Type, classification, grade, gb, installation method and parameter explanation of explosion-proof motor

Type of explosion-proof motor - letter meaning

At present domestic explosion-proof motor models are various, it is difficult for non-professionals to identify, what do these letters and Numbers represent?What are the parameters printed on the nameplate of the explosion-proof motor?In order to help you solve this problem, we have compiled and edited a lot of explosion-proof motor model, classification, protection level, gb parameters, installation methods and other explosion-proof motor data for your reference.

Explosion-proof motor

Type of explosion-proof motor, in which the letter represents the meaning.

Y- stands for "asynchronous motor";

B- stands for "flameproof";

X- stands for "high efficiency"

2- product design serial number, indicating the second design;

3- product design serial number, indicating the third design;

YB- stands for "flameproof asynchronous motor";

A- represents the increased "safety" type;

K- product characteristic code, indicating special use for mine;

YA- represents the increased safety asynchronous motor

F- stands for "ventilation" and "dust". For example, YBF stands for flameproof asynchronous motor for fan and YFB stands for dust flameproof motor

S- stands for "water" cooling and "feed" motor, such as YBS for flameproof asynchronous motor for conveyor and YBSS for flameproof asynchronous motor for conveyor.

EExd- flameproof motor.

EExe- booster motor.

(EExd and EExe are the two most commonly used types of explosion-proof motors, and EExd has a higher application environment than EExe.)

Example of motor frame size:

For example: ybx3-355m1-4w explosion-proof motor model

Y -- asynchronous motor;B -- flameproof type;X -- high efficiency;3 -- third-generation explosion-proof motor (design serial number);355 -- center height 355MM;M -- middle frame;1 -- intimate length no. 1;4 -- number of electrodes;W -- special code (outside type)

Type of explosion-proof motor

IEC explosive-proof grade standard format: Ex Ⅱ C T4 (ia)

E: according to CENELEC logo;Ex: explosion-proof public mark;IA: explosion-proof type (intrinsically safe) Ⅱ: equipment category;C: gas group

Ii. Explosion-proof motor standards - production standards (gb)

Explosion-proof motor must be equipped with explosion-proof certificate, explosion-proof motor is mainly used in coal mine, petroleum and natural gas, petrochemical and chemical industry.

The rated voltage, rated current, power and speed of the explosion-proof motor are the same as those marked by the ordinary motor, that is, the explosion-proof motor has more explosion-proof marks: Ex

Explosion-proof type + equipment type + (gas group) + temperature group explosion-proof.

The explosion-proof certificate is generally issued by the state department, and the authenticity and validity of the certificate can be verified on the network. For relevant factories, this certificate is also required to ensure the safety and qualification of the explosion-proof motor.

China's explosion-proof grade standard is "gb3836.1-2000 electrical equipment for explosive gas environment ", which will be supplemented or modified by the following special standards for explosion-proof types.

Electrical equipment for use in explosive gas environments - part 2: flameproof "d"

Electrical equipment for use in explosive gas environments - part 3: safety "e"

Electrical equipment used in explosive gas environments - part 4: intrinsically safe "I"

Electrical equipment for explosive gas environments - part 5: positive pressure "p"

Electrical equipment for the environment of explosive gases - part 6: oil-filled "O"

Electrical equipment for use in explosive gas environments - part 7: sand-filled "q"

GB 3836.9 electrical equipment for use in explosive gas atmospheres - part 9: encapsulated "m"

GB 7957 mine helmet lamp

The above standards and this standard are not applicable to medical electrical equipment, detonator, detonator tester and ignition circuit tester

As for the "EX2DB4" you mentioned, I really haven't seen a standard similar to yours. I suspect that you copied this model or symbol by mistake.

Common symbols for "Exd Ⅰ/Ⅱ BT3"

"Ex" is a universal symbol, representing thermonuclear force

"D" means "flameproof type ".

"Ⅰ" or "Ⅱ" said electrical equipment classification, Ⅰ for coal mine electrical equipment, Ⅱ for explosive gas environment with other equipment in addition to the coal mine. Among them, the flameproof Ⅱ class "d" and "intrinsically safe" I "is divided into electrical equipment Ⅱ A, Ⅱ B and Ⅱ C." T3 "said temperature classes. The specific classification and meaning, see" GB3836.1-2000 electrical equipments used in explosive gas environment ".

