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1780397M_MSW_GFX4-GFXTERMO4_08-2018_ENG

VOLTAGE VALUE ON THE LOAD (Voltmeter)

The voltage read value is present for each zone only on models with 4 CTs (GFX4-x-x-2-x-x and GFX4-x-x-4-x-x),

and is used to monitor voltage applied to a single-phase or 3-phase load, with automatic recognition of the internal voltmeter

transformer.

The value of the voltage applied to the load is saved in variable I.tV1. For each phase, the voltage value is updated

while the control output is inactive, otherwise, the value is frozen at the last valid read.

The voltmeter function is signicant with:

- 4 independent zones with 4 single-phase loads;

- 1 zone with 3-phase star load with neutral + 1 single-phase zone;

- 1 zone with 3-phase load with open triangle + 1 single-phase zone.

For a zone with single-phase load, the default value of the maximum limit or full scale of the volumetric value (H.tV1)

is 530V, and the input is linear on the interval 90...530V. The parameters for correction of offset (o.tV1) and the digital lter (Ft.

tV) refer to the voltmeter input.

If zone 1 has a 3-phase load, the following parameters are not signicant:

- I.tV1, I.tV2 and I.tV3: voltmeter value on line L1, L2 and L3, respectively;

- I.VF1, I.VF2 and I.VF3: ltered voltmeter value (see Ft.tV) on line L1, L2 and L3;

- H.tV1, H.tV2 and H.tV3: maximum limit or full scale of voltage transformer on line L1, L2 and L3;

- o.tV1, o.tV2 and o.tV3 = offset correction for voltmeter input on line L1, L2 and L3;

- Ft.tV = digital lter for voltmeter input.

ATTENTION: for load voltages below 90VAC, the

voltage read on the load and possible alarms have

no value.

gefran GFXTERMO4 User Manual

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