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GB 755-2008: PDF in English

GB 755-2008
Rotating electrical machines.Rating and performance
ICS 29.160.01
K20
National Standards of People's Republic of China
GB 755-2008/IEC 60034-1.2004
Replacing GB 755-2000
The rotary electric machine rating and performance
(IEC 60034-1.2004, IDT)
Published 2008-06-19
2009-06-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China issued
Table of Contents
Preface Ⅰ
1 Scope 1
2 Normative References 1
2 3 Definitions
4 Duty 5
5 rating 14
6 on-site operating conditions 16
7 Electrical operating conditions 17
Thermal and 8 Test 21
Other performance tests 9 and 30
10 Nameplate 36
11 37 Other required
12 38 Tolerance
13 Electromagnetic compatibility (EMC) 39
14 Safety 40
Application of heat and determining the relative value of the expected lifetime TL guide Annex A (Informative Appendix) SlO duty is 41
Annex B (informative) Electromagnetic compatibility (EMC) limits 42
GB 755-2008/IEC 60034-1.2004
Foreword
Chapter 8 of this standard temperature and the temperature rise limit 8.10, Chapter 9 withstand voltage test 9.2, 9.6 Induction Motors operate safely
Line speed, 9.7 speed, Chapter 11 11.1 grounding protection, Chapter 13 Electromagnetic compatibility (EMC), Chapter 14, security is mandatory that
It is recommended. Mandatory provisions in the above table and an indicator of the mandatory technical content.
Equivalent standards adopted IEC 60034-1.2004 "rotating electric machine rating and performance" (11th edition).
This standard is based on the standard of the rotating electric machine, and which defines the technical requirements of basic performance of the motor. Related products in addition to special requirements
Such products should be included in the technical standards, the rest shall comply with this standard.
This standard replaces GB 755-2000.
This standard GB 755-2000 comparison, change of place.
a) the reference temperature water as the cooling medium, particularly temperature unchanged, over the submersible motor is not considered included in this range.
b) measure the distortion factor to increase the harmonic current of the load circuit requires.
c) In view of the production is no longer used or rarely A, E-grade insulation, canceled A, E content level insulation, and to deposit greater than 200kW
Class F insulation permissible temperature of the DC motor improved 5K.
d) voltage varies with changes temperature correcting section, raising the voltage, reducing the correction amount.
e) increased motor inspection test items.
f) modifying the terms of the withstand voltage test.
g) Modify the predetermined minimum torque cage induction motor.
h) increasing the maximum safe operating speed requirements cage induction motor.
i) synchronous motor telephone harmonic factor (THF) use amount of total harmonic distortion synchronous motor (THD) is represented.
j) Modify the tolerance table.
k) simplifies the description of the terms of EMC requirements.
The standard 6.5 "cooling water temperature not higher than 25 deg.] C", and according to our natural environment, if necessary, cooling water temperature not higher than + 33 ℃.
This standard Annex A, Annex B are informative annex.
The standard proposed by China Electrical Equipment Industrial Association.
This standard by the National Standardization Technical Committee of rotating electrical machines (SAC/TC26).
Responsible for the drafting of this standard. Shanghai Electrical Apparatus Research Institute (Group) Co., Ltd., Shandong Motor Group Co., North
Bi Jie Beijing Electric Co., Ltd., Zhejiang Jinlong Electrical Machinery Co., Ltd., Hebei Electric Co., Ltd., Xi'an Simo Motor Co.
Division of Motor Manufacturing Co., Ltd. Shandong Qilu, China Northern Locomotive and Rolling Stock Industry Group Yongji Electric Factory, Wheeling Qingjiang Motor Co., Ltd.,
Wuxi Huada Motor Co., Ltd., Xiangtan Electric Co., Ltd., Wolong Electric Corp., CSIC Electrical Machinery Technology Co. Shares
The company, Lu'an Jianghuai Motor Co., Tellhow Technology Co., Ltd., Shanxi Ex Motor (Group) Co., Ltd., Shanghai Electric Division Electrical Branch
Technology Co., Ltd.
Participated in the drafting of this standard. Harbin Institute of Large Electric, China Electric Apparatus Research Institute, Lanzhou Electric Co., Ltd., Anhui Wannan
Motor Co., Ltd., Shanghai Nanyang Electric Co., Ltd., Hebei Hengshui Electric Co., Ltd., Shanghai-Hui Electric Co., Ltd., Hai Mai
Gert Motor Co., Ltd., Jiangsu Wuxi Anderson explosion, the Yangtze River Shipping Group Motor Factory, Jiangsu Dazhong Electric Corp..