Explosion proof certificate

Authorized by the state administration of quality supervision, inspection and quarantine administration of quality supervision, inspection and authorized by the state administration of * * production production serie a testing inspection institutions, it is by the conformity assessment (CNAS) national approval committee of China and China national accreditation supervision and management committee (CNCA) authorized by the national anti-explosive electric products quality supervision and inspection center, is also the national import &export commodity inspection laboratory accreditation committee approved the import and export explosion-proof electrical products validation test units;

Technical conditions for flameproof three-phase asynchronous motors for coal mine - part 1: YBK2 series flameproof three-phase asynchronous motors for underground coal mine (frame size 100 ~ 315)

Technical conditions for YBD2 series flameproof variable pole multi-speed three-phase asynchronous motors (frame size 80 ~ 280)

3 JB/T 6201-2006 YBDC2 series flameproof capacitor starting single phase asynchronous motor (frame size 71 ~ 132) technical conditions

Technical conditions for YW series non-spark three-phase asynchronous motors (frame size 80 ~ 315)

General technical specification for safety performance of flameproof low-voltage three-phase asynchronous motors used in coal mines

Technical conditions for flameproof three-phase asynchronous motors - part 2: yb2-w, yb2-th, yb2-thw, yb2-ta, yb2-taw series flameproof three-phase asynchronous motors (frame size 63 ~ 355)

7 JB/T 10352-2002 YFB series dust-proof three-phase asynchronous motors (frame size 63 ~ 355) technical conditions

Technical conditions for flameproof motors for fuel oil tankers - part 1: flameproof three-phase asynchronous motors for YBJY series fuel oil tankers (frame size 63 ~ 100)

9 JB/T 7565.4 2004 flameproof three-phase asynchronous motor technical conditions part 4: series YB2 flameproof (Exd Ⅱ CT1 ~ T4) three-phase asynchronous motor (stand no. 63 ~ 355)

Technical conditions for flameproof three-phase asynchronous motors - part 5: flameproof three-phase asynchronous motors for YBF2 series fans (frame size 63 ~ 355)

Mine flameproof two-speed three-phase asynchronous motor

YBRB series flameproof three-phase asynchronous motors for pumping stations

Reliability evaluation method for flameproof three-phase asynchronous motors (laboratory method) (internal use)

Interim provisions for the manufacture and inspection of soft connection structures for junction boxes of explosion-proof motors

Technical conditions for YB2 series high-voltage flameproof three-phase asynchronous motors (frame size 355-560)

Technical specifications for flameproof three-phase asynchronous motors -- part 7: flameproof three-phase asynchronous motors for YBGB2, ybgb2-w series pipeline pumps and outdoor pipeline pumps (frame sizes 80 ~ 315)

Technical conditions for flameproof three-phase asynchronous motors - part 6: yb2-h series Marine flameproof three-phase asynchronous motors (frame size 63 ~ 355)

18mt 902-2002 electric bolt drill motor for coal mine

Technical conditions for flameproof three-phase asynchronous motors - part 1 :YB2 series flameproof three-phase asynchronous motors (frame sizes 63 ~ 355)

Evaluation method for reliability index of flameproof components of flameproof three-phase asynchronous motor (laboratory method) (internal use)

Specification for flameproof three-phase asynchronous motors - part 3: yb2-f1, yb2-wf1, yb2-f2, yb2-wf2 series anticorrosive, outdoor anticorrosive flameproof three-phase asynchronous motors (frame size 63 ~ 355)

Grade of explosion-proof motor - explosion-proof principle

1. Concept of explosion

In a very short period of time, a large amount of energy is released, resulting in high temperature, and a large amount of gas is released, resulting in a chemical reaction or state change at high pressure in the surrounding medium.The rapid release of energy will cause the surrounding objects to be subjected to violent impact and destruction.

Explosive substances: substances capable of reacting with oxygen (air), including gases, liquids and solids.(gases: hydrogen, acetylene, methane, etc.Liquid: alcohol, gasoline;Solid: dust, fiber dust, etc.2) oxygen: air.3) ignition source: including open flame, electrical spark, mechanical spark, electrostatic spark, high temperature, chemical reaction, light energy, etc.

2. Reasons for explosion protection

Explosive material: many production sites produce certain combustible materials.About two-thirds of underground coal mines contain explosive materials;In the chemical industry, more than 80% of the production plant areas have explosive materials.Oxygen: oxygen in the air is everywhere.Ignition source: a large number of electrical instruments in the production process, a variety of friction electric sparks, mechanical wear sparks, electrostatic sparks, high temperature and other inevitable, especially when the instrument, electrical failure.Objectively, many industrial sites meet explosion conditions.When the mixture concentration of explosive material and oxygen is within the explosion limit range, an explosion will occur if there is an explosion source.So it is necessary to take the explosion protection.

3, explosion-proof marks - safety factor

The explosive dangerous medium in the factory or mining area is scientifically classified and classified according to its ignition energy, minimum ignition temperature and the time cycle of explosive dangerous gas in the field, so as to determine the explosion-proof mark and explosion-proof form of the explosion-proof equipment in the field.

