passive. No supply.
Just the two connections of the secondary coil of the transformer
(the primary winding (one) is the mains power wire going through the hole).

CT with a voltage rating (1volt) already have a build-in burden resistor.
Note that 1volt AC is about 2.83volt peak/peak.

One connection of the CT must be connected to a 1:1 voltage divider (2*10k).
The other connection to an analogue input.
Leo…

You can buy current transducers , that clip on and provide a 4-20mA output , easiest option.

https://www.amelec-uk.com/products/DC-Current-Transducer-%252d-ASC330-.html

hammy: You can buy current transducers , that clip on and provide a 4-20mA output , easiest option.

https://www.amelec-uk.com/products/DC-Current-Transducer-%252d-ASC330-.html

That one has a bandwidth of 20Hz, not useful for AC mains.

If getting a current transformer be sure to get one with integral burden resistor, far safer. And make sure it has the correct range.

Oops ... picked the wrong one ! Amelec do a range of current transducers - for AC or DC loads that give a dc 4-20mA signal output the CT opens so you can “ clip on “

https://www.amelec-uk.com/product_downloads/datasheets/ASC451LP.pdf

Look into a 1-Channel 4-20mA Current Loop Receiver 16-Bit ADS1115 I2C Mini Module for the Arduino. "This 1 channel 4-20mA current loop receiver comes with on board power boost circuit and this 16V power supply can be used to power up the sensor. This 4-20mA current loop receiver board has a 2 pin connector which makes sensor connection real easy. This 4-20mA current loop receiver can be used with arduino, raspberry pi, particle photon, electron, usb, RS485, RS232 and any micro controller which has a i2c port. Readings data from this 4-20mA current loop receiver is simple, it communicates with the master controller over i2c and to read the 4-20mA output all you will need to do is send i2c commands and read the sensor values. This board has ADS1115." The above from there web site. This response is to help you get started in solving your problem, not solve it for you. Good Luck & Have Fun! Gil