ABB Relion 670 Series Applications Manual page 262

Section 11
Secondary system supervision
The voltage input type (phase-to-phase or phase-to-neutral) is selected using ConTypeMain and
ConTypePilot parameters, for main and pilot fuse groups respectively.
The settings Vdif Main block, Vdif Pilot alarm and VSealIn are in percentage of the base voltage, VBase.
Set VBase to the primary rated phase-to-phase voltage of the potential voltage transformer. VBase is
available in the Global Base Value groups; the particular Global Base Value group, that is used by
VDSPVC (60), is set by the setting parameter GlobalBaseSel.
The settings Vdif Main block and Vdif Pilot alarm should be set low (approximately 30% of VBase) so that
they are sensitive to the fault on the voltage measurement circuit, since the voltage on both sides are
equal in the healthy condition. If V
measured fuse group, the setting of Vdif Main block and Vdif Pilot alarm will be given according to
equation 93.
Vdif Main block or Vdif Pilot alarm=
ANSI13000279 V1 EN-US
V is defined as phase to neutral or phase to phase voltage dependent of the selected
SetPrim
ConTypeMain and ConTypePilot. If ConTypeMain and ConTypePilot are set to Ph-N than the function
performs internally the rescaling of V
When SealIn is set to On and the fuse failure has last for more than 5 seconds, the blocked protection
functions will remain blocked until normal voltage conditions are restored above the VSealIn setting. The
fuse failure outputs are deactivated when the normal voltage conditions are restored.
11.3 Voltage based delta supervision DELVSPVC(78V)
11.3.1 Identification
Function description
Voltage based delta supervision
11.3.2 Application
In a weak grid networks, fault detection and operation of other protection functions is reliably done by
delta supervision functionality. In this type of network, a delta based release criteria is used to release the
trip signal. The measurement of delta differs from country to country between magnitude, vector or
sample based detection.
In this function, a voltage based delta supervision is implemented in a phase segregated design. The
delta function has the following features:
256
The connection type for the main and the pilot fuse groups must be consistent.
is the desired pick up primary phase-to-phase voltage of
SetPrim
V
SetPrim
V
Base
SetPrim
IEC 61850
identification
DELVSPVC
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⋅100
.
IEC 60617
identification
–
1MRK 505 370-UUS Rev. K
GUID-0B298162-C939-47E4-A89B-7E6BD7BEBB2C v2
(Equation 93)
GUID-579ED249-B8C9-4755-9E80-28E2BA8E5377 v2
GUID-C7108931-DECA-4397-BCAF-8BFF3B57B4EF v2
ANSI/IEEE C37.2
device number
7V_78V
GUID-D179DBA4-B068-4A1E-A53E-477BD3B6ACFC v2
Busbar protection REB670
Application manual