Explosion-proof mark format:

The Ex Ⅱ C T4 (ia)

Explosion-proof mark explosion-proof grade gas group temperature group

Explosion-proof class description:

Ia level:

Electrical equipment that cannot ignite an explosive gas mixture during normal operation, one fault and two faults.

When working normally, the safety factor is 2.0;

In case of a fault, the safety factor is 1.5;

In case of two faults, the safety factor is 1.0.

Note: contacts with sparks shall be equipped with flameproof housing, airtight housing or double to improve safety factor.

The ib level:

Electrical equipment that cannot ignite an explosive gas mixture in normal operation and in case of a fault.

When working normally, the safety factor is 2.0;In case of a fault, the safety factor is 1.5.

During normal operation, contacts with sparks shall be protected by flameproof housing or airtight housing, and have the measures of fault self-display. The safety factor in case of a fault is 1.0.

Motor explosion-proof grade - protection grade (IP)

Explosion-proof motors can be divided into two categories:

Ⅰ class: the coal mine electrical equipment;

Ⅱ class: in addition to underground coal mines, all of the other electrical equipments used in explosive gas environment.

Ⅱ class and can be divided into A and B Ⅱ Ⅱ Ⅱ class C, sign Ⅱ B equipment can be applied to Ⅱ used conditions of equipment;Ⅱ C can be applied to the use of A and B Ⅱ Ⅱ conditions.

Description: Ⅱ C mark is higher explosion-proof grade, but it doesn't mean the equipment performance is best.

Maximum surface temperature: the maximum temperature reached by any part of the electrical equipment that may cause ignition in the surrounding explosive environment when the electrical equipment is operating under the most unfavourable operating conditions within the specified range.The highest surface temperature shall be below the combustible temperature.

For example, if the ignition temperature of explosive gas in explosion-proof sensor environment is 100℃, then the highest surface temperature of any part of the sensor should be lower than 100℃ in the most severe working state.

Temperature group:

T1

T2

T3

T4

T5

T6

450 ℃

300 ℃

200 ℃

135 ℃

100 ℃

85 ℃

Gas temperature division:

group

Safe surface temperature

Common explosive gas

T1

450 ℃ or less

Gas, acrylonitrile and other 46

T2

300 ℃ or less

47 kinds of acetylene, ethylene, etc

T3

200 ℃ or less

Gasoline, butenal and other 36 kinds

T4

135 ℃ or less

Acetaldehyde, tetrafluoroethylene and other 6

T5

100 ℃ or less

Carbon disulfide

T6

85 ℃ or less

Nitric acid ethyl ester

The explosion-proof grade of the motor consists of three parts

1) divide the safety level of different electrical equipment in the explosive gas area (zone 0, zone 1 and zone 2).For example, the selection of rotating motor is divided into flameproof type (code d), positive pressure type (p), increased safety type (e) and non-spark type (n).

2) gas or steam explosive mixture grade division, is divided into A and B Ⅱ Ⅱ, Ⅱ C three, these grades division is mainly in accordance with the maximum experimental safe gap (mesg) or (MICR) to differentiate between the minimum ignition current.

3) the division of the temperature grouping of the ignition medium.Mainly divided into t1-450 ℃

Protection level:

0 no test shall be conducted for non-protective motor without special protection, but it shall comply with clause 2.1

1. The motor with a shield of more than 50MM solid can prevent large area of human body from accidentally touching or approaching live or rotating parts in the shell.It can prevent solid foreign body with diameter more than 50MM from entering the shell

2. The motor with a diameter greater than 12MM can prevent solid foreign bodies with a diameter greater than 12MM from entering the shell

The motor with a diameter greater than 2.5mm can prevent tools or wires with a diameter greater than 2.5mm from touching or approaching live or rotating parts in the shell

(4) protection of motors with solids greater than 1MM can prevent wires or strips with diameters or thicknesses greater than 1MM from touching or approaching live or rotating parts in the shell

The dustproof motor shall have no harmful effect when it is subjected to splashing water in any direction

No special protection for motor

1. There should be no harmful effect of vertical dripping of drip proof motor

When the motor tilts from its normal position in any direction to any Angle within 15 degrees, the vertical dripping shall have no harmful effect

There should be no harmful effect on water spraying within the range of 60 degree Angle between the water-proof motor and the vertical line

4. The splash proof motor shall have no harmful effect when it bears the splash in any direction

The water-proof motor shall have no harmful effect on the water spraying in any direction

When the wave-proof motor is subjected to the impact of violent waves or strong spraying water, the inflow of the motor should not reach the harmful degree.

