Y, YLST,YKKL, YKSL Series Medium-scale Vertical Asynchronous Motors

A) General
     YL, YLST, YKKL, YKSL series Medium-scale 3-phase vertical asynchronous motors(base No. 335-630) are the motors of new generation to replace the JSL11-15# series vertical 3-phase asynchronous ones. They are designed in 1990s by introducing advanced technology of motor design and manufacture from abroad, and by our motor manufacture experiences of 50 years. After near 10 years of marketing, we have improved the design and manufacture technique and the products have position the leading place in China. Now they also exported to the countries and regions in Europe, USA, Africa, South-east Asia, Hongkong and Maucau. The users are all satisfied with the quality and reliability.
     These motors are designed elaborately and with advanced structure and made of refined materials. They have the features of high-efficiency, low noise, low vibration, reliable and easy to operate and maintain.
     The motors comply with the standard GB755 Basic Specifications of Rotary Machine and the standard IEC34-1 Rating and Performance of Rotary Machine.
     The motors comply with the standards GB4942.1 and IEC 34-5 Invasion Protection Class of Rotary Machine. According to the above standards. The Y, YLST motors have two IP classes- IP 23 and IPW24. The responding IP classed for YKKL and YKSL motors are IP44 and IP54. If ordering for motors with other IP class, the separate technical agreement is required before order.
     According to the standards GB/T1993 and IEC34-6 Cooling Method of Rotary Machine, YL and YLST series have the cooling code of IC01, and YKKL IC611, and YKSL IC81W. If ordering for motors with other cooling type, the separate technical agreement is required before order.
     The structure and mounting type of these motors is IMV1(horizontal, flange). They comply with the standards GB997 and IEC34-7 Coding for Motor Structure and Mounting Type.
B) Application
     These motors are used for vertical mounted pumps and other common machinery. The working conditions are shown as follows.
a) Altitude ≦1000m.
b) Ambient Temp. ≦400C; for rolling bearings >-150C; for sliding bearings, >50C; for YKSL, >50C.
c) For YKSL , coolant temp. at cooler inlet ≦330C and >50C.
d) Maximum month average RH of the most humid month <90% and the month average of lowest temperatures of that month <250C.
e) Power Frequency Variation: 50Hz±1%.
f) Fluctuation of Rated Voltage <±5%.
g) Working Duty: S1.

C) Model Symbols
     According to GB4831, the model consists of two parts- product symbol and specification symbol.
     The following shows the meanings of product symbols.
YL – Squirrel Cage 3-phase Vertical Asynchronous Motor Withstanding no Axial Load
YLST – Squirrel Cage 3-phase Asynchronous Motor Withstanding Axial Load
YKKL – Enclosed Squirrel Cage 3-phase Vertical Asynchronous Motor with air-air Cooler
YKSL – Enclosed Squirrel Cage 3-phase Vertical Asynchronous Motor with air-water Cooler
For Example:
4 – 4 poles
500 – central height (same as that of horizontal one)
YLST – Squirrel Cage 3-phase Vertical Asynchronous Motor Withstanding Axial Load

D) Structure Description
     The motor has a box structure, which prevails now. The rectangular base is welded of steel plates, which has the features of sufficient rigidity and less weight. The YL, YLST and YKKL(YKSL) motors are different in the covers and air-air(water) coolers.
The stators of our motors are mounted by outside press method and the windings are made of materials of F insulation class and discharge-resistant materials. Winding ends are all fixed with special operation and secured reliably, and the complete stators are treated with VPI technique. By these, our motors have excellent insulation, damp-resistant and impact-resistant performance. For the squirrel cage, there are two types- cast aluminum and copper. The copper bars are secured in slots and welded securely at the ends.
     According to that if there is axial load or the value of the axial load, the motors are designed with rolling bearings or sliding bearings. The bottom bearings are rolling type.
There is no-stop lubrication system for all these motors with rolling bearings. The main terminal box is enclosed type with the invasion protection of IP 54 . The cable outlet of the connection box can be switched upwards, downwards, leftwards or rightwards. The connection box has a separate PE terminal.

E) Starting of Motors
a) The terminal voltage of the motor is not less than 85% of rated voltage when starting.
b) The characteristics of the counter-torque of the driven load are like pumps or blowers.
     Under the above conditions, motors are allowed to start for twice continuously under cool condition or for once under hot condition. Between the two starts, it must be normal stop and the second start shall be activated after one hour.
     If the driven machinery is not the pump type vertical machinery, please contact us prior to order. We will specially designed according your requirements to ensure the reliable starting of motor.

F) Order Information
     The following information shall be attached with order.
Model: YL500-4
Rated Power: 1000kW
Rated Voltage: 6kV
Rated Frequency: 50Hz
Poles: 4
Insulation Class: F
Direction: Counterclockwise (view from shaft)
IP: 23
Cooling: IC01
Mounting Type: IMV1
Ambient Conditions: Altitude ≦1000m, 5~400C
a) The existence of the axial load shall be indicated with its direction when ordering YKKL and YKSL motors
With specific axial load, separate agreement should be made before order.
b) The specifications in the catalogue are subjected to change without notice.
c) For the motors that its specifications are not shown in catalogue, please contact us for installment dimensions after placing order.
d) The YRL, YRKKL, YRKSL series wound-rotor medium-scale 3-phase vertical asynchronous machines are also available.