Grounding current transformer - Measured values too low by approx. 50%.
EFR4000IP; EFR4001IP

If the connected current transformers are grounded at higher measuring voltages, the device measures only about half the power. This is due to the design of the measuring inputs.
As a remedy, intermediate transformers with suitable accuracy and power are connected before the measuring inputs of the EFR4001IP, 5/5 A or 5/1 A (e.g. MBS WSK 30, part numbers 30013 or 30211).

 Device switches on and off cyclically after restarting
EFR4001IP

EFR4001IP with firmware version 12720-1410-03 may experience the following problem:
- If program 9 or 10 is selected and
- the device is disconnected from the supply voltage for longer than 7 days,
- then a reset loop (device briefly switches on and then off again) may occur after the supply voltage is reconnected.

Remedy:
- Press the joystick button of the EFR4001IP upwards for >2sec,
- This takes you to the reset menu, which is displayed for 2min.
- During this time the device can be reached via the website.
- On the web page, a program <9 must be selected under Configuration.
- After that, the device is accessible again and starts as usual.

A firmware update (version 12720-1410-04) is available for download.