This standard drafter. Li Xiuying, ENCHNOLOGY Fu Zhanghong PROJECTION Zhou Shoulian, Ye Jinwu, Yang Xiujun, Lee Jin, Wu Dezhong, Hezhi Science,
Cao Hongtao, Chen Li, Guo lighthouse, Meng China, Li Bao, the Liu Lihan, Kang Maosheng, Lin Yang pivot.
This standard supersedes the previous editions are.
--- GB 755-1987;
--- GB 755-2000.
GB 755-2008/IEC 60034-1.2004
The rotary electric machine rating and performance
Range 1
This standard applies to all rotating electrical machine, with the exception of the motor and under other international IEC standards, for example, IEC 60349.
Machine covered by this standard may also be substituted by the compliance requirements and other international standards IEC modify or supplement, e.g. GB 3836
(IEC 60079) and GB/T 7060 (IEC 60092).
Note. in order to apply, for example, resistance to radiation or aerospace motors and motor must be modified in certain provisions of this Standard special purposes, all of the other provisions
Still valid when it can be applied.
2 Normative references
Terms of the following documents become provisions of this standard by reference in this standard. For dated reference documents, all later
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to agreements based on this standard
Whether the latest versions of these documents. For undated references, the latest version applies to this standard.
GB/T 156-2007 standard voltage (IEC 60038.2002, MOD)
GB/T 755.2-2003 rotary electric machine (except traction motor) Test Method for determining losses and efficiency (IEC 60034-2.1996,
IDT)
GB 1971-2006 Terminal markings rotary electric machine direction of rotation (IEC 60034-8.2002, IDT)
GB/T 1993-1993 rotary motor cooling (eqv IEC 60034-6.1991)
GB/T 2900.25-2008 Electrotechnical terminology rotary electric machine (IEV50 (411).1996)
GB/T and a basic method and a specific terminal equipment safety rules conductor terminal identification marking and identification 4026-2004 HMI and
General application alphanumeric system (IEC 60445.1999, IDT)
GB 4343.1-2003 Electromagnetic compatibility appliances, electric tools and similar apparatus Part 1. Emission (CISPR
14-1.2001, IDT)
GB 4343.2-1999 Electromagnetic compatibility appliances, electric tools and similar apparatus Part 2. Immunity product
Class standards (idt, CISPR14-2.1997)
GB 4706.1-2005 household and similar electrical appliances - Safety - Part 1. General requirements (IEC 60335-1.2004, IDT)
GB T 4772.1-1999 rotary motor size and output power level Part 1 /. Frame 56 ~ 55 ~ 400 and the flange
1080 (idt IEC 60072-1.1991)
GB/T 4772.2-1999 rotary motor size and output power levels Part 2. Frame numbers 355 to 1000 and the flange
1180 ~ 2360 (idt IEC 60072-2.1990)
GB/T 4772.3-1999 rotary motor size and output power levels Part 3. low power built-in type motor flange No.
BF10 ~ BF50 (idt IEC 60072-3.1994)
GB 4824-2004 industrial, scientific and medical disturbance characteristics (ISM) radio equipment limits and measurement methods (CISPR
11.2003, IDT)
GB/T 4942.1-2006 protection (IP code) an overall structure of a rotating electric machine rating (IEC 60034-5.2000, IDT)
GB/T 5226.1-2002 Safety of machinery Electrical Equipment Part 1. General requirements (IEC 60204-1.2000, IDT)
GB/T 6113.101-2008 radio disturbance and immunity measuring apparatus specifications (CISPR16-1-1.2006, IDT)
GB/T 7064 turbine type synchronous motor technology requirements (GB/T 7064-2002, neqIEC 60034-3. 1988)
GB/T 13394-1992 letter symbols used in electrical technology symbol rotation amount of the motor (eqv IEC 60027-4. 1985)
GB/T 17948 (portions of) the rotary electric machine insulation Functional evaluation (IEC 60034-18 (portions), IDT)
GB 755-2008/IEC 60034-1.2004
GB/T 20113-2006 Electrical insulation (EIS) thermal fractionation (IEC 62114.2001, IDT)
GB/T 20161-2006 cage induction motors powered drive application guide (IEC 60034-17.2002, IDT)
GB/T 21210-2007 starting performance of single-speed three-phase cage induction motors (IEC 60034-12.2002, IDT)
GB/T 21211-2007 equivalent load of the rotary electric machine and overlay techniques - Indirect testing to determine temperature rise of the rotary electric machine
(IEC 61986.2002, IDT)
JB/T 7062-1993 Semiconductor converters connected to flag code (eqv IEC 60971. 1989)
JB/T 10098-2000 AC motor stator winding forming a voltage level of impact resistance (IEC 60034-15.1995, IDT)
High voltage test techniques IEC 60060-1 - Part 1. General definitions and test requirements
Safety of machinery Electrical machinery IEC 60204-11 Part 11. AC voltage or DC voltage 1000V 1500V
And a high voltage above 36kV or less required equipment
IEC 60027-1.1997 Letter symbols technology electrician - Part 1. General
IEC 60279. 1969 Measurement of AC charging motor winding resistance
IEC 61293 device power rating electrical safety requirements marker
3 Terms and Definitions
This uses standard GB/T 2900.25-2008 and the following terms and definitions.
