1SDH002031A1002 ECN000092998 Rev. B
SACE Tmax XT2
– XT4 | 56
OF2 Protection
Function
The OF2 Protection works like the OF Protection: if the grid frequency read by the unit exceeds
the f18 threshold for a time greater than t18, the protection sends the TRIP command.
It is independent of OF protection and it is therefore possible to program thresholds and functions
of the two protections to take advantage of different system solutions (example: signaling with
OF and opening command with OF2 or vice versa, or both for signaling or for tripping).
The protection automatically cuts out if the maximum line-to-line voltage value is less than 30 V.
To verify and simulate the trip times based on all the parameters, see:
Protection summary table with the operating characteristics (page 79)
Chart with tripping curve (page 90)
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
Threshold
f18
Defines the value that activates the protection.
The value is expressed both as an absolute value (Hertz) and as a
relative value (Fn), settable in a range:
1 Fn .. 1.1 Fn with 0.001 Fn step
1.1 Fn
Time t18
This is the trip time of the protection; the value is expressed in
seconds, which are settable in a range:
0.06 s .. 300 s, with 0.01 s step
3 s
Constraints, limitations, and additional functions
From the service connector (with Ekip Connect) or with system bus communication it is also
possible to access the block functions, see page70.
Summary of Contents for SACE Tmax XT2
Page 84: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 84 L curve Ekip M Touch S curve t k I2 ...
Page 86: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 86 G curve t k I2 G curve t k ...
Page 87: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 87 IU curve UV curve UV2 curve ...
Page 88: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 88 OV curve OV2 curve VU curve ...
Page 89: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 89 S V curve S2 V curve RV curve ...
Page 90: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 90 UF curve UF2 curve OF curve OF2 curve ...
Page 91: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 91 RP curve D curve ...
Page 92: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 92 OQ curve OP curve ...
Page 93: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 93 UP curve RQ curve ...
Page 94: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 94 ROCOF curve R JAM curve R STALL ...
Page 95: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 95 UC curve ...
