Setting Principles

With the protective cover open, make all the necessary settings for your trip unit:

• Use the dials to set MicroLogic P protection thresholds and time delays for overloads, short-circuits, ground faults and earth leakage.

  If the set thresholds are overrun, these protection functions systematically trip the circuit breaker.

• Use the buttons on the keypad:

  • For fine adjustments of the protection thresholds and time delays for overloads, short-circuits, ground faults and earth leakage. The value previously set using a dial automatically becomes the maximum value for the keypad settings

  • To activate and set the MicroLogic P functions not accessible via the dials.

With the protective cover closed, it is not possible to set the protection functions. However, it is possible to set metering functions and alarms, as well as view all measurements, settings and histories.

For remote settings using the communication option, see the Remote settings section in the Com setup menu under History, maintenance and setup.

Setting Protection Functions Using the Dials

Step	Action
1	Open the protective cover.
2	Make the necessary settings using the dials.
3	The screen automatically displays the relevant curve.
4	Check the set value on the screen, in absolute value in amperes (A) and in seconds (s).

NOTE: A new overload (long-time) or short-circuit (short-time and instantaneous) protection setting made using one of the dials:

• Deletes all the fine adjustments previously made using the keypad for the overload (long-time) and short-circuit (short-time and instantaneous) protection.

• Does not affect the fine adjustments made using the keypad for ground-fault and earth-leakage protection.

• Does not affect any other settings made using the keypad.

Similarly, a new ground-fault or earth-leakage protection setting made using one of the dials:

• Deletes all the fine adjustments previously made using the keypad for the ground-fault and earth-leakage protection.

• Does not affect the fine adjustments made using the keypad for the overload (long-time) and short-circuit (short-time and instantaneous) protection.

• Does not affect any other settings made using the keypad.

Setting Protection Functions Using the Keypad

• Use and under the screen to make fine adjustments of the settings made using the dials.

  The fine adjustments are permanently stored in memory, unless the setting is modified using the dials.

• All the settings not available through the dials are made in the same manner, using the keypad.

Locking Access to Protection Settings

The protection settings are locked when the protective cover is closed to prevent access to the adjustment dials and to disable fine adjustments using the keypad.

If necessary, install a lead seal to protect the settings.

NOTE: If you notice that the pin on the back of the protective cover has been broken off, contact your field service representative to replace the cover.

With the protective cover closed, it is possible to set metering functions and alarms, as well as view all measurements, settings and histories using the keypad.