This standard specifies the types and basic parameters, requirements, test methods, inspection rules, marking, packaging, transportation and storage of low-voltage AC soft starters for mines (hereinafter referred to as soft starters). This standard is mainly applicable to thyristor voltage-regulated soft starters for three-phase AC asynchronous motors with rated voltages of 1140V (1200V) and below in coal mines. MT/T 943-2005 Low-voltage AC soft starters for mines MT/T943-2005 Standard download decompression password: www.bzxz.net

[CS 73.100.99
Request number: 15510-2835
Coal Industry Standard of the People's Republic of China
MT/T 943-2005
Low voltage AC soft starter for mining
L.ow vollage AC snft slarler For cnal mine2005-02-14 Issued
National Development and Reform Commission
2005-06-01 Actual bottle
Normative references
Type technical parameters
Test methods
Inspection rules
Marking, packaging, transportation and storage
MT/T943-—2005
MT/T 943—2005
This standard strictly follows the relevant provisions of GB3836.1-2CCE Electrical equipment for explosive gas environments: GB3836.2-200 Electrical equipment for explosive gas environments Part 3, GB3835.-2U0U Electrical equipment for explosive gas environments: "Safety type"> in terms of mine safety; technically and internally consistent with GB/T1404X, 1—20004 low Sichuan related equipment and control equipment general deletion GB/37S76E981 control equipment and part of the electronic control equipment equipped with electronic devices", CB/T3855.1-1!3 semiconductor rectifier small requirements of the national standards and other national standards.
This standard is proposed by the Science and Technology Development Department of the China Coal Industry Association. This standard is under the jurisdiction of the Special Equipment Standardization Technical Committee of the Coal Industry. This standard was drafted by the Shanghai Branch of the China Coal Research Institute and was drafted by the Shanghai Branch of the China Coal Research Institute and the China Dongfang Electromechanical Co., Ltd. Company, Xinjiang Lingchu Machinery Co., Ltd. signed and drafted.
The main contributors to this standard are Tong Zhonglan, Hao Feijian, Le Weiliang, Zhang Pianchao, Ni Chunming, and Wang Jinquan. 1 Scope
Low-voltage AC soft starter for mining
MT/T943--2335
This standard specifies the format and specifications, requirements, test methods, inspection specifications, marking, packaging, acceptance and storage of low-voltage AC soft starters (hereinafter referred to as soft starters). This standard It is mainly applicable to three-phase AC 5V motor thyristor soft starter with rated voltage of 114V and below in coal mines. Www.bzxZ.net
2 Normative reference documents
The following ten clauses become clauses of this standard through reference in this standard: For all reference documents with a date, their subsequent revisions, including the contents of the revisions, shall not apply to this standard. However, according to this standard, the parties shall reach an agreement to study whether the latest versions of these documents can be used. For all reference documents without a date, their extended versions shall apply to this standard. 6T2aa standard ground moisture level (egEC-60661GB/T2423.12001 electrical and electronic products environmental test Part 1: component light 4: low index: id11C60068 2 1,150)
GHr 2423. 2-2001
6006822.1974)
Electrical and electronic products environmental testing: Part 2: Test method: commercial leakage (: FCGH/T2423.4-19
Medium three-rate products: this ring end test load procedure test verification h alternating damp heat test method (eF 68-9-90:19807
GB 3836.—2000
Electrical apparatus for explosive gas atmospheres Part 1: General requirements e0C65079-5: 1938) GB3836.22000
GB 383t. 4—2000
Electrical apparatus for explosive gas atmospheres Part 2: Two explosions" e016C079: 1333! Electrical apparatus for explosive gas atmospheres Part 4: This safety type \" (c9-IEC63573--: GB, T 14048 1 2e00 Low-voltage equipment and exhaust equipment general rules eg LC: 50547-1:1600>C+B14248.4-2503 Low-voltage switchgear and control equipment Electromechanical contactor Motor starter (eV【E50971:2000)
MT-8 Explosion-proof low AC vacuum electromagnetic starter for protection M17T1=4.21995 Coal mine electrical equipment sales product No. 4 control method rental consultation method MT175-1988 Electronic protector for mine explosion-proof electromagnetic starter MT1151995 Combustion-type electrical equipment false pressure connection wall M: T6e11997: General technical equipment for underground power supply in coal mines 3 Types and basic parameters
3.1 Type
Divided into production type with energy-saving and safety vehicle quality according to the room 3.2 Basic parameters
Rated voltage: 80.660, 1140V
Rated current: in line with (B/T7 from 2 to 2002 unless otherwise specified in the product standard) Rated frequency, 50Hz;
Electricity over-cut multiple: 1.