And on cooling a cooling medium, in addition to 3.17 ~ 3.22, the rest see GB/T 1993-1993.
This standard "protocol" refers to the "agreement between the manufacturer and the user."
3.1
Typically the magnitude of a motor by the manufacturer under predetermined operating conditions specified.
Note. rated voltage or voltage range refers to the end of the line voltage or the rated voltage range.
3.2
A set of ratings and operating conditions.
3.3
Ration output value.
3.4
At a given moment, the value of the full charge is applied to the motor and the mechanical quantity by a circuit or mechanical means.
3.5
The motor is rotating (the others are normal operating conditions) output from the zero power.
3.6
Motor with its load rating runtime.
3.7
The magnitude of the motor full load operation.
NOTE. This concept applies to power, torque, current, speed and the like.
3.8
That the motor is neither motion nor a state of electrical or mechanical energy input.
GB 755-2008/IEC 60034-1.2004
3.9
Described a series of load condition of the motor is subjected, including starting, electric braking, idling, can be broken down and its duration and sequencing the like.
3.10
Continuous working system can be divided, short, periodic or aperiodic types. Cyclical work system comprises one or more of a predetermined duration
Load time constant; aperiodic the duty load and speed typically within permissible operating range of variation.
3.11
The duty cycle of the load (including starter and electric brake including) the duration of the entire cycle time ratio, expressed as a percentage.
3.12
The measured values of the motor at the minimum rated frequency, rated voltage and the rotational angle position of the rotor at all blocked on its axis of rotation generated torque.
3.13
The maximum steady-state current of the motor at rated frequency and the rated voltage of the rotor input from the power supply line in all angular positions blocked rms.
3.14
The motor at rated voltage, rated frequency, and zero rotation speed corresponding to the maximum torque generated by the torque steady asynchronous
Minimum.
This definition does not apply torque continuously increases with the decrease of the rotational speed induction motor.
NOTE. In certain rotation speed, in addition to the steady-state torque asynchronous, it will also work with the rotor angle generating harmonics as a function of the synchronous speed.
Under these speed correspond to certain power angle rotor acceleration torque may become negative.
Experience and calculations show that this is an unstable operating state, harmonic acceleration synchronizing torque of the motor does not interfere, may be excluded from this definition.
3.15
No steady state dump speed asynchronous motor maximum torque at rated voltage and frequency produced.
This definition does not apply torque continuously increases with the decrease of the rotational speed induction motor.
3.16
The maximum torque of the synchronous motor at rated voltage, the rated frequency and the rated field current, when the synchronous speed can produce.
3.17
One kind of heat transfer process, heat losses due to the motor is transmitted to the formation of the primary cooling medium, the medium can be exchanged continuously or
It is cooled in a cooler secondary cooling medium.
3.18
Gas or liquid heat transfer medium.
3.19
Gaseous or liquid medium temperature is lower than a motor member, which contact with the parts of the machine, and take away the heat which is released.
3.20
Temperature is below the primary cooling medium is a gas or a liquid medium, the primary cooling medium through the outer surface of the cooler or the heat released to the motor
GB 755-2008/IEC 60034-1.2004
The amount taken away.
3.21
One kind of winding, which is located inside the main cooling medium flows through the conductor insulation as the hollow part of the winding, the conduit, duct or channel, with the
Direct contact with the cooling section, regardless of its orientation.
3.22
Any other windings other than the winding directly cooled.
