ABB | SACE Emax 2
Ekip Touch protection trip unit | 10 - Measuring Pro protections75 | © 2017 ABB | 1SDH001330R0002 - ECN000058721 Rev. A
10 - Measuring Pro protections
Presentation
The Measuring Pro protections are available in all versions of trip units of the Touch range equipped with Ekip
Measuring Pro module.
List of protections
The following is a list of the Measuring Pro protections:
Symbol Protection against
UV Minimum voltage
OV Maximum voltage
VU Voltage unbalance
UF Minimum frequency
OF Maximum frequency
RP Reverse active power
Phase Sequence Phase sequence error
Cos φ Power factor error
If the Ekip Measuring Pro module and the Ekip Synchrocheck module are present, a further selection is
activated:
Symbol Function
Synchrocheck
Synchronism between two independent power
supply systems
Operating principle
The protections have a series of parameters available allowing the user to adjust the activation thresholds and
the opening times of the circuit-breaker.
The operating principle of all the protections is similar: if the voltage, frequency or power signal exceeds the
set protection threshold, the specific protection will enter the alarm condition and will begin to delay.
The duration of the delay depends on the threshold and time parameters set, and depending on the dynamic
of the signal we can have two behaviours:
• If the alarm condition persists, the trip unit opens the circuit-breaker.
• If the signal drops below the protection threshold, the trip unit exits from the alarm condition, interrupts
the delay and doesn't open the circuit-breaker.
The protection thresholds are distinguished by type:
• The voltage protections are related to the rated size of the voltage line-to-line set on the trip unit (Un).
• The frequency protections are related to the frequency set on the trip unit (fn).
• The power protections refer to the product of current and rated voltage (Sn = √3 * In * Un).
IMPORTANT:
• To manage the circuit-breaker tripping with a specific protection, the protection itself
must be enabled and, if supported, must have the Trip Enable parameter activated.
• All the protections have a default configuration: if enabled, check the parameters and
make the necessary changes according to the requirements of your installation.
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