YFB2 series dust explosion proof three phase asynchronous motors are designed, tested, and manufactured used in environment with comnustible dust, section 1: Technical requirements for electrical equipmemt, part 1: electrical equipment with enclosure and surface temperature limit protection. This series motors are fully enclosed, fan ventilated, and squirrel cage products. They are of remarkable features, such as novel design, compact struction, attractive appearance, high efficiency and torque, excellent starting performance, energy saving, low noise and vibration, and safe and reliable operation. 

Insulation grade: F or H in general. Except for maximum temperature rise, the technical parameters of the two gardes are same. The insulation grade of YBF series motors is F. When the motors operate at an altitude less than 1000 m and the highest ambient temperature is less than 40 C. The maximum temperature rise of stator windings shall be 80K, which 2 pole and 4 pole motors with frame size of 315L and the motors with frame size 355 should be examined by taking the value as 105K. Allowable bearing temperature: not more than 95 C. Protection class of enclosure:IP65. Cooling method: IC411. 

Climate protection types and environment marks:
1) TH-for environment in humid tropics;
2) W-for outdoor and slightly corrosive environment;
3) WF1- for outdoor and moderately corrosive environment;
4) WF2- for outdoor and highly corrosive environment;
5) F1-for indoor and moderately corrosive environment;
6) F2-for indoor and highly corrosive environment

Connection mode: Y connection for the output rating of 3KW and below, Delta connection for the other output ratings;

Cable entry: rubber sheath and steel fiber for choice;

Duty:continuous S1(running under a constant load to reach the steady thermal state)

Auxiliary requirements: the motors with the center height of H315~355 are provided with the oil-filling and draining device.

Electrical equipment used in environments with comnustible dust, part 1: Electrical Equipment with enclosure and surface temperature limit protection.


Work conditions:

Rated voltage: 380/660V 660/1140V
Frame size: H 80~355mm
Output power: 0.75~315KW
Poles: 2/4/6/8/10
Protection class: IP65
Insulation class/ Temperature rise: F/B H/B
Altitude: not exceed 1000 (m)
Rated frequency: 50(HZ)
Duty: continuous(S1)
Ambient temperature: -15C ~ +40C
Ex-Mark: "EXDI" or "EXDIIBT4" "EXDIICT4"

The above is the default parameters, if you have any other special requirements, you can contact us for customization.