TVR Instruments Measuring Power Protection LVD Distribution & Panel Building




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  • Optimisation of the internal consumption of self-generated energy
  • Energy flow direction relay for battery storage systems
  • Limitation of the import power
  • 0/4 - 20 mA output with linear control function or as a scalable instrument transformer
  • SG ready optimised
  • Configuration also via web interface with transmission through USB memory stick

EFR3000 Datasheet ►


EFR3000 Manual ►


CTs for use with EFR3000 ►




The EFR3000 from Ziehl is an Intelligent Energy management and directional power relay designed to work where a local generating source, such as wind, solar, hydro or diesel generator is used alongside the grid. The EFR3000 will optimise the use of the most cost effective energy source, as well as preventing export or import when doing so would be costly or incur a fine from the utility company. The EFR3000 has three load management outputs which can be used to start loads to consume excess local produced power and further reduce energy costs.

The optimisation of locally produced energy can be complicated, not just because of the variability of solar or wind, but also the type of loads on the systems.  A system with dryers, heaters, or heavy but not constant loads such as washers, can make the energy management functions complicated.  The EFR3000 can be configured to monitor and manage the energy usage on these loads and will allow loads such as dryer and washer to complete their run cycles rather than simply shutting them off when the energy profile alters. The EFR3000 optimises the loads even in difficult and challenging states.

The EFR3000 has a directional current protection circuit, which will alarm when the power is either being exported or imported contrary to the connection agreement with the utility company. Being a true 3 phase current monitoring device the EFR3000 will respond if the current flow is incorrect on any of the three phases. There is an analogue output for the kW which can be fed into a BMS system or other monitoring devices as well as MODBus communication, all as standard.

The EFR3000 is configuration file is created via an online programming tool which is then saved locally and uploaded via the mini USB port. It can also be programmed locally via the front joystick and menu.



  TVR Instruments Limited, 143 Butt Road, Colchester CO3 3DP, Essex, United Kingdom - Tel: +44 (0)1206 575755 - Email
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