Opening Function

Presentation

MicroLogic Active control units receive and process electrical opening orders. An event is generated on opening.

Operating Principle

Opening orders can be sent as follows:

Directly through a mechanical opening pushbutton.
Locally through an external opening pushbutton.
Remotely through a remote order which is managed by the MicroLogic Active control unit.

Opening orders have priority over closing orders. No closing orders are taken into account as long as an open order is active.

The open orders on MN or MX voltage releases by external pushbutton can be maintained to force the circuit breaker in open position and reject any close order. The MicroLogic Active open orders are not maintained.

Management of Opening Function

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Do not operate the circuit breaker without confirming that doing so will not create a hazardous situation. Do not use MicroLogic Active remote control functions in a safety chain. Do not allow any person to work on the electrical network without physically validating the successful execution of the local or remote software actions for opening the circuit breaker or switching off the electrical circuit. Failure to follow these instructions will result in death or serious injury.

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

Do not operate the circuit breaker without confirming that doing so will not create a hazardous situation.
Do not use MicroLogic Active remote control functions in a safety chain.
Do not allow any person to work on the electrical network without physically validating the successful execution of the local or remote software actions for opening the circuit breaker or switching off the electrical circuit.

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

The MicroLogic Active control unit manages opening orders issued by the following means:

Server or remote controller connected to the communication network through Modbus protocol. For information about communication through Modbus protocol, refer to DOCA0384•• MasterPacT, ComPacT, PowerPacT Circuit Breakers - Modbus Communication - User Guide.
IFE/EIFE webpages. Refer to the relevant document:
- DOCA0106•• Enerlin'X EIFE - Embedded Ethernet Interface for One MasterPacT MTZ Drawout Circuit Breaker - User Guide
- DOCA0142•• Enerlin'X IFE - Ethernet Interface for One Circuit Breaker - User Guide
- DOCA0084•• Enerlin'X IFE - Ethernet Switchboard Server - User Guide
FDM121 display connected to the ULP system. Refer to DOCA0088•• Enerlin'X FDM121 - Front Display Module for One Circuit Breaker - User Guide.

The control logic for managing opening orders is summarized in the following graphic and table:

CB closed	Circuit breaker is closed
MX control by BCIM enabled	Control of the MX voltage release by the BCIM module is enabled.
Auto Local	Control mode is Auto Local
FDM121 open	Open order from FDM121 display
Auto Remote	Control mode is Auto Remote
COM open	Open order from a server or remote controller
Webpage open	Open order from IFE/EIFE webpage
Open	MicroLogic Active open order to the MX communicating opening voltage release

Predefined Events

The function generates the following predefined events:

Code	Event	History	Severity
0x1000 (4096)	Circuit breaker opened	Operation	Low
0x0410 (1040)	Opening order sent to MX voltage release	Operation	Low