Page 29 - Sace Emax 2 Manual Touch Protection breakers

ABB | SACE Emax 2
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 protection
t
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
• to allow circuit-breaker tripping to be controlled by a specific protection, the protection itself
must be enabled

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

27 | © 2019 ABB | 1SDH001316R1002 - ECN000086501 - Rev. A Protections | 1 - Protections - Introduction