Current Sense / P1
CT current meter with a P1 Interface
The Xemex CSP1 (Current Sense / P1) module is a CT current meter with a DSMR4 P1 Interface, which measures the current consumption of the household.
Real time total current consumption is available to the charge point via P1 DSMR4 formatted messages. With this information the charge point can calculate the current capacity which is available for charging a car.
Up to 3 CT transformers can be connected to the CSP1 device. These CT transformers can be installed around the power lines without disturbing the installation. The CSP1 can be used for both, single phase or poly phase installations.
Use case: EV charging station
In order to charge an electrical vehicle as quickly as possible, a residential charging station needs to know how much power of the total available grid connection is in use by the household appliances and how much is available for charging. The CSP1 can be used to measure the currently used power: