Thytronic SME2-IS User Manual

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SME2-IS - Manual - 06 - 2021
FUNCTIONAL CHARACTERISTICS
4.3 CONFIGURATION AND CALIBRATION
The device can be congured for two modes of operation:
• RGDM
• RGDAT
The mode can be set in the “Set \ Base” menu.
The measurement inputs are used by the device's functions according to its conguration, as fol-
lows:
RGDM
Channel Transducer type Measurement Function
V
4 Combined sensor (I/V) Phase voltage Protection/automation
V
8 Combined sensor (I/V) Phase voltage Protection/automation
V
12 Combined sensor (I/V) Phase voltage Protection/automation
I
4 Combined sensor (I/V) Phase current Protection/automation
I
8 Combined sensor (I/V) Phase current Protection/automation
I
12 Combined sensor (I/V) Phase current Protection/automation
V
4c Capacitive voltage divider Phase voltage 25
V
8c Capacitive voltage divider Phase voltage 25
If the device has been congured as RGDM is the “Set/Base” menu, you can set which voltage is to
be used as a reference for the synchrocheck function (25) as follows:
SYNC Reference
U
L4
V
4c
V
8c
RGDAT
Channel Transducer type Measurement Function
V
4c Capacitive voltage divider Phase voltage Protection/automation
V
8c Capacitive voltage divider Phase voltage Protection/automation
V
12c Capacitive voltage divider Phase voltage Protection/automation
I
4 Sensor (I) Rogowsky Phase current Protection/automation
I
8
/I
O Sensor (I) Rogowsky Phase/homopolar current Protection/automation
I
12 Sensor (I) Rogowsky Phase current Protection/automation
If the device is congured as RGDAT in the “Set/Base” menu, you can select the type of current
measurement for channel I8/Io as follows:
I
8
/I
O
Measurement Measurement calculated internally
I
8 Phase current
I
o
=I
4
+I
8
+I
12
I
O Ground current
I
8
=-I
4
-I
12
+I
o
Calibration
The calibration procedure adapts the device's voltage inputs to the capacitive transducers on the
substation enclosures; it must be run when there are no faults on the grid, and consists in acquiring
the phase voltage readings and normalising the variables correlated to the voltage measurements
and their thresholds.
The calculated parameters are memorised in non-volatile memory so that they are maintained even
when auxiliary power is not available.
Calibration procedure (RGDM)
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 reference voltage U
L4
(see table above).
With the device powered on and voltage U
L4
available, launch the Start Calibration command in the
menu “Commands \ UL4 Calibration”.

Thytronic SME2-IS Specifications

General

Brand	Thytronic
Model	SME2-IS
Category	Security Sensors
Language	English