ABB | SACE Tmax XT
72 | © 2019 ABB | 1SDH002039A1002 - ECN000093027 - Rev. A
Protections | 9 - Additional protections and functions
9 - Additional protections and functions
Introduction
Some protections have additional functions which extend their characteristics and performance:
Name
Type of protection
Page
Thermal Memory
overheating of the cables
Zone selectivity
management of trip commands in a network of circuit-breakers 72
Blocks
blocking of protection on the basis of programmable events
Startup
different thresholds on the basis of monitoring thresholds
The presence of
Ekip Synchrocheck
allows the protections of the module to be activated (page 76)
Thermal Memory
The function, which can be activated for L and S protections, allows overheating in the cables connected to
the device controlled by Ekip Touch to be prevented: in the case of several open commands within a brief
interval, the unit considers the time between commands and the entity of the faults so as to reduce trip time.
NOTE:
the function also changes the trip time in the case of overloads which have not led
to the open command
S, S2, G zone selectivity
The function, which can be activated for S, S2 and G protections (if available and enabled), allows several
devices belonging to the same installation (including Ekip Touch) to be interconnected, so as to handle trip
commands in the best possible way in the case of S, S2 and G protections.
The function, which can be activated for S, S2, G and Gext protections (if available and enabled), allows
several devices belonging to the same installation (including Ekip Touch) to be interconnected, so as to
handle trip commands in the best possible way in the case of S, S2, G and Gext protections.
The function allows the devices to be coordinated so that, if a fault occurs:
• the device nearest to the fault trips
• the other devices are blocked for a programmable time
NOTE:
connection can be made between ABB devices that have the zone selectivity function
Characteristics
Ekip Touch has five selectivity connections, located on the rear connectors of the CB:
Name
Type
Description
Connection
Szi
Input
S and S2 protection selecitivity input
From devices on the load
side
Szo
Output
S and S2 protection selecitivity output
To devices on the supply side
Gzi
Input
G protection selectivity input
From devices on the load
side
Gzo
Output
G protection selectivity output
To devices on the supply side
Szc
Common
Common connection of selectivity network
The entire selectivity network
Continued on the next page
