WEG MPW-25-3-D008 Motor Protection Circuit Breaker

The WEG MPW-25-3-D008 is a three-pole motor protection circuit breaker with a current range of 0.6 A to 0.8 A, part of the MPW-25 frame series designed for compact motor control centre (MCC) installations in Saudi Arabian industrial facilities. The device integrates thermal-magnetic trip technology delivering simultaneous overload protection and short-circuit interruption without requiring an additional overload relay, reducing panel footprint and wiring complexity in motor starter assemblies used by Aramco, SABIC, SEC, and SEC-affiliated contractors across the Kingdom.

Technical Design and Protection Principles

The thermal element of the MPW-25-3-D008 responds to sustained overcurrents through a bimetallic strip mechanism, providing time-inverse tripping characteristics that closely follow motor thermal limits. The magnetic element provides instantaneous trip on short-circuit currents, preventing damage to motor windings, supply cables, and contactor contacts. The trip class (Class 10) suits standard industrial motors with normal starting characteristics, while the compact 25 A frame ensures the device fits within tight MCC cubicle layouts common in Saudi petrochemical and water treatment plants.

IEC and Saudi Standards Compliance

Full compliance with IEC 60947-4-1 and IEC 60947-2 means the MPW-25-3-D008 meets the technical requirements referenced in Saudi Aramco Engineering Standard SAES-P-100 for motor protection and SAES-E-005 for electrical equipment in hazardous areas. SABIC supply chain requirements for MCC equipment similarly reference IEC certification as a minimum qualification. Razz Middle East supplies certified WEG MPW devices with full documentation packages including test certificates, declarations of conformity, and technical data sheets formatted to Saudi procurement requirements.

Installation and Integration

The MPW-25-3-D008 mounts on standard 35 mm DIN rail and accepts cable terminations via screw or spring-clamp terminals depending on variant. The padlockable operating handle supports lockout-tagout (LOTO) safety procedures mandated under Saudi Aramco GI 2.100 and OSHA-equivalent Saudi Labour standards. Auxiliary contacts (1NO+1NC) allow signalling to PLC, DCS, or SCADA systems for remote fault annunciation. Combined with WEG CWM contactors (CWM09 to CWM25), the MPW-25-3-D008 forms a complete DOL starter meeting Saudi industrial MCC specifications.

Saudi Industrial Applications

Motor sizes in the 0.06–0.25 kW range protected by the MPW-25-3-D008 include small HVAC actuator motors, instrumentation air compressor auxiliaries, cooling fan motors in control panels, and small process pump starters. Saudi industrial cities including Jubail, Yanbu, Riyadh Industrial Zone, and Jeddah Islamic Port zone operate numerous facilities that rely on WEG MPW starter assemblies for reliable, standards-compliant motor protection. Razz Middle East delivers pre-wired starter assemblies to EPC contractors and MCC panel builders throughout the Kingdom.

Environmental Suitability

Operating across -25°C to +55°C and tolerating up to 95% relative humidity, the MPW-25-3-D008 performs reliably in the harsh Saudi climate, including hot coastal environments in the Eastern Province and Jizan where humidity and temperature peaks occur simultaneously. The IP20 body protection suits installation within sealed MCC cubicles and motor control panels. For outdoor or wash-down environments, the device is installed inside IP54 or IP65-rated enclosures.

Razz Middle East WEG Partnership

As an authorised WEG distributor in Saudi Arabia, Razz Middle East provides technical pre-sales support, bill-of-materials preparation, and after-sales warranty service for all WEG MPW products. Our engineering team assists customers in correctly sizing motor protection devices to motor FLC values, accounting for motor service factor, starting class, and ambient derating required at Saudi summer temperatures.