WEG MPW-25-3-D006 Motor Protection Circuit Breaker

The WEG MPW-25-3-D006 is a three-pole motor protection circuit breaker designed for direct-on-line motor starters in industrial environments across Saudi Arabia, the Gulf, and wider MENA region. Rated for currents from 0.4 A to 0.6 A, this compact device integrates thermal-magnetic trip technology to deliver reliable overload and short-circuit protection for small three-phase motors up to 25 A frame size.

IEC 60947-4 and Saudi Industrial Compliance

The MPW-25-3-D006 complies fully with IEC 60947-4-1, the international standard for low-voltage switchgear and controlgear assemblies covering AC motor starters. This compliance is essential for projects governed by Saudi Aramco Engineering Standards (SAES) and SABIC procurement specifications, which mandate IEC-certified protection devices in motor control centres (MCCs). The device is tested and approved for use in hazardous-area adjacent panels and standard industrial MCC assemblies throughout Saudi industrial cities including Jubail Industrial City, Yanbu Industrial City, Jeddah, and Dammam.

Thermal-Magnetic Trip Technology

The built-in thermal element provides time-delayed overload protection, responding to sustained overcurrents that cause motor winding overheating. The magnetic element provides instantaneous short-circuit interruption. Together, these mechanisms protect motor windings, cables, and downstream contactors from damage. The adjustable trip current range (0.4–0.6 A) allows site engineers to calibrate protection precisely to the full-load current (FLC) nameplate value of the connected motor, eliminating the need for separate overload relays in compact starter assemblies.

Construction and Mounting

The MPW series features a compact DIN-rail mountable body with padlockable handle for lockout-tagout (LOTO) procedures, a mandatory requirement under Saudi Aramco GI 2.100 and international safety standards. The device includes auxiliary contact ports for remote signalling to SCADA systems and DCS panels used in Saudi petrochemical and water utility plants. Front-face terminals accept standard copper conductors and allow tool-free wire insertion in certain configurations.

Motor Control Centre Integration

In Saudi industrial practice, MPW devices are combined with WEG CWM series contactors to form complete DOL starter assemblies. The MPW-25-3-D006 pairs with CWM09 through CWM25 contactors for motors in the 0.06 kW to 0.18 kW range. These assemblies are supplied pre-wired on DIN rails inside MCC cubicles, reducing on-site installation time and error. Razz Middle East supplies complete pre-wired WEG MCC assemblies to EPC contractors and end users in the Saudi industrial sector.

Applications in Saudi Arabia

Typical applications include HVAC fan motors in commercial and industrial buildings, small conveyor drives in warehouse and logistics facilities, pump starter panels in water and wastewater treatment plants, and auxiliary motor starters in oil and gas processing facilities. The compact frame makes the MPW-25-3-D006 ideal for multi-motor panels where space is constrained. Saudi Aramco approved vendor lists include WEG as a qualified supplier of motor protection devices for both onshore and offshore facilities.

Specifications and Operating Conditions

The device operates across an ambient temperature range of -25°C to +55°C, suitable for both air-conditioned electrical rooms and outdoor weatherproof enclosures common in Saudi industrial sites where ambient temperatures can exceed 45°C in summer. Humidity tolerance up to 95% non-condensing ensures reliable operation in coastal industrial zones such as Jubail and Yanbu. The 25 A frame size accommodates future uprating within the same MCC cubicle, providing design flexibility for plant expansions.

Razz Middle East Supply and Support

Razz Middle East maintains WEG MPW series inventory in Saudi Arabia for fast delivery to Aramco, SABIC, and SEC projects. Our technical team provides selection guidance, MCC assembly design, and on-site commissioning support. All WEG products supplied by Razz include manufacturer certificates of conformity and test reports as required by Saudi procurement standards.