YZR/YZ Type Motors Short-time Duty
YZR, YZ series motor is suitable for driving various kinds of hoisting machinery and auxiliary equipment, smelting with high overload capacity and mechanical strength, especially suitable for short-term or intermittent operation, frequent starting, braking and significant vibration and impact of the equipment.
Motor has good sealing, the places for general motor protection class is IP44, motor protection class is IP54. Used in metallurgy places YZR series of wound rotor three-phase asynchronous motor, YZ series for squirrel cage rotor three-phase asynchronous motor.
The insulation grade of motor is divided into two categories: F and H. F is suitable for cooling medium temperature is not more than 40 ℃ general places; H level suitable for cooling medium temperature is not more than 60 ℃ metallurgy, two motors with the same parameters.
The protection grade of protective grade metallurgical motor enclosure is IP54; The reusing motor shell level is IP44
The engine seat of the cooling method is 160-355 IC0141
The insulation grade of the insulation grade metallurgical motor is H class, and the insulation grade of the reusing motor is F.
The terminal box of the junction box motor is located at the top of the seat, which can be connected by any side of the seat.
The transmission mode motor adopts the coupling or gear transmission, and the diameter of the gear pitch circle should not be less than twice the diameter of the shaft.
1. Short-time duty
At a constant load, the machine is run at a given time, and when it is not hot and stable, it can be stopped and broken for a period of time, so that the electric motor can be cooled to the temperature of the cooling medium within 2K.
2. Intermittent periodic duty system
According to a series of the same work cycle run, each cycle includes a constant load running time and period of downtime and can break time, but its running time is shorter, not enough to make the motor to achieve thermal stability state, and in this week starting current had no obvious effect on temperature rise.
3. Including the start - up cycle work
According to a series of the same work cycle run, each cycle includes a starting time, a constant load running time and period of downtime and can break time, but the time is shorter, all is not enough to make the motor to achieve thermal steady state. It is possible to influence the stability of the motor, such as the ring, brush frame and grip.
4. Including the intermittent duty cycle of electric braking
According to a series of the same work cycle run, each cycle includes a starting time, a constant load operation time, a rapid electric braking time and period of downtime and can break time, but the time is shorter, all is not enough to make the motor to achieve thermal steady state.
5. The motor can operate normally under the following conditions.
(1) the environment temperature is not more than 40 ℃ (general environment) or 60 ℃ (metallurgical environment);
(2) the elevation is not more than 1000m;
(3) frequently mechanical vibration and impact;
(4) frequent starting, braking (electrical or mechanical) and reversal.
6. The rated frequency of the motor is 50Hz and the rated voltage is 380V.
7. The power is 132kW and the following stator winding with Y connection, and the rest with delta connection, and the motor of Y connection can increase the zero point lead.
8. Output power and speed reference work (S3-40%) rated output power and synchronous speed.