Sourcing Requirements
Product: high-temperature smoke-extraction motors for fire-duct systems Power range: 1–100 HP Rated voltage/frequency/phase: supplier to confirm (reference 460 V, 60 Hz, 3-phase) Temperature rating: 400°C for 120 minutes; third-party test report required Duty: S1 continuous / S2 emergency Insulation: Class H with VPI VFD duty: required for 15–100 HP Enclosure: IP55 TEFC; metal cooling fan Construction: cast-iron frame and metal terminal box Certification: UL 705/UL 507 or EN 12101-3 Lubrication: high-temperature synthetic grease, dropping point above 260°C High-power requirements: insulated NDE bearing for 100 HP, three PTC thermistors, star-delta or VFD soft start Fire mode: continuous operation until failure or loss of power, overriding thermal/overload trip signals Commercial documents: unit prices by power/RPM configuration, lead time, warranty and technical certificates