Measuring Pro Protections; Presentation - ABB SACE Emax E1.2 Operating Instructions For The Design Engineer

10 - Measuring Pro protections

Presentation The Measuring Pro protections are available in all versions of trip units of the Touch range equipped with Ekip
75 | © 2017 ABB | 1SDH001330R0002 - ECN000058721 Rev. A
Measuring Pro module.
List of protections
The following is a list of the Measuring Pro protections:
Symbol
UV
OV
VU
UF
OF
RP
Phase Sequence
Cos φ
If the Ekip Measuring Pro module and the Ekip Synchrocheck module are present, a further selection is
activated:
Symbol
Synchrocheck
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.
Protection against
Minimum voltage
Maximum voltage
Voltage unbalance
Minimum frequency
Maximum frequency
Reverse active power
Phase sequence error
Power factor error
Function
Synchronism between two independent power
supply systems
Ekip Touch protection trip unit | 10 - Measuring Pro protections
ABB | SACE Emax 2