1SDH002031A1002 ECN000092998 Rev. B
SACE Tmax XT2
– XT4 | 50
16 - Advanced Voltage Protections
List
The Advanced Voltage protections, configurable on all models as an additional software
package, are:
Name
Type of protection
Page
S(V)
Short circuit with voltmeter control
S2(V)
Short circuit with voltmeter control
RV
Residual voltage
S(V) Protection
Function
The S(V) protection protects against short circuits, with a threshold sensitive to the voltage value.
If the current of one or more phases exceeds the I20 threshold for a time greater than t20, the
protection is activated and sends the TRIP command.
Following a voltage drop, the I20 threshold varies according to two different modes:
Scal
(step) provides a step variation based on the parameters Ul and Ks.
Lin
(linear) provides a dynamic variation based on the parameters Ul, Uh, and Ks.
Figure 20
To verify and simulate the trip times based on all the parameters, see:
Protection summary table with the formulas for calculations (page 79)
Chart with tripping curve (page 89)
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
Function
Enables the operating mode Scal or Lin to be selected:
Scal
Threshold I20
Defines the value that activates protection and contributes to calculating
trip time.
The value is expressed both as an absolute value (Ampere) and as a
relative value (In), settable in a range: 0.6 In .. 10In with 0.1 In step
1 In
Scal
Lin
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 ...
