ABB | SACE Emax 2
Ekip Touch - Protections
9 - Additional protections and functions
83 | © 2023 ABB | 1SDH001330R1002 - ECN000297030
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 83
Zone selectivity
management of trip commands in a network of
circuit-breakers
83
Blocks
blocking of protection on the basis of programmable
events
86
Startup different thresholds on the basis of monitoring thresholds 86
Current thresholds Current control with programmable thresholds 91
Programmable
Commands
programmable commands with trip unit events or
statuses
92
Installation of accessory modules allows the respective functions to be activated:
Name Type of protection Page
Gext External earth fault with adjustable delay 87
Rc Residual current 90
Synchrocheck Synchronism between two independent voltage sources 92
MDGF Modified differential ground fault 88
Thermal Memory Protection
The function, which is available for L and S protections, allows overheating in the cables connected to
the circuit-breaker to be prevented: in the case of trips within brief intervals, the unit considers the time
between commands and the entity of the faults so as to reduce opening time.
IMPORTANT: for the S protection the function can be activated if the selected curve is
time-dependent.
NOTE: the function also reduces the trip time in the case of overloads which have not
led to the open command (longer than 100 ms)
S, S2, I, 2I, MCR, G zone
selectivity ProtectionS, S2, I,
2I, MCR, G, Gext, MDGF zone
selectivity Protection
The function, which can be activated for S, S2, I, 2I, MCR, G, Gext and MDGF 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, I, 2I, MCR, G,
Gext and MDGF 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, S2, I, 2I and MCR protection
selecitivity input
From devices on the
load side
Szo Output
S, S2, I, 2I and MCR protection
selecitivity output
To devices on the
supply side
Gzi Input
G, Gext and MDGF protection selectivity
input
From devices on the
load side
Gzo Output
G, Gext and MDGF 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
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