JB/T 12309.1-2015Specification of flameproof three-phase asynchronous motors - Part 1: YB3 series flameproof three-phase asynchronous motors (frame size 400 to 500) (English PDF)

National Standard of the People's Republic of China

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

Contents

• 1 Scope
• 2 Normative references
• 3 Type, basic parameters and dimensions
• 4 Technical requirements
• 5 Test methods
• 6 Inspection rules
• 7 Marking, packaging and warranty period
• Figure 1 Outline and mounting dimension drawing (1)
• Figure 2 Outline and mounting dimension drawing (2)
• Figure 3 Outline and mounting dimension drawing (3)
• Table 1 Correspondence between the frame number and the speed and power
• Table 2 Outline and mounting dimensions and tolerances (1)
• Table 3 Outline and mounting dimensions and tolerances (2)
• Table 4 Outline and mounting dimensions and tolerances (3)
• Table 5 Dimensions and tolerances of the shaft extension key
• Table 6 Radial run-out tolerances
• Table 7 Parallelism tolerances
• Table 8 Flatness tolerances
• Table 9 Symmetry tolerances
• Table 10 Guaranteed values of the efficiency
• Table 11 Guaranteed values of the power factor
• Table 12 Guaranteed values of the ratio of locked rotor torque to rated torque
• Table 13 Guaranteed values of the ratio of maximum torque to rated torque
• Table 14 Guaranteed values of the ratio of locked rotor current to rated current
• Table 15 Tolerances on the guaranteed values of the electrical performance
• Table 16 Time interval after switching off
• Table 17 Test voltage
• Table 18 Peak value of the impulse test voltage
• Table 19 Limits of vibration severity expressed as displacement, velocity and acceleration (root mean square values)
• Table 20 Noise limits of the A-weighted sound power level on load
• Table 21 Maximum permissible increase of the A-weighted sound power level at rated load over no load
• Table 22 Test items
• Table 23 Marking of the terminals