Legrand 411192 DX3 4P 63 A C-Curve RCBO 30 mA AC

411192: Legrand DX3 4-pole 63 A RCBO, C curve, 30 mA AC type

The Legrand 411192 is a DX3 6000 A four-pole monobloc residual current circuit breaker with overcurrent protection (RCBO). It rates 63 A on a C curve and combines a 30 mA AC-type earth-leakage function with thermal-magnetic short-circuit and overload protection in one 7-module device (124.6 mm). All four poles are protected on a 400 V AC network. Seven Star LLC supplies 411192 in Oman and the GCC as an independent supplier in Muscat.

An RCBO differs from an RCCB because it adds overcurrent protection, so a single device protects one circuit against leakage, overload and short circuit. A leakage fault then trips only that circuit rather than an entire group, which helps with continuity of service in three-phase installations.

Meaning of the 411192 description

Technical specifications for 411192

How the 411192 combines two protections

The overcurrent part is a thermal-magnetic breaker. The thermal element protects the cable from sustained overload, and the magnetic element trips on short circuits between 5 and 10 times 63 A. The residual part uses an electromagnetic relay supplied by a summation current transformer; a leakage above its threshold, nominally 30 mA, trips the same four contacts. A yellow mechanical signaller shows in the front window when the residual function caused the trip, so maintenance staff can tell leakage faults from overload trips at a glance.

The data sheet states a residual breaking capacity of 6000 A and that the four-pole range covers 40, 50 and 63 A, so 411192 is the largest rating. Supply may come from the top through the breaker part, or from the bottom directly to the differential block, which allows flexible wiring.

Where 411192 fits and related RCBOs

A 63 A four-pole RCBO suits submain feeds to a distribution board, a machine panel or a pump station where one trip should isolate a single three-phase circuit. Smaller siblings include 411161 (2-pole, 32 A, AC type) and 411189 (4-pole, 32 A, 4 modules wide) which are better for final circuits. Where the load includes drives or rectifiers, an A or F type device from the same family may be more suitable than the AC type of 411192.

Selection checklist for 411192

• Load current: 63 A, check cable size and the thermal derating of a 7-module device in a closed board.
• Fault level: 6 kA Icn for household rating and 10 kA under IEC 60947-2 at the board.
• Residual type: AC for resistive, lighting and standard motor loads only.
• Sensitivity: 30 mA is for additional protection of people; a higher value gives fire protection only.
• Width: 124.6 mm needs space on the rail; confirm the busbar arrangement.
• Neutral: connected through the device and switched concurrently.

Installation, testing and maintenance of 411192

Fit the device on the rail, connect the supply and loads in accordance with the terminal markings, and use copper conductors within the 1 to 35 mm² range (rigid) or 1 to 25 mm² (flexible). Tighten the terminals to the recommended torque, then close the handle and press the test button to prove that the residual function trips. Record 411192 and the test date on the board schedule. After a trip, check the yellow flag first: if it shows, look for an earth fault before resetting. Retest the function periodically as part of preventive maintenance.

Typical applications in Oman and the GCC

RCBOs of this size are used for three-phase outlets, workshop feeds, small pumps and HVAC units in commercial and industrial sites in Oman and the GCC. Heat inside outdoor kiosks and rooftop panels can approach the 60 °C range, so look at the cabinet temperature and avoid placing a 63 A RCBO next to other high-dissipation devices.

Information to send with an RFQ for 411192

• Reference 411192 and the quantity, including spares for panel maintenance.
• Rated current (63 A), curve (C), poles (4) and residual current sensitivity.
• Residual current type needed (AC, A or F) and the nature of the load.
• Prospective short-circuit current and board layout.
• Delivery location (Muscat, Sohar, Salalah or elsewhere in the GCC) and the date you need the goods.
• Any documents you need with the quotation, such as a technical data sheet or a compliance statement.

Storage, handling and spares for the Legrand 411192

Keep Legrand 411192 units in their original packaging until they are mounted. Store them indoors in a dry, dust-free room, away from direct sun and condensation. Panel shops in Oman and the GCC often hold stock in warehouses that get very hot in summer, so check that storage temperature stays within the limits given in the manufacturer datasheet.

• Check the label and order code on every unit against the drawing before it goes into the panel.
• Use the correct tool and tightening torque for the terminals, as given in the instructions supplied with the product.
• Keep a small number of spare units for each rating used on site, so that a failed or damaged part can be replaced without waiting for a new shipment.
• Record the order code in the panel documentation and the as-built drawings, so that maintenance teams can reorder the same part later.

When you plan spares for a project, group the Legrand 411192 with the other parts of the same panel in one RFQ. This keeps delivery dates aligned and makes it easier to confirm stock for the whole bill of materials at once.

Documents and quotation

The Legrand technical data sheet that covers 411192 is attached on this page. It gives the range table, dimensions, curves and accessories, so check its notes against your design before you order.

To request a quotation, send reference 411192, the quantity and your delivery location. Seven Star LLC is an independent supplier in Muscat and is not affiliated with the manufacturer; we will confirm availability and lead time for your order.