Schneider Electric LV430631 ComPact NSX160F 125 A Circuit

LV430631 a 125 A ComPact NSX160F thermal-magnetic breaker

The LV430631 is a Schneider Electric product listed in the datasheet as: Circuit breaker, ComPact NSX160F, 36kA/415VAC, TMD trip unit 125A, 3 poles 3d. The LV430631 is a ComPact NSX160F with a 125 A TM-D thermal-magnetic trip unit, three poles and 36 kA breaking capacity at 415 V. The frame is larger than the current, so there is room for growth if the trip unit is later changed within the same frame. Seven Star LLC supplies the LV430631 in Oman and the GCC as an independent supplier based in Muscat.

Decoding the reference: NSX160F is the 160 A frame with performance level F, TMD indicates the thermal-magnetic trip unit, and 125 A is the trip rating at 40 degrees Celsius. This differs from the 250 A unit LV431630, which sits on the 250 A frame.

Technical specifications of the LV430631

Ratings and endurance of the LV430631

Network frequency: 50/60 Hz. Rated operational voltage: 690 V AC 50/60 Hz. Utilisation categories: Category A. Trip unit technology: Thermal-magnetic. Breaking capacity: 36 kA 380/415 V AC 50/60 Hz IEC 60947-2; 85 kA 220/240 V AC 50/60 Hz IEC 60947-2; 22 kA 525 V AC 50/60 Hz IEC 60947-2. Mechanical durability: 40000 cycles. Electrical durability: 7500 cycles 690 V In; 15000 cycles 690 V In/2; 20000 cycles 440 V In; 40000 cycles 440 V In/2.

Voltage ratings are the same as the larger frame: 690 V AC operational, 800 V insulation and 8 kV impulse, with 36 kA at 380/415 V and 85 kA at 220/240 V. Where the datasheet lists a UL value it is 10 kA at 600 V AC, which is different from the IEC figure, so use the correct standard for the project.

Endurance is better than the 250 A unit: mechanical durability is 40000 cycles and electrical durability is 7500 cycles at 690 V In, with higher values at lower voltages. That suits feeders that are switched regularly.

Selecting between 125 A and 250 A NSX breakers

The two references use identical TM-D logic. The main differences are the frame size, the number of operations, and the available trip unit currents. If a board is designed around 125 A feeders, the LV430631 saves cost and space compared with the LV431630.

For motor circuits the NSX with thermal-magnetic protection is not the best match; a magnetic-only or electronic trip unit is typical. This breaker is meant for cables and distribution.

The datasheet downloaded for this page carries lifecycle notices: Discontinued on: Jun 15, 2023. For a plant that already runs this reference that makes the LV430631 a spare-and-replacement item, and it is worth fixing the stock level and the long-term successor plan at the same time. We can discuss compatible alternatives once we know the installation.

Selection checklist for the LV430631

• Rating: 125 A at 40 degrees Celsius.
• Frame: NSX160, three poles protected.
• Breaking: 36 kA at 415 V, F level.
• Trip: TM-D, long-time 0.7 to 1 x In.
• Connection: front, 35 mm pitch, backplate fixing.
• Lifecycle: discontinued; confirm whether an identical spare is required.

Maintenance of the LV430631

Retorque terminals after the first weeks of operation, because cable relaxation can raise contact temperature. A thermal camera survey of the board identifies loose connections before they cause a trip.

Keep a label with the breaker rating and the protected circuit. When the breaker has interrupted a fault, inspect it per the manual and replace if the contacts or case are damaged.

Typical applications of the LV430631 in Oman and the GCC

In Oman and the GCC, the 125 A rating is common on sub-distribution feeders, air handling units, pump panels and workshop supplies. Because many boards are 10 to 20 years old, the NSX is often replaced like for like to avoid redesigning the busbar.

Dimensions, environment and approvals of the LV430631

For the LV430631, plan the mounting space from the datasheet: 105 mm (W) x 161 mm (H) x 86 mm (D). The LV430631 weighs 2.2 kg. Mounting, derating and enclosure choices follow the environmental data below, which should be compared with the actual panel temperature and the dust and humidity of the site in Oman and the GCC.

Ambient temperature limits in the datasheet: -50 to 85 °C. Relative humidity: 0 to 95 %. Ingress protection: IP40 conforming to IEC 60529. Operating altitude: 0 to 2000 m without derating; 2000 m–5000 m with derating. Standards listed: EN/IEC 60947. Certifications listed for this reference: CCC; EAC; Marine.

Information to send with an RFQ for the LV430631

• Full reference and quantity required
• Existing equipment, panel or rack it must fit
• Supply voltage, load or signal details of the application
• Required delivery location and timing
• Whether a spare, a replacement or a new installation

Documents and quotation

A datasheet for this product is attached on this page. It lists the electrical, mechanical and environmental data summarised above.

Send us the part number, quantity and application and we will confirm availability and a quotation. Seven Star LLC is an independent supplier in Muscat and does not represent itself as an official channel of the manufacturer.