MT100/160 Motor Mechanism 220-240V 50/60HZ 208-277V 60Hz

The Schneider Electric LV429434 MT100/160 motor mechanism is an accessory designed to automate the operation of ComPacT NSX100 and NSX160 circuit breakers. It enables the electrical opening and closing of the breaker and automatic charging of the stored-energy mechanism, making remote control and automation of distribution switchboards easier.

This version operates with a control voltage of 220-240 V AC at 50/60 Hz or 208-277 V AC at 60 Hz. The mechanism is also supplied with an SDE adapter and keeps the breaker’s manual indications and functions accessible once installed.

Motor mechanism for ComPacT NSX100 and NSX160

The Schneider Electric LV429434 belongs to the MT100/160 family developed for ComPacT NSX molded case circuit breakers.

Its function is to motorize the breaker mechanism so that certain operations can be carried out by electrical commands, without the need to manually operate the front handle for each maneuver.

It is especially suitable for distribution boards where the following are required:

• Electrical opening of the breaker.
• Electrical closing of the breaker.
• Automatic charging of the stored-energy mechanism.
• Remote operation.
• Integration into automation systems.
• Resetting and service restoration according to the installed control logic.

220-240 V AC supply voltage

The LV429434 reference is designed to use a control supply of:

• 220-240 V AC at 50/60 Hz.
• 208-277 V AC at 60 Hz.

This feature must be taken into account when selecting the mechanism, as Schneider Electric offers other MT100/160 versions intended for different control voltages.

Before installation, it must be checked that the voltage available in the control circuit exactly matches the range allowed by this reference.

Remote opening and closing of the breaker

The motorization allows the circuit breaker to be operated from an external control circuit. In this way, the ComPacT NSX can be integrated into switchboards where opening and closing must be performed from another point in the installation or by an automatic system.

The mechanism accepts pulse and maintained control signals, providing flexibility for integration with different control schemes.

This functionality is especially useful in installations with transfer systems, automated switchboards, supervised electrical distribution, and applications where direct access to the breaker is not the usual operating method.

Automatic charging of the mechanism

One of the main functions of the MT100/160 is the automatic charging of the breaker’s stored-energy mechanism. This operation prepares the device for a new electrical closing operation.

Thanks to the motor drive, the process is carried out automatically and keeps the breaker ready for subsequent operating commands within the logic defined by the installation.

Fast opening and closing response

According to the technical data associated with this reference, the mechanism has short response times:

• Opening time: less than 600 ms.
• Closing time: less than 80 ms.

These values allow automated operations to be performed quickly in electrical switchboards where the breaker status must be controlled by external signals.

Up to 4 operating cycles per minute

Schneider Electric specifies a maximum operating frequency of 4 operations per minute for the mechanism.

This limit must be respected when designing the automation logic to avoid subjecting the motorized system to a higher operating frequency than that intended by the manufacturer.

Consumption during operation

The motor mechanism has a maximum consumption of 500 VA during opening and closing operations.

This data must be considered when sizing the auxiliary supply circuit, protection devices, and any transformer or power supply used to feed the control system.

SDE adapter included

The LV429434 reference is supplied with an SDE adapter. This adapter allows the tripping indication associated with the breaker status to be integrated into the corresponding configuration of the motor mechanism.

The SDE contact or signal is used in ComPacT systems to identify that the breaker has opened as a result of a protection trip, making it easier to use within monitoring and automation schemes.

Manual operation is retained

Adding the motor mechanism does not eliminate the possibility of carrying out certain operations directly from the front of the breaker.

Schneider Electric designs the assembly to keep the device indications visible and accessible and to facilitate manual operation when usage conditions allow it.

This combination of electrical control and local operation provides greater flexibility during commissioning, maintenance, or operation of the switchboard.

Padlocking in the OFF position

The mechanism retains the possibility of locking the breaker with a padlock in the OFF position. This function is useful during certain maintenance, intervention, or circuit isolation operations.

The mechanical lock helps prevent an undesired closing operation while the breaker is isolating the circuit, always within the safety procedure established for the installation.

Front double insulation

The mechanism is designed to provide double insulation at the front and keep the main breaker indications visible.

This construction allows the accessory to be integrated while maintaining the operating and signaling functions needed for everyday use of the electrical switchboard.

Fixed mounting

The LV429434 reference is specified for a fixed mounting configuration. It must be installed on a compatible ComPacT breaker following Schneider Electric’s mounting instructions.

Before carrying out any work, both the breaker reference and the frame size and available auxiliary voltage must be verified.

Applications of the LV429434 motor mechanism

Electrical operation of a circuit breaker is especially useful in switchboards where remote or automated control of power distribution is required.

Typical applications include:

• Main low-voltage switchboards.
• Industrial distribution boards.
• Energy management systems.
• Commercial and tertiary installations.
• Process centers and technical rooms.
• Installations with remote breaker control.
• Distribution network automation.
• Transfer and switching systems configured with the corresponding accessories.
• Installations with breaker status monitoring.

Integration into automated switchboards

The main advantage of installing a motor mechanism on a circuit breaker is the ability to incorporate its operation into an external control logic.

Depending on the accessories and the switchboard design, commands may come from pushbuttons, relays, automation systems, controllers, or compatible monitoring solutions.

This makes it possible to execute automatic sequences and manage the breaker without needing to perform each operation directly from the front of the switchboard.

Technical characteristics of the Schneider Electric LV429434

• Brand: Schneider Electric.
• Reference: LV429434.
• Range: ComPacT NSX.
• Model: MT100/160.
• Product type: motor mechanism for circuit breaker.
• Application: automatic charging of the mechanism and electrical operation of the breaker.
• Main compatibility: ComPacT NSX100 and NSX160.
• Control voltage: 220-240 V AC at 50/60 Hz.
• Alternative control voltage: 208-277 V AC at 60 Hz.
• Control type: standard.
• Control signal type: pulse or maintained.
• Mounting: fixed.
• Opening time: less than 600 ms.
• Closing time: less than 80 ms.
• Maximum operating frequency: 4 operations per minute.
• Consumption during opening: maximum 500 VA.
• Consumption during closing: maximum 500 VA.
• SDE adapter: included.
• Locking: padlock possible in OFF position.
• Manual operation: available.
• Front insulation: double insulation.
• EAN: 3606480020001.

Automation of ComPacT NSX circuit breakers

The Schneider Electric LV429434 turns a compatible ComPacT NSX circuit breaker into a device ready to perform electrical operations from a control circuit. In this way, the switchboard can incorporate remote opening and closing functions without giving up manual operation and the front indications of the breaker.

Its 220-240 V AC 50/60 Hz supply, fast operating times, the possibility of using pulse or maintained commands, and the included SDE adapter make integration into professional electrical installations easier.

Original Schneider Electric accessory for remote operation

The MT100/160 LV429434 motor mechanism is an original Schneider Electric solution designed to expand the functions of ComPacT NSX100/160 circuit breakers. Its main purpose is to automate mechanism charging and provide safe electrical opening and closing within the installation’s control logic.

Important: this product is a motorization accessory and not a complete circuit breaker. For proper operation, it must be installed on a compatible Schneider Electric breaker. Before purchasing or installing, it is necessary to verify the exact breaker reference, frame size, configuration, and the voltage available in the control circuit.