Additional Protections And Functions - ABB SACE Emax 2 Series Operating Instructions Manual

9 - Additional protections and functions

Introduction Some protections have additional functions which extend their characteristics and performance:
Thermal Memory Protection The function, which is available for L and S protections, allows overheating in the cables connected to
S, S2, I, 2I, MCR, G zone
selectivity ProtectionS, S2, I,
2I, MCR, G, Gext, MDGF zone
selectivity Protection
83 | © 2023 ABB | 1SDH001330R1002 - ECN000297030
Name Type of protection
Thermal Memory overheating of the cables
management of trip commands in a network of
Zone selectivity
circuit-breakers
blocking of protection on the basis of programmable
Blocks
events
Startup different thresholds on the basis of monitoring thresholds 86
Current thresholds Current control with programmable thresholds
Programmable programmable commands with trip unit events or
Commands statuses
Installation of accessory modules allows the respective functions to be activated:
Name Type of protection
Gext External earth fault with adjustable delay
Rc Residual current
Synchrocheck Synchronism between two independent voltage sources
MDGF Modified differential ground fault
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)
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
Szi Input
Szo Output
Gzi Input
Gzo Output
Szc Common
Description
S, S2, I, 2I and MCR protection
selecitivity input
S, S2, I, 2I and MCR protection
selecitivity output
G, Gext and MDGF protection selectivity
input
G, Gext and MDGF protection selectivity
output
Common connection of selectivity
network
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Connection
From devices on the
load side
To devices on the
supply side
From devices on the
load side
To devices on the
supply side
The entire selectivity
network
Continued on the next page
Ekip Touch - Protections
9 - Additional protections and functions