1SDH002031A1002 ECN000092998 Rev. B
SACE Tmax XT2
– XT4 | 71
Zone selectivity
S, S2, and G [2]
Configuration
For a correct configuration of the selectivity network of one or more protections:
1. Connect the zone selectivity outputs of the same type (example: Szo) of the devices
belonging to the same zone to the zone selectivity input of the device immediately upstream
(example: Szi).
2. Connect all the Szcs of the devices of the same network to each other.
3. The time t2 must be configured to a value greater than or equal to t2 sel + 50 ms, excluding
the device that is furthest downstream in its network.
Logical table
The table shows all cases in which
– with zone selectivity enabled on the device – there is an
alarm condition or a zone selectivity signal coming from another device.
NOTES:
The table shows the case of S protection but it is also valid for the other
protections
– G and S2 – each with their respective connections
If the protection selectivities that share the same connections are active at the
same time (example: S and S2), the inputs/outputs are managed with OR logic.
Carefully configure the parameters of the protections to avoid unwanted openings
Condition
Szi
Szo
Tripping time
Comments
If < I2
0
0
No TRIP
The device is not in alarm status
If < I2
1
1
No TRIP
The device is not in alarm status but transmits
the selectivity signal received from the device
upstream
If > I2
0
1
t2 sel
The device is in alarm status and is the first to
detect the fault: trips in the time t2 sel
If > I2
1
1
t2
The device is in alarm status but is not the first
to detect the fault: trips in the time t2
D Zone selectivity
Preface
The function, which can be activated for the D protection (if available and enabled), allows
connecting several devices belonging to the same system, including Ekip Touch, to better
manage the trip commands in case of D protection.
It is particularly useful in ring and grid systems where it is essential to define both the area and
the direction of the flow that powers the malfunction.
The function allows coordinating the devices so that in the event of a malfunction:
The device closest to the malfunction is triggered
The other devices are blocked for a programmable time
NOTES:
The connection is possible between ABB devices that have the zone selectivity
function
For correct use of the D selectivity function disable the zone selectivity of the S,
S2 and G protections
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 ...
