EFR4001IP
12720-0713-00
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7.8 Program 4 (fixed starting sequence K1-K2-K3, SG ready)
Precondition:
•
Own generating unit, e.g. photovoltaic, CHP, wind rotor, water turbine, …
•
1…3 switchable consumers, same / different power e.g. heating element, heat pump (also SG ready),
rechargeable batteries, electric car, electric heating, air conditioning, ...
•
Max. 1 controllable consumer with linear phase angle or trailing-edge control 0/4 to 20 mA (0-10V),
e.g. heating element
•
1 and / or 3-phase consumers
Goal:
•
The highest possible internal consumption by gradually switching on of the consumers / loads in the
fixed starting sequence K1
– K2 – K3, at the same time the previously switched on consumers / loads
stay switched on
•
The load at K2 is switched on earliest if K1 is already switched on,
the load to K3 is switched on earliest if K2 is already switched on
•
It is ensured that the consumer K1 is always first switched on, for example, generates hot water
•
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
•
Previously switched-on consumers are not taken into account, the actual measured value P L123 is
evaluated
Connection:
•
If the infeed increases or the delivery (=import= draw) falls under the limit-ON value, which has been
set for the load or the consumer on K1, the set delay-ON time starts to count; if the limit value remains
undercut for the entire delay-ON time, the consumer on K1 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 consumer on K2
could also be switched on, it will be also switched on after the expiration of the set delay-ON time.
•
If the infeed increases or the delivery (=import= draw) continues to fall so that the consumer on K3
could also be switched on, it will be also switched on after the expiration of the set delay-ON time.
Disconnection:
•
If the infeed decreases or the delivery (=import= draw) increases over the limit-OFF value, which has
been set for the load or the consumer, the set delay-OFF time starts to count; if the limit value remains
exceeded for the entire delay-OFF time, the consumer is switched off after the expiration of the
minimum start-up time
•
All consumers are switched off in the same way
•
Shut-down does not take place in a fixed sequence
Example:
•
Analogue output: Phase angle control with heating element;
K1: Heating element for service water heating; K2 Air-conditioner; K3: Heat pump,
K1 has priority before K2, K2 has priority before K3
