JK, JS, JR, JS2, JR2, JSL, JRL series medium-sized motors are used to drive a variety of different machinery, such as fans, compressors
Machines, water pumps, crushers, coal mills, cutting machine tools, transportation machinery and other equipment, and can be used as prime movers in coal mines, machinery industries, power plants and various industrial and mining enterprises.
2 Basic conditions for normal motor operation
a. The altitude does not exceed l000m;
b. The maximum ambient air temperature does not exceed 40 ° C; the minimum ambient air temperature is -15 ° C;
c. The average monthly maximum relative humidity of the wettest month is 90% and the average minimum monthly temperature of the month is not higher than 25 ° C;
d. Power frequency is 50Hz ± l%;
e. The working voltage change range is not more than ± 5% of the rated voltage;
f. The motor rating is continuous duty S1.
3 Model description
The motor model is composed of the product code and the specification code in order according to the provisions of GB4831. Product code by motor series
The code indicates that the meaning is as follows
JK—— Squirrel-cage rotor high-speed three-phase asynchronous motor JS, JS2— Squirrel-cage rotor three-phase asynchronous motor JR, JR2— Wound rotor three-phase asynchronous motor JSL—— Squirrel-cage rotor vertical three-phase asynchronous motor JRL— — Winding rotor vertical three-phase asynchronous motor
The specification code consists of the frame number, the serial number, the core length serial number, and the number of poles.
4 Structure description
The basic installation type of the motor is IMB3 structure, that is, it has two end cap bearings and a cylindrical shaft extension.
Drive mechanical connection. This series of motors are protection type, JK can also be made into single shaft extension motor, JS, JS2 can also be made into double shaft extension motor.
The motor allows direct starting at full voltage. The main insulation of the high voltage motor stator coil is wrapped with epoxy powder mica tape and vacuum-dried. The overall pressure is impregnated without dissolution.
JR and JR2 motors are equipped with slip rings. The slip rings are mounted on the non-working shaft extension, and there is a protective cover. Current flows from the coil through the electricity in the shaft hole
The cable is connected to the slip ring and the brush to prevent the brush powder from contaminating the coil, which reduces the maintenance of the coil.
5 Starting of JK, JS series motors
The rotor of the squirrel-cage asynchronous motor uses advanced calculation technology to calculate the starting temperature rise and stress of the squirrel-cage rotor to prevent electric
The motor is damaged early due to the heavy starting load. The user is recommended to check: (1) the moment of inertia of the rotating part of the driven mechanical equipment (converted to the motor speed) should not exceed the value of [Load J] in the technical data table; (2) the user's power grid should ensure that the motor The voltage of the motor terminal during the starting process is not less than 85% of the rated voltage; (3) The resistance torque characteristic of the driven machine is the resistance torque of pumps and fans.
Under the above conditions, the motor is allowed to start twice in the actual cold state, and the motor is naturally stopped between the two starts; or it is started once in the hot state of the motor. Restarting the motor beyond the above limits should be stopped after 1 hour.
If the moment of inertia of the mechanical rotating part of the motor drive exceeds the value of [Load J] in the technical data sheet, or the motor is required to be started frequently, or the motor may be started with a heavy load, please contact our company in advance for special, Designed to ensure reliable starting of the motor.
6 Ordering instructions Please indicate the following when ordering
a. Motor model: (JS158-4)
b. Rated frequency: (50Hz/60HZ)
c. Rated power: (10KW-680kW-5000KW-100MW)
d. Rated voltage: (460-6KV-10KV-20KV)
e. Number of poles: (2-4-18 poles)
f. Outlet box position (right side of the motor [looking at the end of the motor shaft extension]