The Ziehl EFR4002IPR is a high-performance zero-export and feed-in control relay designed for managing photovoltaic systems where export limitation is required. It continuously monitors grid current using external current transformers and dynamically adjusts inverter output to prevent feed-in beyond the allowed threshold. With Ethernet connectivity, Modbus TCP support, and rapid reaction times, it integrates easily into modern PV installations. The EFR4002IPR provides reliable, precise control to ensure grid compliance and stable system operation. Specifically made for use with Rogowski Coils for added flexibility
Supply Voltage: AC/DC 24-270 V
Current Transformers: Scalable up to 2400A, secondary 1A or 5A
Input: 3 CT inputs (Rogowski Type), 4 Digital Inputs
Output: 3 Relay outputs, Analog outputs as measuring transducer and for stepless regulation of a consumer
Connectivity: Modbus TCP, Integrated webserver
DIN rail mounting
Integrated LCD Screen





