Conditions for Engaging the ERMS Function

The Energy Reducing Maintenance Setting (ERMS) function is available when the Energy Reducing Maintenance Settings Digital Module is purchased and installed on the Micrologic X control unit.

Energy Reducing Maintenance Setting (ERMS) Function Operating Principles

The ERMS function can be engaged as follows:

With the Masterpact MTZ Mobile App (password-protected).
There is a digital lock between a smartphone running the Masterpact MTZ Mobile App and the Micrologic X control unit.
By using an external selector switch connected to the optional ERMS switch module (ESM).
The ESM module is installed in the circuit breaker and is connected to an external selector switch, which can be padlocked. The ERMS function is engaged by turning the external selector switch.

The ERMS function can be engaged with both the Masterpact MTZ Mobile App (password-protected) and an external selector switch.

The ERMS function must be disengaged by the interface that engaged it:

If it is engaged on a smartphone, it must be disengaged by the same smartphone.
If it is engaged by the external ERMS switch connected to the ESM module, it must be disengaged by the ERMS switch.
If it is engaged by both a smartphone and the ERMS switch, it must be disengaged by both that smartphone and the ERMS switch.

While the ERMS function is engaged:

A blue ERMS LED (A) is lit on the front face of the Micrologic X control unit.
Quick View scrolling is interrupted and the ERMS engaged message is displayed with a blue backlight.
All screens, except pop-up messages, are displayed with a blue backlight.

For more information, refer to the Micrologic X - Control Unit - User Guide (see Related Documents).

Engaging the ERMS Function

NOTICE
HAZARD OF LOSS OF POWER Confirm that the Energy Reducing Maintenance Setting (ERMS) protection settings are properly configured prior to engagement. Failure to follow these instructions can result in loss of service due to power loss.

The ERMS can be engaged in different ways, according to the device configuration and its accessories:

Type	Accessories	Action
Through Masterpact MTZ Mobile App	—	Send a command from the Masterpact MTZ Mobile App to engage the ERMS function, through Bluetooth wireless communication or USB OTG connection. The action is password-protected.
Through an external selector switch connected to the ESM module	ERMS switch module (ESM) External selector switch	Turn the external selector switch to the Engaged position

Disengaging the Energy Reducing Maintenance Setting (ERMS) Function

DANGER
HAZARD OF ELECTRICAL SHOCK, EXPLOSION, OR ARC FLASH Prior to disengaging the Energy Reducing Maintenance Setting (ERMS) function: Carefully inspect your work area, and remove any tools and objects left inside the equipment. Ensure that all personnel are away from the equipment, and devices, doors, and covers are in place. Failure to follow these instructions will result in death or serious injury.

DANGER

HAZARD OF ELECTRICAL SHOCK, EXPLOSION, OR ARC FLASH

Prior to disengaging the Energy Reducing Maintenance Setting (ERMS) function:

Carefully inspect your work area, and remove any tools and objects left inside the equipment.
Ensure that all personnel are away from the equipment, and devices, doors, and covers are in place.

Failure to follow these instructions will result in death or serious injury.

A digital lock function establishes a digital lock between a smartphone running the Masterpact MTZ Mobile App and the Micrologic X control unit when ERMS is engaged by the smartphone. The digital lock function ensures that when the ERMS function is engaged by a smartphone, it must be disengaged by the same smartphone.

The way to disengage the ERMS function depends on how it was engaged:

Type	Accessories	Action
Through Masterpact MTZ Mobile App	—	Disengage the ERMS function on the same smartphone that engaged it
Through an external selector switch	ERMS switch module (ESM) External selector switch	Turn the external selector switch to the Disengaged position
Through Masterpact MTZ Mobile App and an external selector switch	ERMS switch module (ESM) External selector switch	Disengage the ERMS function on the same smartphone that engaged it Turn the external selector switch to the Disengaged position