Control Unit NII_Z_3: Check Operation of Energy Reduction Maintenance Settings (ERMS)

Safety Instructions

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, CSA Z462, NOM 029-STPS, or local equivalent. This equipment must only be installed and serviced by qualified electrical personnel. Unless specified otherwise in the maintenance procedures, all operations (inspection, test, and preventive maintenance) must be carried out with the device, the chassis, and the auxiliary circuits de-energized. Check that the device and the chassis are de-energized on the upstream and downstream terminals. Always use a properly rated voltage sensing device to confirm that the device, the chassis, and the auxiliary circuits are de-energized. Install safety barriers and display a danger sign. During the tests, it is strictly forbidden for anyone to touch the device, the chassis, or the conductors while voltage is applied. Before turning on power to this equipment, check that all connections are made with the correct tightening torque and the device is open (OFF position). Before turning on power to this equipment, put all devices, doors, and covers back in place. Before turning on power to this equipment, beware of potential hazards and carefully inspect the work area for tools and objects that may have been left inside the equipment. Failure to follow these instructions will result in death or serious injury.

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, CSA Z462, NOM 029-STPS, or local equivalent.
This equipment must only be installed and serviced by qualified electrical personnel.
Unless specified otherwise in the maintenance procedures, all operations (inspection, test, and preventive maintenance) must be carried out with the device, the chassis, and the auxiliary circuits de-energized.
Check that the device and the chassis are de-energized on the upstream and downstream terminals.
Always use a properly rated voltage sensing device to confirm that the device, the chassis, and the auxiliary circuits are de-energized.
Install safety barriers and display a danger sign.
During the tests, it is strictly forbidden for anyone to touch the device, the chassis, or the conductors while voltage is applied.
Before turning on power to this equipment, check that all connections are made with the correct tightening torque and the device is open (OFF position).
Before turning on power to this equipment, put all devices, doors, and covers back in place.
Before turning on power to this equipment, beware of potential hazards and carefully inspect the work area for tools and objects that may have been left inside the equipment.

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

Procedure Definition

Procedure characteristics	Description
Action	Check engagement of the ERMS function by smartphone. Test the ERMS tripping curve. Check engagement of the ERMS function by external selector switch.
Goal	Verify that the ERMS function is operational when engaged.
Frequency	Refer to Recommended Frequency for the Routine End-User Maintenance Program.
Special indications	–
Necessary tools	A PC running EcoStruxure Power Commission software. A USB cable (standard to mini USB port). A smartphone running the EcoStruxure Power Device app.
Related documents	MasterPacT MTZ1 - IEC Switch-Disconnectors and Circuit Breakers with MicroLogic X Control Unit - User Guide MasterPacT MTZ2/MTZ3 - IEC Switch-Disconnectors and Circuit Breakers with MicroLogic X Control Unit - User Guide MasterPacT MTZ - MicroLogic X Control Unit - User Guide EcoStruxure Power Commission Online Help

Preliminary Conditions

The device must comply with the conditions specified below. Refer to the MasterPacT MTZ User Guides to find instructions for operating the device.

Device installation type	Position of poles	Mechanism	Device position in the chassis
Fixed	Closed	Discharged	N/A
Drawout	Closed	Discharged	Test

Checking Engagement of ERMS by Smartphone

Step	Action	Corrective action
1	Connect a smartphone to the control unit through a Bluetooth Low Energy connection and open the EcoStruxure Power Device app.
2	Engage the ERMS function from the smartphone.
3	On the MicroLogic X control unit, check that: The ERMS LED is lit blue. The screen is lit with a blue backlight. The message ERMS engaged: Smartphone is displayed in Quick View > Trip Curve. NOTE: An active medium or high severity event message overrides the blue backlight and is displayed with an orange or a red backlight. Click OK to acknowledge. The screen is once again lit with a blue backlight while ERMS is engaged.	If the backlight is not lit blue: Check the power supply connections to the control unit. If the connection if OK, replace the MicroLogic X display screen (refer to MicroLogic X - Embedded Display - Instruction Sheet) If the ERMS LED is not lit blue, contact your Schneider Electric Services representative. If the message ERMS engaged: Smartphone is not displayed in Quick View > Trip Curve, contact your Schneider Electric Services representative.

Step

Action

Corrective action

Connect a smartphone to the control unit through a Bluetooth Low Energy connection and open the EcoStruxure Power Device app.

Engage the ERMS function from the smartphone.

On the MicroLogic X control unit, check that:

The ERMS LED is lit blue.
The screen is lit with a blue backlight.
The message ERMS engaged: Smartphone is displayed in Quick View > Trip Curve.

NOTE: An active medium or high severity event message overrides the blue backlight and is displayed with an orange or a red backlight. Click OK to acknowledge. The screen is once again lit with a blue backlight while ERMS is engaged.

If the backlight is not lit blue:
1. Check the power supply connections to the control unit.
2. If the connection if OK, replace the MicroLogic X display screen (refer to MicroLogic X - Embedded Display - Instruction Sheet)
If the ERMS LED is not lit blue, contact your Schneider Electric Services representative.
If the message ERMS engaged: Smartphone is not displayed in Quick View > Trip Curve, contact your Schneider Electric Services representative.

Testing the ERMS Tripping Curve

Step	Action	Corrective action
1	Connect a PC running EcoStruxure Power Commission software to the MicroLogic X control unit. A Cable plug connected to the mini USB port of MicroLogic X control unit B Standard to mini USB port cable C PC running EcoStruxure Power Commission software
2	Launch EcoStruxure Power Commission software.
3	Click Connect Device Directly. Result: A window displays to indicate that the device discovery is in progress. It disappears automatically when the device is discovered.
4	Click NEXT to close the Project Information window.
5	Click SAVE to close the Customer Details window and display the SWITCHBOARD VIEW.
6	Click the Connect to device button.
7	Click View trip curve.
8	In EcoStruxure Power Commission software, check that the active trip curve is ERMS.	If the active trip curve does not refresh automatically, close the Active trip curve window with the cross on the right and reopen it.
9	Launch a trip test sequence on the ERMS settings. Result: The protection trips on the ERMS settings.	If the trip test fails, contact your Schneider Electric Services representative.
10	Disengage ERMS from the smartphone.
11	In EcoStruxure Power Commission software, check that the active trip curve is Set A or Set B.	If the active trip curve does not refresh automatically, close the Active trip curve window with the cross on the right and reopen it.
12	On the MicroLogic X control unit, check that: The ERMS LED is off. The blue backlight is off. The message ERMS engaged: Smartphone is not displayed in Quick View > Trip Curve.

Checking Engagement of ERMS by External Selector Switch

Step	Action	Corrective Action
1	Engage ERMS by turning the external selector switch.
2	On the MicroLogic X control unit, check that: The ERMS LED is lit blue. The screen is lit with a blue backlight. The message ERMS engaged: Switch (ERMS) is displayed in Quick View > Trip Curve.	If the backlight is not lit blue: Check the power supply connections to the control unit. If the connection if OK, replace the MicroLogic X display screen (refer to MicroLogic X - Embedded Display - Instruction Sheet) If the ERMS LED is not lit blue, contact your Schneider Electric Services representative. If the message ERMS engaged: Switch (ERMS) is not displayed in Quick View > Trip Curve, contact your Schneider Electric Services representative. If the switch does not engage the ERMS function, contact your Schneider Electric Services representative.
3	Disengage ERMS by turning the external selector switch.
4	In EcoStruxure Power Commission software, check that the active trip curve is Set A or Set B in View trip curve > Active trip curve.
5	Exit EcoStruxure Power Commission software.