CIRCUTOR MDC-4 - Manual (Page 13)

4�- OPERATION
4.1.- OPERATING PRINCIPLE
The MDC-4 has been designed to control the maximum demand of an installation.
The unit is equipped with a power analyzer that measures electrical parameters at the connec-
tion point.
The unit calculates the maximum demand by scrolling window, do not need a sync pulse.
Depending on the unit's configuration and bearing in mind the calculated maximum demand,
the unit connects and disconnects the installation's electrical loads (which should not be priority
loads) in order to avoid exceeding the configured maximum power. Load connection or discon-
nection depends on the instantaneous level of maximum demand. This system proceeds to
disconnect the loads in accordance with the % maximum demand value measured.
The load control by level ensures that the user does not exceed the contracted power, which
generally implies having to pay high penalties. At the same time, it enables adjusting the con-
tract to the real power each installation needs and managing the punctual disconnection of
some non-priority loads, which also results in important power savings in the electricity bill.
The unit is equipped with relay outputs for the management of up to 4 electrical loads or load
groups.
Example: Let's take an installation such as that shown in Figure 5 , in which the level of each
of the output relays has been programmed as follows:
OUT1: 70% of the contracted power.
OUT2: 80% of the contracted power.
OUT3: 90% of the contracted power.
OUT4: 95% of the contracted power.
Figure 5: MDC-4 installation�
13 Instruction Manual
MDC-4