1) In any case, if not marked "indirect" or "direct" it means that the word is the indirect cooling coil.
3.23
In order to prevent individual insulated dielectric breakdown due to the main electric shock, in addition to increasing the main insulation.
3.24
Each infinitesimal mass element with the micro-objects to a predetermined distance from the axis (radius) of the product of the square of the sum (integral).
3.25
Motor temperature variation in the heat generating member is not more than 1h state of 2K.
3.26
May be substituted several separate time constants to determine a temperature approximately stepwise change in current changing process occurs after the inner winding.
3.27
Fully enclosed by molding an insulating or closed winding.
3.28
K fN
Under nominal conditions (averaged over the integration period a) the ratio of the maximum allowable RMS current Irms, maxN its mean IavN.
K fN = Irms, maxNIavN
3.29
Q i
Difference between the maximum value Imax and a minimum value Imin of fluctuations of its current Iav of 2 times the average (integrated average in one cycle) of the ratio of.
Q i = Imax-Imin2Iav
NOTE. The value of the current ripple is small, the ripple factor can be approximated by the formula.
Q i = Imax-IminImax + Imin
The calculation result q i is equal to or less than 0.4, the formula may be used for approximation.
3.30
Allowable deviation between the measured value of a nominal value and its quantity.
GB 755-2008/IEC 60034-1.2004
3.31
According to a test design and manufacture of one or several motors are conducted to demonstrate that the design meets certain criteria.
3.32
After the test was completed during manufacturing or each motor conducted to ascertain whether they meet the criteria.
4 Duty
Express duty of 4.1
Users have the responsibility to demonstrate duty. The user may indicate one of the following methods duty.
a) The numbers indicate the load constant or varies in a known manner;
b) with the amount of change in time sequence diagram;
c) selecting a desired degree of complexity is not below the operating system at the S1 ~ S10.
Type work system according to the provisions of 4.2, with a suitable abbreviation expressed written after the load value.
Users normally can not make the motor inertia (JM) or relatively warm life (TL), see Appendix A. The manufacturer shall provide such data.
When the user does not show working system, the manufacturer should be considered duty S1 (continuous duty).
4.2 Duty Type
4.2.1 S1 continuous duty duty ---
Thermally stable to keep running at a constant load state, shown in Figure 1.
This work referred system S1.
P --- load;
--- the PV electrical losses;
--- a temperature [theta];
θmax --- Maximum temperature reached;
FIG 1 S1 continuous duty duty
GB 755-2008/IEC 60034-1.2004
4.2.2 S2 working short-time working system ---
It runs at a constant load at a given time, during which time the motor is not sufficient to reach thermal equilibrium, followed by shutdown and de-energized for a time sufficient
So that the motor is cooled again to a difference of the cooling medium within 2K, shown in Figure 2.
This duty abbreviated as S2, followed by standard duration should be made to work.
Example. S260min
P --- load;
--- the PV electrical losses;
--- a temperature [theta];
θmax --- Maximum temperature reached;
FIG short-time work 2 work system S2
4.2.3 S3 intermittent duty cycle duty --- 2)
2) duty cycle during the load operation of the motor means does not reach thermally stable.
A sequence of identical work cycles, each cycle comprising a period of time can be constant load and a rest on and off, see
Figure 3. This duty, the starting current of each cycle will not have a significant effect on the temperature rise.
This duty abbreviated as S3, followed by duty cycle to be marked.
Example. S3 25%
GB 755-2008/IEC 60034-1.2004
P --- load;
--- the PV electrical losses;
--- a temperature [theta];
θmax --- Maximum temperature reached;
TC --- load cycle;
FIG 3 duty cycle intermittent duty S3
4.2.4 S4 working system includes a starter --- intermittent periodic duty 2)
A sequence of identical work cycles, each cycle comprising temperature rise period start time has a significant effect, constant load operation period
Row and a rest time and can break, shown in Figure 4.
This working system referred to as S4, then duty cycle to be marked and imputed to the motor shaft of the motor inertia (JM) and negative
Carrier inertia (Jext).
Example. S4 25% JM = 0.15kg · m2 Jext = 0.7kg · m2
GB 755-2008/IEC 60034-1.2004
P --- load;
--- the PV electrical losses;
--- a temperature [theta];
θmax --- Maximum temperature reached;
TC --- load cycle;
FIG 4 includes a starter duty cycle intermittent duty S4
4.2.5 S5 duty --- comprising electrical braking chopper duty cycle of 2)
Run as a series of identical work cycles, each cycle comprising a period start time, a period of constant load running time, some electric brake
And a rest time-energized and, Figure 5.
