Description
2.5 Electronic trip unit ETU600
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
125
2.5.8.2 Wiring configuration
Phase-to-phase assignment
Under this menu item, the phase-to-phase assignment can be set.
Energy flow direction
In the Energy flow direction submenu, the direction for the energy flow is defined.
This setting is used for the following calculations:
• Calculation of the measured power values
• Reverse power protective function RP
• Enhanced protective functions EPF
2.5.8.3 Metering
The following parameters are defined under this menu item:
• Calculation method for phase unbalance (see Chapter )
• Phase rotation and the sign for the power factor (see Chapter )
• The calculation methods for phase unbalance are stated in Chapter Enhanced
protective functions EPF (Page 67). The specifications for the power factor are
explained in Chapter Metering function (power metering function) (Page 130).
Voltage measurement
In the case of a circuit breaker with metering function, the location of the voltage
sensors is specified in the "Voltage measurement" submenu.
If the metering function is retrofitted, the location of the voltage measurement must be
set as follows:
• Internal: internal voltage tap
• External: use of an external voltage transformer
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