When the motor is immersed in the water at a specified pressure for a specified period of time, the water inflow of the motor shall not reach a harmful degree

Submersible motor the motor can be submerged for a long time under the conditions specified by the manufacturer.Motors are generally watertight, so water may be allowed to enter certain types of motors, but not to a harmful degree

For industrial applications, the protection level is generally IP65, with the highest level IP68. However, the protection level IP54 belongs to the lower level. IP is the marker letter, the number 5 is the first marker number, and 4 is the second marker number.

The serial number

Explosion-proof type

Code name

The national standard

Explosion-proof measures

Applicable area

1

flameproof

d

GB3836.2

Isolate existing ignition sources

Zone1, Zone2

2

Increased safety type

e

GB3836.3

Try to prevent ignition

Zone1, Zone2

3

The Ann model

ia

GB3836.4

Limit the energy of the ignition source

Zone0-2

The Ann model

The ib

GB3836.4

Limit the energy of the ignition source

Zone1, Zone2

4

Positive pressure type

p

GB3836.5

The dangerous material is separated from the ignition source

Zone1, Zone2

5

Oil filled type

o

GB3836.6

The dangerous material is separated from the ignition source

Zone1, Zone2

6

Sand mold filling

q

GB3836.7

The dangerous material is separated from the ignition source

Zone1, Zone2

7

No spark type

n

GB3836.8

Try to prevent ignition

Zone2

8

Encapsulation type

m

GB3836.9

Try to prevent ignition

Zone1, Zone2

9

Airtight type

H.

GB3836.10

Try to prevent ignition

Zone1, Zone2

Four, explosion-proof motor classification - classification methods

1.According to the principle of the motor

It can be divided into explosion-proof asynchronous motor, explosion-proof synchronous motor and explosion-proof dc motor.

2.According to use place cent

It can be divided into coal mine underground explosion-proof motor and factory explosion-proof motor.

3.According to the explosion - proof principle

It can be divided into flameproof motor, increased safety motor, positive pressure motor, non-spark motor and dust explosion-proof motor, etc.

4.According to the supporting equipment classification

Can be divided into the coal mine conveyor with explosion-proof motor, coal mine hoist with explosion-proof motor, rock loader use explosion-proof motor, coal mine local fan used explosion-proof motor, valve with explosion-proof motor, fan with loud explosion-proof motor, Marine explosion-proof motor, lifting metallurgical explosion-proof type and hydrogenation device matching with increased safety brushless excitation synchronous motor, etc.In addition, it can be divided according to rated voltage, efficiency and other technical indicators, such as high voltage explosion-proof motor, high efficiency explosion-proof motor, high slip explosion-proof motor and high starting torque explosion-proof motor.

5. Classification of explosion-proof motor operation area - dangerous area

1. Classification of dangerous areas

Zone 0: explosive gas always or for a long time

Zone 1: flammable gas may occur or exist during normal operation

Zone 2: flammable gases are generally not present and, if they do occur occasionally, are short-lived

Classification of explosive zones and comparison between international standards and American standards

I.E.C. N.E.C.

Gas Zone 0 Class I, Division I

Zone 1 Class I, Division I

Zone 2 Class I, Division II

Dust Zone 10 Class II, Division I

Zone 11 Class II, Division II

I.E.C. : international Electrotechnical Commission

N.E.C. : National Electrical Code, U.S.A.

2. Explosion-proof classification of electrical components

1. General protection EN50.014

2. Oil immersion protection 0 EN50.015

3. Charging protection facilities p EN50.016

4. Add powder q EN50.017

5. Flame retardant shell d EN50.018

6. Improve the safety factor

7. Safety protection I EN50.0120

8. Air tightness protection h is not unified

9. Pressure flower protection n is not unified

10. Special measures s are not unified

3. Allowable temperature area for electrical equipment

Maximum allowable value of element surface temperature (°C) gas ignition point (°C)

Vi. Installation mode of explosion-proof motor -- common installation mode

Installation of explosion-proof motor

Type of explosion-proof motor installation method table

The common installation methods of explosion-proof motors are: B3, B5, B34 and B35.

Code B3: the bearing is of two end caps;Seat: base foot;Shaft extension: with shaft extension;Type of installation: installed on the infrastructure.

B5: the bearing is of two end caps;Frame: no foot;Shaft extension: with shaft extension;Installation type: borrow flange installation.Structural features: end cover with flange, flange with through hole, flange at D end.

B35: the bearing is of two end caps;Seat: base foot;Shaft extension: with shaft extension;Installation type: the base foot is installed on the foundation member and the flange is used for installation.Structural features: end cover with flange, flange with through hole, flange at D end.

B34: the bearing is of two end caps;Seat: base foot;Shaft extension: with shaft extension;Installation type: the base foot is installed on the foundation member, and the flange is installed on the plane.Structural features: the end cover is provided with a flange, the flange is provided with a screw hole cake with a stop, and the flange is at the D end.