This working system referred to as S5, and then be marked with duty cycle calculated and normalized to a motor shaft of the motor moment of inertia (JM) and negative
Carrier inertia (Jext).
Example. S5 25% JM = 0.15kg · m2 Jext = 0.7kg · m2
GB 755-2008/IEC 60034-1.2004
P --- load;
--- the PV electrical losses;
--- a temperature [theta];
θmax --- Maximum temperature reached;
TC --- load cycle;
5 includes an electrical braking chopper duty cycle duty S5
4.2.6 S6 duty cycle --- continuous working system 2)
Run as a series of identical work cycles, each cycle comprising a period of time at constant load and no-load operation period of time, no downtime
And time-energized, shown in Figure 6.
This working system referred to as S6, then duty cycle to be marked.
Example. S6 40%
GB 755-2008/IEC 60034-1.2004
P --- load;
--- the PV electrical losses;
--- a temperature [theta];
θmax --- Maximum temperature reached;
TC --- load cycle;
FIG 6 consecutive periodic duty S6 duty cycle
4.2.7 S7 --- duty cycle of the electric brake includes a continuous working system 2)
Run as a series of identical work cycles, each cycle comprising a period start time, a period of time and constant load operating period of the electric brake
Time, non-energized time and downtime, see Fig.
This working system referred to as S7, then imputed to be marked on the motor shaft to the motor inertia (JM) and load inertia
(Jext).
Example. S7 JM = 0.4kg · m2 Jext = 7.5kg · m2
GB 755-2008/IEC 60034-1.2004
P --- load;
--- the PV electrical losses;
--- a temperature [theta];
TC --- load cycle;
Duty cycle = 1.
FIG 7 includes a continuous duty cycle of the electric brake system work S7
--- 4.2.8 S8 duty load comprising - a corresponding change in speed continuous duty cycle 2)
A sequence of identical work cycles, each cycle comprising a period of constant speed running at a prescribed time and a few paragraphs load
In other different time constant load running speed (e.g., multi-speed induction motors), and the non-energized time of shutdown, see Figure 8.
This working system referred to as S8, and then imputed to be marked on the motor shaft to the motor inertia (JM) and load inertia
(Jext) and the load, speed and duty cycle at each speed.
Example. S8 JM = 0.5kg · m2 Jext = 6kg · m2 16kW 740r/min 30%
40kW 1460r/min 30%
25kW 980r/min 40%
GB 755-2008/IEC 60034-1.2004
P --- load;
--- the PV electrical losses;
--- a temperature [theta];
θmax --- Maximum temperature reached;
--- speed like;
TC --- load cycle;
FIG 8 includes a load - corresponding change in speed of the continuous duty cycle duty S8
4.2.9 S9 --- duty load and speed changes for non-periodic duty
Duty load and speed for an aperiodic variation in the allowable range. This system comprises a regular work overload, its value can be much
Exceeds the reference load, shown in Figure 9.
This duty referred to S9.
For the concept of the present overload the duty, to select a single referenced S1 duty load suitable constant reference value (9 in FIG.
The "Pref").
GB 755-2008/IEC 60034-1.2004
P --- load;
Pref --- reference load;
--- the PV electrical losses;
--- a temperature [theta];
θmax --- Maximum temperature reached;
--- speed like;
9 for non-periodic load and speed changes S9 duty work system
4.2.10 S10 --- discrete duty load and speed constant duty
When including a specific number of discrete load (or equivalent load)/speed (if possible) operating system, to run each of the load/speed combination
Between the motor should be sufficient to reach thermal equilibrium, see Figure 10. Minimum load value at a duty cycle may be zero (no-load or down and de-energized).
Pu life TL. The expected thermal life of the reference value S1 is continuously working to develop the amount of their allowed limit temperature rise expected thermal life. stop
TL values should be rounded to the nearest multiple of 0.05. This parameter is derived on the meanings and values in Appendix A.
For the present working system, appropriately selected based on a constant load S1 duty load for the various discrete reference values (in FIG. 10 "Pref").
NOTE. discrete load values are generally determined by the integration time period equivalent load, each load cycle does not require exactly the same, only one cycle per
A load duration sufficient to allow the motor to stabilize, the duty cycle for each and can give the same relative quadrature expected thermal life.
