Page 42 - MCCB-XT5

ABB | SACE Tmax XT
Protections

1 - Protections - Introduction

Operating principle The protection functions are available with all Ekip Touch models and versions.
Each protection is associated with a different signal (current, voltages, frequencies, powers, etc) but the
operating principle is the same:
1. If the signal measured exceeds the set threshold, the specific protection activates (prealarm and/
or alarm).
2. The alarm appears on the display and, after a period of time (timing t ), depending on the
t
protection parameters set, can convert into a trip command (TRIP) transmitted to the internal
Trip coil of the CB.
NOTE:
• if the signal measured drops below the set threshold before the trip time has elapsed, Ekip
Touch quits the alarm and/or timing status and returns to the normal operating condition
• all protections have a default configuration: check the parameters and change to suit the
installation requirements before putting into service

TRIP When the Ekip CI module is present, Ekip M Touch allows a different TRIP configuration to be selected so
that, if a trip occurs, a contact of the Ekip CI module connected to an external remote control switch is
commanded (Normal mode).
NOTE: TRIP is always controlled by a command to the Trip Coil for protections I and G

Consult the parameters used with Ekip Touch MLRIU for further details (page 121).

References Many of the protection thresholds are displayed in two different quantities: absolute value and relative
value.
The relative value depends on the type of measurement:
Type of protection Reference Description
Current In Nominal current of the Rating plug
Voltage Un Line-to-line voltage setting
Frequency fn Frequency setting
Power Sn √3 x In x Un

Protections packages The protections described in the following chapters are grouped into packages, the availability of which
depends on the model and version of the Trip unit, and on their ability to be installed as additional
package:

Package Page
Standard Protections 41
Voltage protections 51
Voltage Advanced protections 54
Frequency protections 58
Power protections 61
ROCOF protections 67
Adaptive protections 68
Motor protections 69
Additional protections and functions 73

40 | © 2022 ABB | 1SDH002039A1002 - ECN000212994 Protections | 1 - Protections - Introduction