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ZIEHL industrie-elektronik, 74523 Schwäbisch Hall, Germany, +49 791 504-0, info@ziehl.de, www.ziehl.de
economical to consume the excess energy self. This
is especially reasonable when the dierence is high
between the price you pay to the grid provider and the
price the provider pays for fed in energy.
Functions:
Shift own consumption into times with high gene-
ration of energy
Switch on consumers when you have overow of
energy
Increase the share of consumed own energy
intelligent control of consumers
Cheap equipment costs ensure a short payback period:
Save € 312 * a year with the EFR4000IP by switching on at 200 days a year for an
average 3 hours consumers with 4 kW in times you have a surplus of own energy.
Equipment costs (EFR4000IP, 3x current transformer, if necessary contactors) are returned
within about 2 years*.
Longer / shorter switch on times and larger / smaller consumption shorten / extend
the period. In addition, in the long term rising purchase prices for energy can be expected.
* Feed 12 Ct / kWh, electricity purchase price 25 Ct / kWh
Relay for Energy Flow EFR4000IP
Optimization of consumption of own energy
Integrated Webserver, IP-Connection, Zero Export Device, measuring
transducer for power
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Relays for energy ow EFR4000IP
monitor the current ow between
public power grid and generating
plant / consumer.
Operation is made comfortably
via integrated webserver or di-
rectly at the device. Measured
values are displayed neatly
arranged at device on monitor.
When the own power plant
generates more power than ac-
tually is consumed it often is more
The EFR measures the energy ow
in all 3 phases and calculates the
mean value.
Is sucient own power left, the
EFR4000IP switches on up to three
consumers and ensures that the
power is consumed in the house.
This is relatively simple if a PV system
feeds uniformly under a clear sky
and consumers with constant power
consumption, such as heat pumps
or heating elements, are connected.
Particularly suitable are consumers
that consume a lot of energy and can
be switched frequently, for example
boilers.
It becomes more complicated when
the generation varies because of
clouds before the sun and consumers
do not continuously draw current as
washers, dryers, irons or stoves.
The analog output can regulate a
consumer stepless and thus achieve
a yet higher rate of own consumption.
When using phase angle controls the
specications of the grid providers
have to be obeyed.
Energy ow is always evaluated
and displayed, as seen from a po-
wer meter for purchasing energy:
purchase from public grid is positive,
fed in energy reduces the bill and is
therefore negative (- sign).
The EFR4000IP can optimize the
consumption of own energy even
under dicult conditions.
Features and functions:
Switching of up to 3 consumers: the largest consumer, ranked 1-2-3 or combination of
3 consumers (7 levels)
Power consumption of the connected consumers
Switch on points. At which energy ow consumers are switched on
Switch on delay of consumers. Short lowering in consumption (by clocking consumers)
or peaks in the feed does not immediately cause turn on of additional consumer
Minimum on time. Heat pumps may not be switched on and o permanently, washing
machines should be able to complete a cycle.
Switch o delay. Short consumption peaks or reduction of the generated energy does
not immediately switch o a load.
Switch o point. At which energy ow consumers are switched o again. In practice,
this value is usually slightly on the purchase side.
Inputs for blinding out consumers when these are not available, for example when boiler
has reached maximum temperature.
Control of heat pumps (SG-ready), battery chargers, inverters
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Relay for Plants for Generation of own
Leistung [kW]
4:00 6:00 8:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00
Feed in
Heat pump
Examples additional consumption with EFR3000Energy Flow:
Purchase
Own consumption without EFR3000 Air conditioner
Heater for water, regulated
Heater for water, not regulated
2017-08-21
EFR4000IP
Part numbers:
EFR4000IP S225761
Suitable current transformer (split
core): 60/1A, class 3 0,4 VA
KBR 18S S225770
Suitable mini current transformer:
64/1A, class 1 0,5 VA
CTM7 S225780
