Section 13
Secondary system supervision
13.3.3
282
Setting guidelines
The parameters for Fuse failure supervision VDSPVC are set via the local HMI or
PCM600.
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 connection type for the main and the pilot fuse groups must be
consistent.
The settings Ud>MainBlock, Ud>PilotAlarm and USealIn are in percentage of the
base voltage, UBase. Set UBase to the primary rated phase-to-phase voltage of the
potential voltage transformer. UBase is available in the Global Base Value groups;
the particular Global Base Value group, that is used by VDSPVC, is set by the
setting parameter GlobalBaseSel.
The settings Ud>MainBlock and Ud>PilotAlarm should be set low (approximately
30% of UBase) 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 U
is the desired pick up primary phase-to-phase voltage of measured fuse group, the
setting of Ud>MainBlock and Ud>PilotAlarm will be given according to equation
114.
Ud MainBloc k
>
or
Ud PilotAlarm
>
IECEQUATION2424 V2 EN-US
U
is defined as phase to neutral or phase to phase voltage dependent of the
SetPrim
selected ConTypeMain and ConTypePilot. If ConTypeMain and ConTypePilot are
set to Ph-N than the function performs internally the rescaling of U
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 USealIn setting. The fuse failure outputs are deactivated
when the normal voltage conditions are restored.
U
S etPrim
=
×
100
U
Base
1MRK 511 401-UEN A
GUID-0D5A517C-1F92-46B9-AC2D-F41ED4E7C39E v1
GUID-52BF4E8E-0B0C-4F75-99C4-0BCB22CDD166 v2
GUID-0B298162-C939-47E4-A89B-7E6BD7BEBB2C v2
SetPrim
(Equation 114)
.
SetPrim
Bay control REC670 2.2 IEC
Application manual