18
CIRWATT B 400
Instruction Manual
used are those indicated by the totalizers when the command is received. Closing using the button
affects all active contracts, whilst closing using a communication message can affect one or more
active contracts.
Automatic closing�
These are programmable parameters that specify the date on which each
contract is automatically closed. The date may contain wildcards for the month and year. This type
of closing can affect one or more active contracts.
An extraordinary immediate closing is automatically done in the following cases:
Change in transformation ratio. Affects every contract.
Change of power contracted by period. Affects the modified contract.
Change of season or type of day. Affects the modified contract.
2�22 - MAXIMETER
The maximum refers to the highest value of average active power demanded in a 15-minute period in
the time between two consecutive billing period closings.
The 15-minute periods will coincide with the integration periods of the 15-minute load curve; that is,
for each hour, they will start at minute 0, 15, 30 and 45, ending when the next period begins.
The maximums are associated with each of the tariff periods defined and with all the periods as a
whole. Each of these values is stamped with the date, time and minute when it was recorded.
The 15-minute periods where a synchronism event, an outage or a power restoration occurs, or that
have an invalid bit, change in parameters or a tamper event, will not be considered for the purposes of
calculating the maximum.
2�23 - DEFINED, ACTIVE AND LATENT CONTRACTS
A contract is said to be defined when at least the seasons and the types of day are defined.
A defined contract is active when it is being used to do the calculations necessary for billing.
The three-phase TB meter allows for latent contracts. The purpose of latent contracts is to allow the
parameters of the active contract to be modified at some date before it goes into effect. A contract
goes from latent to active on its activation date, even if the device is not powered or when it is initial-
ised after power is restored.
Once the activation date of a latent contract is reached, the analyser has to automatically close out
the immediate extraordinary billing cycle of the affected contract. The parameters defined in the latent
contract will be incorporated into the active contract, the parameters of the latent contract become
indefinite, and the contract that had been latent until that time will be deleted.
If there is an active contract and contracts other than the existing one are defined and activated, at the
time of activation, the information recorded will not be altered and the data on all the active contracts
will be displayed and stored.
