EFR4001IP
12720-0713-00
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7.7 Program 3 (largest load combination of 7-stages)
Precondition:
•
Own generating unit, e.g.
photovoltaic, CHP, wind rotor, water turbine, …
•
3 switchable consumers (otherwise Pr 2), different powers, e.g. heating element, electric heating, ...
•
Is ideal for switching heating levels
•
Max. 1 controllable consumer with linear phase angle or trailing-edge control 0/4 to 20 mA (0-10V)
•
1 and / or 3-phase consumers
Goal:
•
The highest possible internal consumption by switching on of the largest-possible load combination
•
Taking into account the analogue consumed power, it is possible to switch on a relay if the relay is
switched on and the controlled consumer is reduced (relays have priority)
Measurement:
•
The EFR4001IP monitors the accumulated flow of energy at the grid connection point
(between the public power grid and the consumers / generators)
Feature:
•
Analogue controlled consumers are taken into account
•
Consumers that are already switched on are taken into account
(which is why the typical power consumption of the consumer has to be set)
Connection:
•
All 7 levels have a common SWITCH-OFF value and the same delay-ON, delay-OFF and minimum on
time
•
If the infeed increases or the delivery (=import= draw) falls under the set SWITCH-OFF value + load
size of the stages, the set delay-ON time starts to count. If the limit value remains undercut for the
entire delay-ON time, the first consumer is switched on and the set minimum start-up time begins to
count.
•
If the infeed increases or the delivery (=import= draw) continues to fall so that the next largest
combination could be switched on, the smaller combination will be switched off and the larger one
switched on after the expiration of the set minimum start-up time + delay ON time.
•
All combinations are switched on in the same way.
Disconnection:
•
If the infeed decreases / the delivery (=import= draw) increases over the set SWITCH-OFF value, the
set delay-OFF time starts to count. If the SWITCH-OFF value remains exceeded for the entire delay-
OFF time, the combination is switched off after the expiration of the minimum start-up time.
•
When switching back to the next lower level, the delay-ON time does not run down again, which
results that the excess energy is being efficiently used.
Example:
•
3 heating elements with the same/different power; all 3 can be operated simultaneously