GB 755-2008/IEC 60034-1.2004
P --- load;
--- PI constant load within a duty cycle;
Pref --- S1 based on the reference duty load;
--- the PV electrical losses;
--- a temperature [theta];
When the temperature of the reference load ref ---;
TC --- load cycle;
--- the difference ?? i in the winding of the load duty cycle of each of the temperature of the reference temperature;
----like speed.
FIG 10 discrete constant load duty duty S10
5 rating
5.1 Fixed selected
The manufacturer should be required of the selected rating 3.2. When selecting fixed, the manufacturer should be required in choosing a given 5.2.1 - 5.2.6
amount. Quota category shall be marked at the rated output. If there is no fixed categories, it is considered to be a continuous amount of work to develop.
When the access by the manufacturer as an integral part of the motor attachment (e.g., reactors, capacitors, etc.), operator should go to the electrical rating of the overall composition
The source terminal side.
NOTE. This does not apply the power supply connection between the motor and the power transformer.
When feeding the motor with static converter supply a predetermined or fixed, special consideration should be otherwise. GB/T 20161-2006 pair
GB/T 21210-2007 cage induction motors within the scope of the guidelines given application.
GB 755-2008/IEC 60034-1.2004
5.2 rating category
5.2.1 The amount of continuous work to develop
And a quota, in accordance with its provisions meet the requirements of this standard, the motor should be able to make long-term operation.
Such fixed duty corresponding to the S1, S1 duty flag likewise method.
5.2.2 The amount of short-term work to develop
And a quota when, at the same time meet all its specified requirements of this standard, the motor should be started at ambient temperature and a predetermined
Run within limits.
Such fixed duty corresponding to S2, S2 likewise duty flag method.
5.2.3 cycle to develop the amount of work
And a quota, meet their specified requirements of this standard, while the motor should run a specified duty cycle.
Such S3 ~ S8 correspond to the fixed duty, the method likewise flag corresponding working.
Unless otherwise specified, the duration of the duty cycle of 10min, duty cycle should be one of the following values.
15%, 25%, 40%, 60%
5.2.4 aperiodic amount of work to develop
And a quota, according to predetermined criteria while satisfying the requirements of this, the motor should be non-periodic operation.
Such S9 corresponding to the fixed duty, the method likewise flag S9 working.
5.2.5 discrete constant load and speed the development of the amount of work
And a quota, according to the provisions while meeting the requirements of this standard, the motor should be able to withstand the combined load and speed work system S10
Do the long run. Within a maximum allowable load on the duty cycle should take into account all parts of the machine, such as the relative expected insulation structure
Correctness exponentially thermal life, the bearing temperature, and thermal expansion of the other members. Unless other relevant national standards or IEC standards otherwise
Predetermined, maximum load should not exceed 1.15 times the reference duty S1 to the load values. Minimum load may be zero, in case the motor load
And can break or shutdown state. Such quota selection, see Appendix A.
Such fixed duty corresponding to S10, S10 flag method likewise working.
Note. Other relevant national standards or IEC standard allows winding temperature limit (or rise) substituted p.u. S1 based on the load of the maximum load duty.
5.2.6 equivalent load rating
One for the fixed predetermined experimental purposes, according to its predetermined, the motor can be operated at constant load while satisfying the requirements of this standard
Until thermal stability, the stator winding temperature rise same as the average temperature over a duty cycle of a predetermined duty.
NOTE. Equivalent Ration definition should account of changes in a duty cycle load, rotational speed and cooling.
Such as the use of such quotas should be marked as "equ".
5.3 rating category selected
General-purpose motor manufactured by the continuous work to develop turnover should have, and can operate at duty S1.
If the user does not indicate that duty, it is considered S1 duty, which is rated for continuous development of the amount of work.
The amount of short-time work for the development of the motor, it should be fixed duty S2 as a reference, see 4.2.2.
Or load of a variable load includes a motor load, and the break down of energy, which should be fixed to one of S3 ~ S8 duty as a reference
The amount of the development cycle work, see 4.2.3 - 4.2.8.
Also for speed change of load variation, comprising a carrier through the motor, which is fixed to S9 should be specified as a reference duty work aperiodic
Amount, see 4.2.9.
To a discrete constant load, comprising a load or overload (or broken down and energy) of the motor, which should be fixed to S10 as a reference duty
Discrete constant load rating, see 4.2.10.
5.4 output quotas of various classes
In determining fixed.
--- S1 ~ S8 for working system, which should be a constant value predetermined load rated o......
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