Current Value On Load - gefran GFW ADV Configuration Manual

CURRENT VALUE IN LOAD
The RMS current value is read in variable Ld.A of each zone.
If zone 1 has a 3-phase load, variable Ld.At contains the average value of the three RMS currents. The Ld.A of the first three
zones contain the RMS current value on lines L1, L2 and L3, respectively..
Accuracy is better than 1% in start modes ZC, BF and HSC.
Accuracy is better than 3% in PA mode with conduction angle >90°, and better than 10% for lower conduction angles.
The circulating current in the load is acquired with a 0.25ms sampling time.
In addition, there are the following parameters for a zone with single-phase load:
I.tA1 instantaneous ammeter value
I.AF1 filtered ammeter value (see Ft.tA)
I1on current with active control
o.tA1 ammeter input offset correction
Ft.tA ammeter input digital filter
There are also the following parameters if zone 1 has a three-phase load:
I.tA1, I.tA2 and I.tA3 instantaneous ammeter value on line L1, L2 and L3
I.AF1, I.AF2 and I.AF3 filtered ammeter value (see Ft.tA) on line L1, L2 and L3
I1on, I2on and I3on current with active control
o.tA1, o.tA2 and o.tA3 ammeter input offset correction on line L1, L2 and L3
Ft.tA ammeter input digital filter
If diagnostics detects a fault condition on the load, the red ER LED will flash in synch with yellow LED O1 or O2 or O3 for the
zone in question.
The condition POWER FAULT in OR with HB alarm can be assigned to an alarm or identified in the state of a bit in variables
STATUS, STATUS1, STATUS2 and STATUS3.
In STATUS3 you can identify the condition that activated the POWER_FAULT alarm.
POWER_FAULT diagnostics is configurable with parameter hd.2, with which even just a part may be enabled
SSR SHORT SSR module in short circuit
NO VOLTAGE power failure or interrupted fuse
NO CURRENT due to SSR module open or fuse or load interrupted
For alarm HB (load partially interrupted), refer to the specific section of this manual.
The default value of the maximum limit or ammeter full-scale depends on the model:
MODEL H.tA
40A 80,0
60A 120,0
100A 200,0
150A 300,0
200A 400,0
250A 500,0
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80963B_MSW_GFW_11-2012_ENG