YR2(IP44 IP54) ac motor
Product:YR2 Series slip ring motor for general usage
Y,YR 280-355(IP23) series small sized low voltage high power
three-phase induction motor is the latest designed series motor. it
has pleasant appearance,unique mode,some of its technical economy
indexes have reached the international leading level.The products
have been produced in a large volume and exported to more than 20
counties and regions,even all over the countries,they have got the
good appraisal form the users.
This series products adopt the high quality materials,good
manufacturing pocess,have the charcteristics of high efficiency and
enegy-saving ,small vibration,reliable operating and convenient for
mounting and maintenance etc,
The power grade,electric propety,mounting dimentions and tolerance
are coincident with natinal standad GB755 Rotating electric motor
rating and propety,international electrical Committee standard IEC
34-1 Rotating Electric Motor Rating and Property,and machinery
industry standards JB 5272-91.JB 5269-91 etc.
The out cover protections of this series of motor is IP55 in
accordance with the standard of GB 4942.1 and IEC 34-5 enclosure
protection levels of Rotating Electrical Machine.
The cooling method is IC01 in accodance with the standard of GB/T1
993-93 and IEC 34-6 cooling methods of Rotating Electrical Machine.
The structure and installation method of this series of motor is
IMB3(horizontal with footing,end shield without flange).IMV1(shaft
extension downwards and lower end cover with flange),and complies
with the specifications of GB997 and IEC 34-7 motor structure and
mounting cope type.
This sample table lists the technical data and istallation sizes of
380v grade series motor,and may derive the 440v and 660v grade
motors in all sizes.
2. Application Ranges
This series of motor may be used for driving all kinds of general
machines such as the compressor, ventilation fan,water pump,
stock-removing machine,transportation machines and other mechanical
equipment, and are applied as the prime mover in all industrial and
mining enterprises such as the mine,machinery,petrochemical industy
and power plant etc,if the users place an order for the motors that
ae used to drive the machines with huge rotary intertia such as the
blower,coal grinder ,rolling machine,crushe,belt machine,etc,they
shall provide us with relevant technical data,sigh the technical
agreement with us as the basis for specific design of motor to
ensure the reliable operation for motors.
The YR(IP23) series electric motor is capable of providing
relatively large locked rotor torque under relatively small locked
rotor current,and regulating speed within limits,it apply to the
following situations extensively:1 the large locked rotor torque is
required than squirrel cage type motors;2 :the capacity of
transmitting line is insufficient to start squirrel cage type
electric motor;3:long starting time and frequent starting;4:the
speed regulation is required within small range;5:synchronous
rotation with electric Axis,formed by unity.such as
:compressor,presser,winch,bedrench,conveyor,printing machine etc.
Normal operation conditions for motor:
(1) sea level is not over 1000m
(2) the highest ambient temperature is not over 40 °C,the lowest
ambient temperature is -15°C
(3) In moist month,the monthly overage highest relative humidity is
90%,at the same time,the monthly overage lowest temperature is not
over 25 °C
(4) The frequency of power source is 50HZ ±1%
(5) The vaiation fo work voltage is not over rated voltage ±5%
(6) Moto rating is continuos operation system S1.
3. Type description
The motor type is composed of the product code and size in
accordance with the regulations of GB4831. The product code is
represented by the motor series code which meaning is show as
Y----- squirrel cage motor three-phase induction motor
YR----wound rotor three-phase induction motor
The size code is composed of the center height,core length sequence
and pole quantity.
4. Construction description
The frames and end-shields of this series motors adopts high
rigidity casting iron, the stator employs the externally pressing
structure , stator winding( H315,355) consists of flat copper
formed hard coil or circular copper formed random coil, it employs
class B Or F insulating materials , the fixing of winding terminals
employs the special binding process,fixed and reliable .The whole
stator is treated by the vacuum pressure impregnation (VPI) F
solventless paint. thus, the motor has the excellen and reliable
insulation performance,damp-proof and shock resistance.
The squirrel cae motor in this series motor mostly adopts cast
aluminum rotor,running reliable,the wound rotor employs the F-Level
insulation material and uses the vacuum pressure impregnation
F-level solventless paint(VPI) for treatmnt.
The motor employs the rolling bearing structure and the basic
proteciton is IP23
The motor (315-355) has the special oil filling tools may be used
for filling and exhausting the oil without stopping the machine,
The mail teminal box employs the sealed structure, and the
protection class is IP 54, They are generally installed in the
right side of motor(view facing shaft end of the electric motor).
it also can installed in the left side of motor according to the
requirement of users.The box has the separate grounding terminals.
5. Stating of squirrel cage type induction motor
The squirrel cage motor of induction motor have adopted the
advanced computer techique to calculate the starting temperature
and pressure of the squirrel rotor,thus avoid the motor's destroy
at a early period because of the motor 's overloaded while
starting.so we suggest users to check the items as belows:
(1) The moment of inertial (after being converted to motors
rotating speed) of the rotating part of the driven mechanical
equipment should not ove these values item shown in the technical
(2) Customer's should guarantee the voltage of electric network
across the motor's terminals not lower than 85% of the rated value
(3) The resistance moment feature of driven machines is the
resistance moment feature of water pump and fan.
Under the above mentioned conditions,motor may be permitted to be
started at actual cold condition for twice continuously ,or at hot
condition for once,the interval of two times starting is natural
stoppage,if there is need to start over above limit,it must wait
for one hour.
if the moment of inertia of the mechanical rotating part of the
machinery being drive is over the value shown in item of techinical
data, or there is a requirement to start motor frequently ,or it is
possible to start the motor under heavy loading,it is necessary to
contact with our company for negotiating about specification design
so as to ensure the reliable start-up fo motor.
6. Order information
please specify the following items when placing the order;
(1) Motor type:Y355M1-6
(2) Rated frequency:50HZ
(3) Rated power:185kw
(4) Rated voltage:380v
(6) Protection class:IP23
(8) Installation method:IMB3
(9) Rotating direction:clockwise(view facing shaft end of
(10) Position of terminal box:Motor's right side(view facing shaft
end of electric motor)