Chassis NII_Z_2: Check IBPO Racking Interlock (MasterPacT MTZ2/MTZ3)

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 characteristics	Description
Action	Check IBPO racking interlock between racking handle and opening pushbutton. Check disconnection and connection of a drawout MasterPacT MTZ2/MTZ3 device when the IBPO racking interlock is installed.
Goal	Verify that the IBPO racking interlock operates correctly and does not allow connection and disconnection of the device without additional action.
Frequency	Refer to Recommended Frequency for the Routine End-User Maintenance Program.
Special indications	–
Necessary tools	Racking handle
Related documents	MasterPacT MTZ2/MTZ3 - IEC Switch-Disconnectors and Circuit Breakers with MicroLogic X Control Unit - User Guide

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	N/A	N/A	N/A
Drawout	Open	Charged	Connected

Step	Action	Corrective action
1	Check that the equipment door is closed.
2	Check that the racking handle cannot be inserted into the racking handle socket.
3	Press and hold the opening pushbutton to allow insertion of the racking handle into the racking handle socket.	If the racking handle cannot be inserted into the racking handle socket: Open the equipment door. Check if the VPOC racking interlock option is present. Remove the VPOC racking interlock, if necessary. If the problem persists, contact your Schneider Electric Services representative.
4	Rack-out the device from connected to test position. When the test position is reached, the mechanism blocks the racking handle and the position release button pops out. NOTE: If needed, refer to device racking operations as per procedure Chassis NII_Z_1.
5	Remove the racking handle from the racking handle socket.

Step	Action	Corrective action
1	Check that the racking handle cannot be inserted into the racking handle socket.
2	Press and hold the opening pushbutton to allow insertion of the racking handle into the racking handle socket.
3	Rack-in the device from test to connected position. When the connected position is reached, the mechanism blocks the racking handle and the position release button pops out. NOTE: If needed, refer to device racking operations as per procedure Chassis NII_Z_1.
4	Remove the racking handle from the racking handle socket, and then put it back into its storage space.
5	Reinstall the VPOC racking interlock if removed previously.