AMS/MMS Test

The AMS and MMS tests are legacy methods of testing the arc energy reduction feature performance in compliance with NEC 240.87 (c) requirements.

You can perform the AMS or MMS tests on the communicating MicroLogic P and H trip units and MicroLogic 5.0 A, 6.0 A or 7.0 A trip units, irrespective of the firmware version.

Activating the AMS Mode

The AMS mode is controlled by the AMS switch.

Before running the AMS test, you must activate the AMS mode by turning the AMS switch to the ON position. The indicator light in the AMS switch and the maintenance mode indicator light near the circuit breaker must be in the ON state.

For more information, refer to Alternate Maintenance Setting (AMS) Switch – Instruction Sheet.

Activating the MMS Mode

The MMS mode is controlled by the MMS switch.

Before running the MMS test, you must activate the MMS mode by turning the MMS switch to the ON position. The indicator light in the MMS switch must be in the ON state.

For more information, refer to Maintenance Mode Switch (MMS) – Instruction Sheet.