JS squirrel cage three-phase asynchronous motor

Description

Model Explanation for Xi’an Lite simomotor.net JS Series Squirrel Cage Three-Phase Asynchronous Motors

• JS115-6: Indicates a squirrel cage rotor asynchronous motor.
  • 11: Frame number.
  • 5: Core length code.
  • 6: Number of poles.
• JR115-6: Indicates a wound rotor asynchronous motor.
  • 11: Frame number.
  • 5: Core length code.
  • 6: Number of poles.

The JR series motors are available in two versions:

1. With brush lifting and short-circuiting devices.
2. Without brush lifting and short-circuiting devices.

Overview of Xi’an Lite simomotor.net JS Series Squirrel Cage Three-Phase Asynchronous Motors

The J series medium-sized motors are designed to drive various types of machinery, such as:

• Fans,
• Compressors,
• Pumps,
• Crushers,
• Ball mills,
• Cutting machine tools,
• Transport machinery, and
• Other equipment.

These motors are suitable for use in:

• Coal mines,
• Machinery industries,
• Power plants, and
• Various industrial and mining enterprises as prime movers.
• JS series: Squirrel cage rotor three-phase asynchronous motor.
• JR series: Wound rotor three-phase asynchronous motor.

Standards and Construction

• The JS series complies with the technical conditions of JB563-64 standards.
• The JR series complies with the technical conditions of JB564-64 standards.

The motors are of a protected type by default but can also be made as a duct-ventilated type upon customer request.

Operating Conditions

• Installed at an altitude not exceeding 1 km.
• Ambient air temperature:
  • Not exceeding +40°C.
  • Not less than 0°C.
• Clean air environment without acid, alkali, or other corrosive gases.
• Not suitable for operation in explosive or dust-filled environments.

For environments where air temperatures exceed the specified range or are not clean, duct-ventilated motors are recommended. In this case:

• The cooling air temperature entering both ends of the motor should be between 0°C and +40°C.
• The air pressure inside the duct and motor must exceed the surrounding air pressure.
• Additional equipment, such as blowers or dust filters, may be required.

Starting Characteristics

• JS series motors:
  • Allow direct full-voltage starting.
  • Initial starting torque and starting current ratios to rated values are shown in Table 3.
  • If full-voltage starting is not permissible due to network constraints, reduced-voltage starting can be used. However, in this case, the starting torque decreases proportionally to the square of the starting voltage.
• JR series motors:
  • During startup, a starting resistor must be connected to the rotor circuit in advance.
  • Direct short-circuiting of the rotor windings is not permitted during startup.