Manual

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100

Supporting Functions 4-3

865-UM001A-EN-P – July 2009

Number of Channels

At the maximum, there can be 12 recordings, and the maximum

selection of channels in one recording is also 12 (limited in

waveform recording). The digital inputs reserve one channel

(includes all the inputs). Also the digital outputs reserve one channel

(includes all the outputs). If digital inputs and outputs are recorded,

there will be still 10 channels left for analogue waveforms.

Available Channels

The following channels i.e. signals can be linked to a disturbance

recorder:

Table 4.3 – Available Channels

Channel Description

Available for

waveform

IL1, IL2, IL3 Phase current Yes

I’L1, I’L2, I’L3 Phase current Yes

Io1, Io2 Measured residual current Yes

f Frequency –

IoCalc Phasor sum Io = (IL1+IL2+IL3)/3 –

I’oCalc Phasor sum Io = (I’L1+I’L2+I’L3)/3 –

I1, I’1 Positive sequence current –

I2, I’2 Negative sequence current –

I2/I1, I’2/I’1 Relative current unbalance –

I2/In, I’2/I’n Current unbalance [xI

] –

IL Average (IL1 + IL2 + IL3)/3 –

I’L Average (I’L1 + I’L2 + I’L3)/3 –

DO Digital outputs Yes

DI Digital inputs Yes

THDIL1 Total harmonic distortion of IL1 –

THDI’L1 Total harmonic distortion of I’L1 –

THDIL2 Total harmonic distortion of IL2 –

THDI’L2 Total harmonic distortion of I’L2 –

THDIL3 Total harmonic distortion of IL3 –

THDI’L3 Total harmonic distortion of I’L3 –

IL1RMS IL1 RMS for average sampling –

IL2RMS IL2 RMS for average sampling –

IL3RMS IL3 RMS for average sampling –

ILmin

I’Lmin

ILmax

I’Lmax

ΔIL1,ΔIL2,ΔIL3

IL1w,IL2w,IL3w

I’L1w,I’L2w,I’L3w