Tap Changer Position Indicator Tposyltc; Identification; Function Block; Functionality - ABB RELION 620 Series Technical Manual

Protection and control

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Measurement functions

Tap changer position indicator TPOSYLTC

Function description

Tap changer position indication

Figure 511: Function block

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.

The function can be enabled and disabled with 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.

identification

Operation setting. The

1MRS757644 H

C37.2 device

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