CIRCUTOR CIRWATT-B410T Series - Manual (Page 27)

THREE PHASE STANDARD CIRWATT B METER
CIRWATT B THREE PHASE INSTRUCTION MANUAL 27 / 53
1.31.3.- Seals
The CIRWATT Type B meter can be protected using the following seals:
1.32.- Measurement validation criteria
Energy, maximeter and excesses registers will be invalidated following the occurrence of a
series of events that implies that their values are false. In the specific case of the load curve
registers, there exists an invalid bit (IV) which indicates that that register is no longer valid. The
events that lead to this invalidity of the measurements are described below.
1.32.1.- Time synchronization with drift > T1 = 30 seconds
The quarter-of-an-hour period in which the synchronization takes place will be ignored for the power
calculation.
1.32.2.- Time synchronization with drift >10 minutes
The measurement is invalidated, i.e. flag IV = 1.
1.32.3.- Communication failure between meter and analyzer
If the communications failure coincides with the quarter-of-an-hour period change, and its
duration is longer than 30 seconds, the affected periods will be ignored for the power
calculation.
Manufacturer's seal
(underneath
the wire
cover)
Wire cover seal
Button seal
Transformer ratio seal