Setting Up the MicroLogic Trip Unit

Prior to setting up the protection functions or carrying out measurements, set up the following parameters of the MicroLogic trip unit:

Display language
Date and time
Circuit breaker type
Power sign
Transformation ratio between the primary and secondary windings (if an auxiliary voltage transformer is installed)
Rated frequency

Selecting the Display Language

Step	Action
1	Press . The History, Maintenance and Setup menu opens. Press to select MicroLogic setup
2	Press . The MicroLogic setup menu opens. The Language menu is selected by default.
3	Press . The Language menu opens. Press to select the required language.
4	Press to confirm the selection. The hour glass displays while the settings is being saved.

Returning to English

Return to the default screen by pressing any of the three buttons without a lit LED:

or press followed by any of the three buttons .
Select the History, maintenance and setup menu by pressing .
Move the cursor to the first menu item and then down to the third menu item to select the MicroLogic setup menu .
Select Language by moving the cursor up to the first menu item. Press to confirm the selection.
Select English from the list and confirm the selection.

Setting the Date and Time

Follow this procedure to set the date and time of the MicroLogic trip unit. The date and time are used for time-stamping in the trip and alarm histories.

Step	Action
1	Press . The History, Maintenance and Setup menu opens. Press to select MicroLogic setup
2	Press . The MicroLogic setup menu opens. Press to select Date and time.
3	Press . The Date and time menu opens.
4	Press . The day element of the date is highlighted. Use the and buttons to select the day.
5	Press . The month element of the date is highlighted. Use and to select the month.
6	Press . The year element of the date is highlighted. Use and to select the year.
7	Press .
8	Press to select the time. Press . The hour element of the time is highlighted. Set the time (hours, minutes and seconds) in the same way as for the date. The resolution of the time setting is 20 ms.

NOTE: Date and time are backed up by battery.

NOTE: If the MicroLogic trip unit is connected to an Ethernet interface configured in SNTP mode, manual update of the MicroLogic date and time is possible but is immediately replaced by the date and time of the Ethernet interface.

If time is not synchronized via the communication module, a drift of up to one hour per year may be observed.

Selecting the Circuit Breaker

Follow this procedure to set the characteristics of the circuit breaker.

Step	Action
1	Press . The History, Maintenance and Setup menu opens. Press to select MicroLogic setup
2	Press . The MicroLogic setup menu opens. Press to select Breaker selection.
3	Press . The Breaker selection menu opens. Press to select Standard.
4	Press . The Standard options are highlighted. The default setting is Not def. Press to select the required standard. IEC/GB ANSI IEC UL
5	Use the navigation buttons to access and set the Circuit breaker. Press to confirm the selection.
6	Use the navigation buttons to access and set the type.
7	Press to confirm the selection.
8	Note the circuit breaker code (code = 03E7 in the example). The circuit breaker code is required to identify the device and activate the contact-wear counter. Enter this code when setting up a new trip unit on the circuit breaker. For a new device, the code is set to zero. When the main circuit-breaker contacts are replaced, this code must be reset to zero.

NOTE: If the phase-rotation protection function is activated, do not select the 400 Hz frequency. If the 400 Hz frequency is selected, the phase-rotation protection function is disabled.

Selecting the Sign of the Power

By default, the MicroLogic P trip unit uses P+ for the power flowing from top to bottom terminals. The selected direction of flow is valid for:

Measurement of power and the power factor
Measurement of energy
Load shedding and reconnection depending on power

Step	Action
1	Press . The History, Maintenance and Setup menu opens. Press to select MicroLogic setup
2	Press . The MicroLogic setup menu opens. Press to select Power sign.
3	Press . The Power sign menu opens.
4	Use the navigation buttons to access and set the Power sign. Press to confirm the selection.

Entering the Voltage-Transformation Ratio

If the supply voltage for the trip unit exceeds 690 V, install a PTE external voltage measurement input option and an external voltage transformer.

If an external voltage transformer is installed, to display the true voltage values, enter the transformation ratio between the primary and secondary voltages of the transformer.

Step	Action
1	Press . The History, Maintenance and Setup menu opens. Press to select MicroLogic setup
2	Press . The MicroLogic setup menu opens. Press to select VT ratio.
3	Press . The VT ratio menu opens.
4	Use the navigation buttons to access and set the Primary VT ratio. Press to confirm each selection.
5	Use the navigation buttons to access and set the Secondary VT ratio. Press to confirm each selection.

Entering the Rated Frequency

Step	Action
1	Press . The History, Maintenance and Setup menu opens. Press to select MicroLogic setup
2	Press . The MicroLogic setup menu opens. Press to select System frequency.
3	Press . The System frequency menu opens.
4	Use the navigation buttons to access and set the frequency. Press to confirm the selection.

NOTE: If the phase-rotation protection function is activated, do not select the 400 Hz frequency. If the 400 Hz frequency is selected, the phase-rotation protection function is disabled.