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8.3
Tap changer position indication 84T
8.3.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Tap changer position indication
TPOSYLTC
TPOSM
84T
8.3.2
Function block
84T
BI0
BI1
BI2
BI3
BI4
BI5
SIGN_BIT
TAP_POS
END_POS_R
TAP_POS
END_POS_L
GUID-3A750618-52D7-4C0B-8EB8-781605508E6B V1 EN
Figure 479:
Function block
8.3.3
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.
8.3.4
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.
Section 8
1MAC059074-MB A
Measurement functions
950
615 series ANSI
Technical Manual
Содержание Relion 615 series
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