25
SME2-IS - Manual - 06- 2021
FUNCTIONAL CHARACTERISTICS
Led V4-V8-V12 indicates that calibration is running:
• at the start of the automatic phase, led V4-V8-V12 ashes.
• at the end of calibration, led V4-V8-V12 turns steady on for 10 seconds.
The automatic phase can last from a few seconds to as much as 1 minute.
The outcome of the calibration can be checked by viewing the respective item in the menu “Read \
Self-test”.
Calibration procedure (RGDAT)
The procedure must be run when the device is rst installed and when it is moved to other installa-
tions, or when any of the capacitive dividers are replaced.
The procedure calibrates the phase voltages V
4C
, V
8C
, V
12C
.
With the device powered on and voltages
V
4C
, V
8C
, V
12C
available, launch the Start Calibration com-
mand in the menu “Commands \ V4-V8-V12 Calibration”.
Led V4-V8-V12 indicates that calibration is running:
• at the start of the automatic phase, led V4-V8-V12 ashes.
• at the end of calibration, led V4-V8-V12 turns steady on.
The automatic phase can last from a few seconds to as much as 1 minute.
The outcome of the calibration can be checked by viewing the respective item in the menu “Read \
Self-test”.
4.4 INPUTS/OUTPUTS
Measurement inputs
The following inputs are available:
• Three amperometric phase inputs
• Three voltmetric line inputs
• The relay, connected as RGDM, measures the phase currents and voltages (I
4
, I
8
, I
12
and U
4
, U
8
,
U
12
)
and calculates the homopolar current and voltage (I
O
and V
O
) and the phase-to-phase voltages
U
L4-8
, U
L8-12
, U
L12-4
Active sensor inputs
Passive sensor inputs
* Used for the RVL function and as V
Synch
for function 25
V
4
V
8
V
12
*
SMART TERMINATION
3 line voltage inputs
3 phase current inputs
3 line voltage inputs
3 phase current inputs
Capacitive
voltage
dividers
V
4
V
8
V
12
*
SMART TERMINATION
3 line voltage inputs
3 phase current inputs
3 line voltage inputs
3 phase current inputs
Capacitive
voltage
dividers
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