CIRCUTOR CIRWATT-B410T Series - Manual (Page 20)

THREE PHASE STANDARD CIRWATT B METER
CIRWATT B THREE PHASE INSTRUCTION MANUAL 20 / 53
1.23.- Maximeter
The maximum is the highest active power value demanded within a period of 15 minutes, in
the time between two consecutive billing closures.
The 15-minute periods will coincide with the quarter-of-an-hour integration period of the load
curve. As such, for each hour they will begin on the minutes 0, 15, 30 and 45, ending with the
start of the following period.
The maximums are associated with each of the defined tariff periods and to the entire set.
Each one of these values is associated with the date, hour and minute in which it was
produced.
Those 15-minute periods in which a synchronism action, a power supply cut-off or
reconnection, or a parameter change or intrusion occurred, or those which have an invalid bit,
will not be taken into account when the maximum is calculated.
1.24.- Defined, active and latent contracts
A contract is considered to be defined when at least the seasons and types of day are defined.
A defined contract is active when it is being used to do the calculations necessary for billing.
The TB three-phase meter also features latent contracts. The latent contracts function allows
for the parameters of the active contract to be modified prior to the date on which it comes into
effect. A contract changes from latent to active in the moment in which the activation date is
reached, even if the device is without power or is starting up when power is recovered.
When the activation date of a latent contract is reached, the meter automatically carries out an
extraordinary immediate billing closure of the affected contract. The parameters that the latent
contract has defined are included in the active contract; the parameters of the latent contract
become undefined, with the latent contract thereby being deleted at this point.
In the event that there exists an active contract and other, different ones are defined and
activated, the registered information will not be altered in the moment of activation and all the
data of all of the active contracts will be stored and will be available for viewing.
1.25.- Modifying contracts
Modifying a contract is understood to mean defining, changing or deleting any parameter of a
previously defined contract.
Modification can affect an active or a latent contract (if there are any).
Even though the parameters of a contract form a single set, modifications can be made
partially and independently by parameter group. These groups are determined by the
coherence that exists between the parameters found in each of them.
In the event that a group of power ratings is modified, it may be necessary to previously modify
the group of seasons and types of day in order to maintain coherence.