Schneider Electric Compact NSX MX Shunt Trip - LV429387

Name: Schneider Electric Compact NSX MX Shunt Trip - LV429387
Brand: Schneider Electric
SKU: 4zoukpkagf
Availability: InStock

The Schneider Electric MX shunt trip release is designed for use with Compact NSX, PowerPact Multi...

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Product Information

Full details

The Schneider Electric Compact NSX MX Shunt Trip (LV429387) is designed for electrical engineers and facility managers who require reliable remote tripping capabilities for their distribution systems. This accessory provides the critical function of opening a circuit breaker via a remote signal, offering enhanced safety and control for industrial environments. Users should note that each breaker is strictly limited to one MX or MN auxiliary installation, which requires careful planning during initial panel configuration.

All features

Series	Compact NSX
Model Part Number	LV429387
Brand	Schneider Electric

Extended Product Information

FAQs

What is the primary function of the LV429387?

It is a shunt trip accessory that allows the remote opening of a circuit breaker when an external electrical signal is provided.

Can I install an MX shunt trip and an MN undervoltage trip on the same breaker?

No. The circuit breaker supports only one MX or MN auxiliary per device.

Does this device require a specific voltage?

It is rated for 220-240V AC 50/60 Hz or 208-277V AC 60 Hz.

Which circuit breakers are compatible with this accessory?

It is compatible with Compact NSX, PowerPact Multistandard, and EasyPact CVS circuit breakers.

What is the threshold for the shunt trip to trigger?

The trip is designed to activate when the control voltage reaches or exceeds 70% of the nominal voltage.

Is this product UL certified?

Yes, the LV429387 is UL Listed and CSA certified.

Troubleshooting

Breaker fails to trip when signal is sent

Verify that the control voltage is at least 70% of the nominal value (Un) and check that the wiring connection to the auxiliary is secure.

Cannot install the auxiliary into the breaker

Confirm that there is no other MN or MX auxiliary already installed, as the device only supports one of these components per breaker.

Intermittent tripping

Check for voltage drops on the control line; if the voltage dips below the 70% threshold during operation, the trip may not trigger consistently.

Pros and Cons

Pros

High reliability in remote safety shutdowns
Global certifications ensure compatibility with international standards
Broad AC voltage range covers standard and industrial applications
Robust build quality typical of Schneider Electric components

Cons

Strict limit of one MX or MN auxiliary per device
Requires professional electrical knowledge for safe installation
Cannot be used simultaneously with an MN (undervoltage) trip on the same slot

Setup, Compatibility & Care

Installation must be performed by a qualified electrician in accordance with local electrical codes. First, ensure the circuit breaker is in the 'OFF' or 'Trip' position before attempting to install the auxiliary. The unit snaps into the designated auxiliary cavity on the Compact NSX/EasyPact CVS frame. Remember that only one MX or MN auxiliary is permitted per breaker. To care for the unit, keep the control circuit wiring free of moisture and debris. Periodically check the tightness of the control wire terminals to prevent connection heating, though the device itself is maintenance-free.