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All copying, even partial, of this manual is strictly forbidden
RG66007967 - Rev 02
6.2
ELECTRICAL LOAD MANAGEMENT FUNCTION
This function allows the electrical loads to be managed and
priorities to be assigned to our HiWarm system or other
utilities, such as appliances.
This function requires a current transformer (CT) set
upstream the mains meter. This CT must be of good quality
(class I) and the selected ratio must guarantee a constant
amperometric signal to the secondary within the 0.5 ÷ 5A
range.
Its power must be equal to or greater than 5VA to guarantee
regulation precision.
If it is installed away from the regulator, the dissipated power
from the connection wires (approx. 0.2 VA per metre on
two-wire lines with a 2.5 mm
2
section) must be added to the
normal amperometric consumption (approx. 2 VA) and that
of any instruments connected in the amperometric circuit.
The wires used for the CT secondary connection must have a minimum section of 2.5 mm
2
.
The CT connection must not be protected by a fuse or interrupted by an isolator switch.
The user must insert the current transformer (CT) on the system line that is to be corrected, upstream the network loads and
the branch point of the power supply for the power factor correction panel: the installed CT must measure all the absorbed
currents of the system, inductive (motors or similar) as well as capacitive (condensers). Any condensers for the fixed power
factor correction must be installed downstream the CT, unless they are used for the power factor correction of the system
power supply transformer.
Professionally qualified personnel may carry out the installation according to the instructions. The installer must connect
the wires to the transformer in the correct direction for the CT to function correctly (as indicated in the structure of the CT).
Otherwise, they will be connected incorrectly and result in poor performance or possibly null.
An incorrect installation can harm persons or damage objects for which the manufacturer cannot be held liable.
The CT is then connected to the microprocessor of the HiWarm, which controls the utility energy absorption, according to
the power available that reaches it from the CT, with a possible derating of the HiWarm or turning off the other utilities, if
required.
By doing so, the management and distribution of the absorbed current over time can be understood and the saved data are
archived and can be downloaded via a serial port.
LOAD
MAINS
Other utilities
(e.g. appliances)
Microprocessor
utility programmable
management control
