Specialty Motors per API 541 4th Edition & API 547 Specifications
 The highly demanding process industries, from oil production and refining to chemical processing and power generation, have adopted two rigorous standards set forth by the American Petroleum Institute for motor reliability and performance. API 541 - 4th Edition is for the most critical special purpose motors and API 547 is for severe-duty general purpose motors. No one meets these demanding standards with fewer comments or exceptions than Siemens. |
Feature | API 541 4th Edition | API 547 |
|---|
Configuration | Horizontal & Vertical | Horizontal | Horizontal |
Enclosures | All | WPII & TEFC | WPII & TEFC |
Poles | 2 - 16 | 2 | 4 - 8 |
Power Range | 250 - 10,000 HP | 250 - 800 HP (TEFC), 250 - 1,250 HP (WPII) | 250 - 3,000 HP |
Voltage | 2300 - 13,200V | 2300 - 13,200V | 2300 - 13,200V |
Service Factor | 1.0 (1.15 option available) | 1.0 | 1.0 |
Main Terminal Box | Cast iron or fabricated steel | Cast iron or fabricated steel |
Auxiliary Boxes | Cast iron (NEMA 4X option available) | Cast iron (NEMA 4X option available) |
Shaft | AISI 1045 (AISI 4140 option available) | AISI 1045 (AISI 4140 option available) |
Rotor | Fabricated copper | Aluminum die cast <=1000HP otherwise fabricated copper (Fabricated copper option available for <=1000HP) |
Lamination Material | C5 core plate | C5 core plate |
Insulation | F-VPI MiClad™ | F-VPI MiClad™ |
Hardware | 300 series stainless steel | 300 series stainless steel |
Paint | Two-part epoxy (special paint system option available) | Two-part epoxy (special paint system option available) |
Paint Color | Siemens Motor Blue (other color option available) | Siemens Motor Blue (other color option available) |
Bearing Type | Sleeve bearing | Sleeve bearing |
Warranty | 12 months operational not to exceed 18 months from shipment (deferred and/or extended option available) | 12 months operational not to exceed 18 months from shipment (deferred and/or extended option available) |