Tap Changer Position Indication Tposyltc - ABB RELION REX640 Technical Manual

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1MRS759142 C

Technical Manual

Tap changer position indication TPOSYLTC

Identification

Function description

Tap changer position indication

Function block

GUID-064CBF88-6712-44CD-A10C-0679B379B9C3 V1 EN

Function block

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 RTD module, 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.

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

identification

ANSI/IEEE C37.2

device number

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