1SDH002031A1002 ECN000092998 Rev. B
SACE Tmax XT2
– XT4 | 43
IU Protection
Function
The protection is activated in the event of an imbalance between the currents detected. If the
detected imbalance exceeds the I6 threshold for a time greater than t6, the protection sends the
TRIP command.
The protection automatically cuts out in two cases:
The measurement of at least one current is greater than 6 In
The maximum current value of all phases is less than 0.3 In
To verify and simulate the trip times based on all the parameters, see:
Protection summary table with the operating characteristics (page 78)
Chart with tripping curve (page 87)
Parameters
Parameter
Description
Default
Enable
Enables/disables protection and availability on menu of the
parameters
OFF
Trip Enable
Activates/deactivates the open command: if disabled, the alarm
and the lapsing of the protection time are managed only as
information
OFF
Version
Enables the unbalance calculation method to be selected:
Old:
% Sbil = 100 x (I
max
- I
min
) / I
max
New:
% Sbil = 100 x = 100 x (
max I
mi
) / I
mi
NOTE:
max I
mi
: maximum deviation between measured
currents, calculated by comparing each current with the
average value; I
mi
: average value of the read currents
Old
Threshold I6
Defines the trip value that activates the protection.
The unbalance is expressed as a percentage value in a range:
2 % .. 90 %, with 1 % step
50 %
Time t6
This is the trip time of the protection; the value is expressed in
seconds, which are settable in a range: 0.5 s .. 60 s with 0.5 s step
5 s
Ekip M Touch
With Ekip M Touch IU protection is inhibited if the rms value of at least one of the phase currents
is less than 0.25 In.
Содержание SACE Tmax XT2
Страница 82: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 82 L curve IEC 60255 151 SI L curve IEC 60255 151 VI ...
Страница 83: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 83 L curve IEC 60255 151 EI L curve t k I4 ...
Страница 84: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 84 L curve Ekip M Touch S curve t k I2 ...
Страница 85: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 85 S curve t k Curve S2 I curve MCR curve 2I curve ...
Страница 86: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 86 G curve t k I2 G curve t k ...
Страница 87: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 87 IU curve UV curve UV2 curve ...
Страница 88: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 88 OV curve OV2 curve VU curve ...
Страница 89: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 89 S V curve S2 V curve RV curve ...
Страница 90: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 90 UF curve UF2 curve OF curve OF2 curve ...
Страница 91: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 91 RP curve D curve ...
Страница 92: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 92 OQ curve OP curve ...
Страница 93: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 93 UP curve RQ curve ...
Страница 94: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 94 ROCOF curve R JAM curve R STALL ...
Страница 95: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 95 UC curve ...
Страница 207: ...1SDH002031A1002 ECN000092998 Rev B ...
