Restricting Local Access to the MasterPacT, ComPacT, and PowerPacT Circuit Breaker

Overview

The MasterPacT, ComPacT, and PowerPacT intelligent modular unit (IMU) offers both local and remote access possibilities. You must ensure that only authorized users are granted access.

Local Access to MasterPacT, ComPacT, and PowerPacT Circuit Breaker

Local access to the MasterPacT, ComPacT, and PowerPacT intelligent modular unit provides various possibilities for accessing information about the system and controlling it.

Therefore, it is important to restrict local access to the MasterPacT, ComPacT, and PowerPacT circuit breaker by installing it in a locked area to avoid:

• Unauthorized access to the MicroLogic HMI with the risk of changes to settings from the HMI

• Unauthorized access to wireless Bluetooth communication with the risk of changes to settings from EcoStruxure Power Device app

• Unauthorized access to wireless NFC communication with the risk of data disclosure

• Unauthorized connection through the USB port on the MicroLogic control unit with the risk of changes to settings from EcoStruxure Power Commission software or smartphone with EcoStruxure Power Device app

• Unauthorized connection through the test port on the MicroLogic trip unit with the risk of changes to settings from EcoStruxure Power Commission software using the Service Interface or USB Maintenance Interface

• Unauthorized access to the IO module with the risk of changes to the switch setting for the predefined application in use

It is also important to implement rules for managing access to the locked area. In particular, you must ensure that:

• The area is kept locked at all times.

• The area is equipped with an authentication and authorization system.

• Only authorized personnel have a key or access code.

• The communication network cables entering the room and the connection ports on communicating devices outside the room are protected.

• All devices such as PCs, smartphones, and tablets that access the MicroLogic trip unit or control unit are hardened following the latest vendor guidelines.

When the MasterPacT, ComPacT, and PowerPacT circuit breaker is installed in a locked area, you must implement an emergency opening process. For example:

• Equip that area with at least one emergency stop button accessible from outside

• Equip the circuit breaker with an MN undervoltage release (failsafe system)