Tap Changer Position Indication 84T - ABB 615 series Technical Manual

Section 8
Measurement functions
8.3
8.3.1
8.3.2
8.3.3
8.3.4
950

Tap changer position indication 84T

Identification
Function description
Tap changer position indication
Function block
84T
BI0 TAP_POS
BI1
BI2
BI3
BI4
BI5
SIGN_BIT
TAP_POS
END_POS_R
END_POS_L
GUID-3A750618-52D7-4C0B-8EB8-781605508E6B V1 EN
Figure 479: Function block
Functionality
The tap changer position indication function 84T 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.
Operation principle
The function can be enabled and disabled with the Operation setting. The corresponding
parameter values are "Enable" and "Disable". 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.
IEC 61850 IEC 60617
identification identification
TPOSYLTC TPOSM
1MAC059074-MB A
ANSI/IEEE C37.2
device number
84T
615 series ANSI
Technical Manual