8.3
Tap changer position indicator TPOSYLTC
8.3.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE
C37.2 device
number
Tap changer position indication
TPOSYLTC
TPOSM
84M
8.3.2
Function block
Figure 511: Function block
8.3.3
Functionality
The tap changer position indication function TPOSYLTC is used for transformer tap
position supervision. The binary inputs can be used for converting a binary-coded
tap changer position to a tap position status indication. The X130 (RTD) card,
available as an option, provides the RTD sensor information to be used and the
versatile analog inputs enabling the tap position supervision through mA.
There are three user-selectable conversion modes available for the 7-bit binary
inputs where MSB is used as the SIGN bit: the natural binary-coded boolean input
to the signed integer output, binary coded decimal BCD input to the signed integer
output and binary reflected GRAY coded input to the signed integer output.
8.3.4
Operation principle
The function can be enabled and disabled with the
Operation setting. The
corresponding parameter values are "On" and "Off". When the function is disabled,
the tap position quality information is changed accordingly. When the tap position
information is not available, it is recommended to disable this function with the
Operation setting.
The operation of TPOSYLTC can be described using a module diagram. All the
modules in the diagram are explained in the next sections.
Measurement functions
1MRS757644 H
976
620 series
Technical Manual
