YBX3 series Low Voltage Explosive-Proof Electric Motor

Frame Size: 80-355mm

Power: 0.75-315kW(2 poles)

0.55-315 kW (4 poles)

0.75-250kW(6 poles)

2.2-200kW(8 poles)

45-160kW(10 poles)

55-132kW(12 poles)

Voltage: 220/380/400/415/440/660/690V (±5%)

Frequency: 50Hz/60Hz (±1%)

Speed: 2950/1450/980/730/590/490rpm(50Hz)

3560/1760/1180/880/708/588rpm(60Hz)

Insulation Grade: F Class (155℃)

Protection Class: IP54/IP55/IP56

Temperature Rising: ΔT=80°K (B class)

Bearing type: Roller/Ball bearing

Working Duty: S1 (Continuous)

Service Factor: 1.00

Ambient Temperature: -20°C ~ 40°C

Altitude: 1000m.a.s.l

Ambient humidity: ≦90%

Efficiency: lE3 Explosive-Proof

Cooling Method: lC41 1/1C416

Installation: IMB3/IMB5/IMB35/IMV1

Flame-Proof (Explosive-Proof): ExdIIBT4

Performance Range:

General Description

YBX3 series high-efficiency flame-proof motor is designed by our company with advanced technology for domestic and overseas markets. YBX3 series low voltage three phase explosive-proof motor (Frame: 80mm ~ 355mm) is a high-efficiency three-phase asynchronous motor. It has the advantage of novel design, smooth appearance, low noise, high torque, good starting performance, compact structure, convenient use and maintenance, etc.

Its efficiency fully meets the GB18613-2020 "small and medium-sized three-phase asynchronous motor energy efficiency limit value and energy efficiency grade" in the 2 energy efficiency regulations, and through the China Quality Certification Center's energy-saving product certification, access to China's energy-saving product certification.

The power level, electrical performance and installation dimensions and tolerances of this series of motors are in line with the national standard GB755 "Rotating Motor Quota and Performance" International Electrotechnical Commission standard IEC60034-1 "Rotating Motor Quota and Performance" and the mechanical industry standard GB/T 4772.1.

The protection level of the shell of this series of motors is IP54 and IP55 respectively according to GB4942.1 and IEC60034-5 "protection level of rotating motor shell of rotating electrical machines".

The cooling method of this series of motors is IC411 according to GB/T1993 and IEC60034-6 "Cooling Methods for Rotating Electrical Machines.

Their flameproof performance should meet GB3836.1-2021 (follow IEC600079-0:2017)《Explosive atmospheres Part1: Apparatus General requirements》 and GB3836.2-2021 (follow IEC600079-0:2017)《Explosive atmospheres, Part2: Apparatus protected by the crust for flameproof “d” 》. The flameproof types of this series motors are ExdI, ExdIIAT4 and ExdIIBT4，and suitable for the non-mining working area in underground mine or the dangerous locations in factories where there are the explosive gas of class IIA and IIB and temperature of class T1～T4.

The structure and installation type of this series of motors are IMB3 (horizontal with feet, end cover without flange),IMB5 (horizontal base without feet, end cover with flange),IMB35 (horizontal base with feet, end cover with flange),IMV1 (vertical base without feet, end cover with flange) in accordance with GB997 and IEC60034-7 "Motor Structure and Installation Type Code.

This series of motors adopt F-class insulation, and the whole series of temperature rise according to B- class assessment, thus greatly improving the safety and reliability.

Scope of use

This series of motors can be used to drive various general machinery such as compressors, ventilators, water pumps, cutting machine tools, transportation machinery and other mechanical equipment, and used as prime movers in various industrial and mining enterprises such as mines, machinery, petrochemical industries, power plants, etc. Motors used to drive large rotational inertia blowers, coal mills, rolling mills, winches, crushers, belts and other machinery shall provide relevant technical data and sign technical agreements when ordering, as the basis for the special design of the motor to ensure the reliable operation of the motor.

Structure description

The motor base and end cover are made of high-strength cast iron, and the stator is of external press-fit structure. The stator winding adopts round copper wire loose embedded soft winding. Class F insulating material is adopted, the winding end is fixed with special binding process, which is firm and reliable. The whole stator is treated with vacuum pressure impregnated class F solvent-free paint (VPI). As a result, the motor has excellent and reliable insulation performance, moisture resistance and impact resistance.

The squirrel cage rotor of this series of motors adopts cast aluminum rotor, which is reliable in operation; the bearing is rolling bearing, and the basic type of protection grade is IP54. For example, when the motor has a higher protection level, the protection level of the bearing is also increased.

315~355 motors are equipped with non-stop oil filling and oil discharge devices, and special oil filling tools can be used for non-stop oil filling and oil discharge.

The main outlet box is of sealed structure, and the protection level is consistent with that of the motor. The main outlet box is generally installed on the top of the motor base, and can also be installed on the side of the base according to user needs. There is a separate ground terminal in the outlet box.

Starting of squirrel cage asynchronous motor (YBX3 series)

The rotor of squirrel cage asynchronous motor adopts advanced calculation technology to calculate the starting temperature rise and stress of the squirrel cage rotor, so as to prevent the motor from being damaged early due to the heavy starting load. It is suggested that the user check:(1) the moment of inertia of the rotating part of the driven mechanical equipment (after conversion to the motor speed) should not exceed the value of [load J] in the technical data sheet;(2) The user's power grid shall ensure that the motor terminal voltage during the starting process of the motor is not less than 85% of the rated voltage;(3) The resistance torque characteristics of the driven machinery are the resistance torque characteristics of water pumps and fans.

Under the above conditions, the motor is allowed to start twice continuously in the actual cold state, and the motor is naturally stopped between two starts; or it is started once in the hot state of the motor. Restarting the motor beyond the above limits shall be after 1 hour of shutdown.

If the moment of inertia of the mechanical rotating part of the motor drive exceeds the [load J] value in the technical data sheet, or the motor is required to be started frequently, or the motor may be started with heavy load, please contact our company in advance for special design to ensure the reliable starting of the motor.