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Z Series IEC Medium-Size EPT DC Motor with Brush for Industry
Widely used in variety machines for driving, like metal rolling mill, coiler, sugar compressor, cement kiln and extruding machine for rubber and plastic.
- Frame sizes: 500-710
- Rated output: 310-1600kW
- Insulation class: F
- Duty cycle: S1
- Degree of protection: IP23, IP44
- Excitation mode: Separate excitation
- Voltage: 440V, 550V, 660V, 750V
This series motors are of polygonal structure, interior space of stator is well utilized. With laminated stator core, the motor can be powered by silicon-controlled rectifier supply and can withstand sharp changing in current(pulsing current). Exact orientation of the magnetic pole, the motors have excellent change-over performance. F insulation class and well-cooled by insulated material and Vacuum Pressure Impregnation.
Altitude not exceeds 1000m. Incoming cooling-air temperature shall be no higher than 40ºC;incoming cooling-water temperature shall be no higher than 32ºC;the motors adopt external excitation mode, the voltage is 220V, the motors’ rating voltage are 440V,550V,660V,750V(which to chose depends upon actual condition); forced excitation is allowed but its voltage shall be no higher than 500V. Exciting current can’t be higher than its rated value when the motor is working.
Designation of Types
Note:Dimensions here are indicative only. Actual product may differ.
1. Cooling method and protection degree
a)Separately cooling device, GB/T1993 “Cooling Methods for Rotating EPT Machine” defines 4 cooling methods IC06,IC17,IC37,IC86W, and the standard type is the one whose cooling air entrance is at the driving end (not change-over end)
b)GB/T4942.1 “Classification of Degree of Protection Provided by Enclosure of Rotating EPT Machines (IP Code)”defines 2 protection class of IP23 and IP44. If clients are interested in other cooling method and protection grade, consult the producer firstly.
c)Cooling method and protection grade information see below table:
With built-on blower
Pipeline air inlet
Free of outlet wind
The Pipeline inlet and outlet wind
|Insulation class||IP23 (prevent drop)
Prevent solid particles Diam. above 12mm
Prevent solid particles Diam. above 1mm
d)Cooling air input, air pressure, cooling water input, and blower motor power see sheet 2 below:
|Frame||Built-on blower||Air-water cooler|
- Blower motors are three phase,380VAC,50HZ.
2. Motor mounting type
GB/T997 “Symbols for Types of Construction and Mounting Arrangement of Rotating EPT Machinery” defines 2 mounting types of IM1001 (horizontal motor, single cylindrical shaft extension) and IM1002 (horizontal motor with feet, double cylindrical shaft extension). If clients are interested in other installation type, consult the producer.
3.Standard position of the terminal box is at the right side of the motor from the view of DE. If the terminal box needs to be fixed at the left side of the motor, client shall specify in the contract.
4. Rolling bearing, and non-stop refuel device.
5. Available auxiliary devices (must specify in contract)
a)Temperature sensor can be fixed at stator winding and bearing chamber on each end, and its out-leading cable need to be connected to terminal box.
b)Speed measuring and protecting device consisting motor-testing devices, centrifugal switch, encoder etc can be fixed on the NDE side.
c)Heater can be installed
6.Air/water cooler is usually fixed on the upper side of the motor. If the cooler is requested to be mounted at sides of the motor, client need to specify in the order or contract. Besides, clients is responsible for the auxiliary support of the cooler.
7.Cooler can be installed with LFAS, temperature controller and heater.
1. Technical Data:
a)Altitude not exceeds 1000m.
b)Air temperature at inlet of cooling blower shall be no higher than 40ºC; inlet water temperature shall be no higher than 32ºC.
c)Correct cooling method and protection grade should be chosen to keep the internal parts clean if the motor need to be installed in harsh environment. Consult the producer for detail information.
d)Three phase bridge rectifier power supply, non-external flat wave reactor, direct-power generator are available.
e)Conform to GB755 “Rotating EPT machines-Rating and performance”,IEC60034-1 “Rotating EPT machines-Rating and performance” and JB/T9577 “Technical specification for Z series DC motor”
2. Rated voltage 440V,550V,660,750V. Consult the producer if the clients are interested in motor of other voltage.
3. The motor is separate-exciting type whose exciting voltage is 220V. Consult the producer for derived motor of other voltage. Forced exciting whose voltage no more than 500V is allowed, but the exciting current can’t be higher than rated value during operation.
4. Short duration overload capacity
TypeI(A): DC motor for general industrial purpose
TypeII(B): DC motor for metal rolling mill
a): TypeI(A) motor:Short duration (1 min)overload capacity see table 3
|Basic Speed %||Rating Current %|
|Occasionally Use||Frequently Use|
b): TypeII(B) motor:Short duration(1 min)overload capacity see table 4
|Basic Speed %||Rating Current %|
|Occasionally Use||Frequently Use|
* When the basic speed ≥650r/min, take the value in ( ) as reference.
c): Occasionally-used overload capacity refers to the performance when the motor operated with continuous rated load within 1 min, which takes place rarely or when emergency occurs, and the instantaneous breaking device of circuit breaker is suggested to set to the occasionally-used short-tie overload capacity mode; frequently-used overload capacity, parts of the normal operation cycle, refers to the performance when the motor subject to the repetitive rated load.
d): TypeII(B) DC motor can bear the following continuous load:
In rated voltage and rated speed the motor can work with 115% rated output power load. Under this circumstance, the motor’s performance may differ from the one under rating condition due to its high temperature rise.
In rated voltage and rated speed, the motor can work with 125% rated output power load for 2 hours after that the motor operates continuously with rated load for a while. Under this circumstance, the motor’s performance may differ from the one under rating condition due to its high temperature rise.
e): Type II (B) DC motor, when operating by rating speed, the motor allows to operate with 2.5 times its rated load for short time no longer than 15s(Consult manufacture and when they permit)
5. Current changing rate
The maximum current changing rate (di / dt) the motor can bear is 250 times of rated current.
a)Vibration and noise
b)Vibration shall meet the standard of GB10068 “Mechanical vibration of certain machines with shaft heights 56mm and higher- Measurement, evaluation and limits of vibration severity “
c)Noise shall meet the standard of GB10069.3 “Measurement of airborne noise emitted by rotating EPT machinery and the noise limits “
d)Technical data (output, voltage, efficiency at rated speed) refers to the rated value, including its exciting loss.
1. TypeI(A) DC motor for general industrial purpose
Motor size, voltage, speed, cooling method see the technical data sheet below.
2. Type II (B) DC motor for metal rolling mill
The rated output power is 20% lower than that of Type I, contact the producer for detail information.
3. For the information of derived motor contact the producer.
1. Specify the motor type, power, voltage, rotation speed, exciting voltage, cooling method, shaft quantity, terminal box position etc.
2. Specify the auxiliary device type, specification, quantity etc.
3. When the motor operates in humid topics, make mark of “TH” behind general purpose motor type
4. Provided the clients were interested in the motor of other specification with respect to technical parameter contact the producer directly.
*Specify the motor type, power, voltage, rotation speed, exciting voltage, cooling method, shaft quantity, terminal box position etc.
*Specify the auxiliary device type, specification, quantity etc.
*When the motor operates in humid topics, make mark of “TH” behind original motor type
*If the motor on the sample book can’t meet clients’ requirement, various motor of other technical requirement are also available. Contact the producer directly.
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