Opening the Device

To open the device, the device must be closed (I).

NOTE: An opening order always takes priority over a closing order.

The following tables present the different ways to open the device.

Opening type	Accessories	Opening action
Mechanical	–	Press the opening pushbutton on the front of the device. This opening action is possible at any time.
Automatic	MN undervoltage release, with or without MN delay unit	The MN undervoltage release opens the device automatically in the case of voltage drop.
By external pushbutton	External pushbutton wired by customer One of the following accessories: MX standard opening voltage release MN undervoltage release, with or without MN delay unit	Press the external pushbutton which is connected to the MX opening voltage release or to the MN undervoltage release via the customer terminal block. When the MN undervoltage release is connected to the MN delay unit, the device opens with the corresponding time delay.

Opening type

Accessories

Opening action

Mechanical

–

Press the opening pushbutton on the front of the device.

This opening action is possible at any time.

Automatic

MN undervoltage release, with or without MN delay unit

The MN undervoltage release opens the device automatically in the case of voltage drop.

By external pushbutton

External pushbutton wired by customer
One of the following accessories:
- MX standard opening voltage release
- MN undervoltage release, with or without MN delay unit

Press the external pushbutton which is connected to the MX opening voltage release or to the MN undervoltage release via the customer terminal block.

When the MN undervoltage release is connected to the MN delay unit, the device opens with the corresponding time delay.