MTT 943—2005
3.3 Model
According to the provisions of MT/T154.21906, the composition and formula are as follows:
4 Requirements
4.1 General provisions
Characteristic code (with electromagnetic actuator function\Z\: no note if without this function)
Electromagnetic actuator, unit is volt (V)
Rated voltage unit is ampere (A)
Professional code
Second characteristic code (for micro-starting\R\) The first characteristic code is flameproof type (B), the explosion-proof and intrinsically safe type is (Q) product type code (starter type). 4.1. The soft starter shall comply with the requirements of this standard and be manufactured in accordance with the model drawings and documents approved by the explosion inspection unit designated by the state. 4.1.2 The soft starter shall comply with the relevant provisions of GH3836.1-2U00.CB38,2-2000 and GB5836.420CC. Obtain the fire protection certificate issued by the fire protection inspection unit designated by the user. 4.1.3 The technical specifications of the components of the soft starter (tube, vacuum contactor, isolating switch, transformer, circuit breaker, etc.) shall not only meet the requirements of the above standards, but also meet the requirements of their respective standards. 4.2 Environmental conditions The soft starter shall be able to work reliably under the following conditions: The altitude of the installation site shall not exceed 2 cm. The ambient temperature shall be 4°C to -4°C, and the humidity shall not be too high. In places with explosive atmospheres of methyl methacrylate or methyl methacrylate; In places with corrosive gases around metal and insulating materials; The environmental pollution level shall be Class III; The installation category shall be Class III. The voltage waveform shall be constant: The voltage fluctuation shall not exceed about 1% of the rated value; The frequency fluctuation shall not exceed 12% of the rated value; The phases shall be opposite to each other, and the negative phase component or phase sequence component of the two phases shall not exceed 5% of the positive phase sequence component. 4. 3 Electrical distance and creepage distance 4. 3. 1. The electrical distance determined by the relative phase voltage of the soft starter in the main chamber should not be less than the relative phase voltage specified in Table 1 and the relative phase voltage obtained in the system rated voltage in Table 1 (effective value of the relative phase voltage obtained in the rated voltage of the electrical room) Table 1 (system) V 300-2600 600:1 X 1000-1200 Creepage distance in the main chamber MT/T 943—2005
Electrical room
Soft starter rated insulation voltage or working voltage Le modified material group determined by the minimum creepage distance less than the provisions of Table 2. Table 2
Specified by the pen or working
public review)
Usually out of the distance
I: Pen sealing materials can be divided into the following four groups according to their relative electrical index: T 4X0sCTI-5G
M..175:CT1-.400
m.:150.C)-175
4.3.3 Electrical distance and current limiting distance of wiring chamber
The electrical distance and current limiting distance of wiring chamber shall comply with the provisions of GB3836.22000 Appendix C.3.4.3.4 Intrinsically safe circuits and intrinsically safe circuits The electrical distance and creepage distance of intrinsically safe circuits shall comply with the provisions of GB33836.4.200 6.3.6.4.4.1 Insulation resistance
The insulation resistance between the live circuit and the tower in the soft starter, and between each live circuit (except semiconductor components) shall meet the requirements of MT/61SS for the voltage A. The net final resistance is used as the soft starter component for the test. 4. 4. 2 Dielectric strength
The live circuit of the soft starter shall be able to withstand the voltage specified in Table 3. The dielectric properties of the safety circuit of the soft starter shall meet the relevant provisions of H3%36,4-200.
Huadian Electronics
580-43809
X0 (5, E 20
Total test voltage AC limit in effective delay)
The unit is
MI/T943-2C05
4.5 Soft start characteristics
4.5. 1. No-load performance || tt || When the motor is no-load, the soft starter's rated voltage should be within 75%--170% of the rated voltage range: the soft starter should be able to start the motor smoothly, and when the motor speed reaches or exceeds the rated speed, it can reliably leave the soft start state and send the output directly to the loaded motor. The starting time of the soft starter is adjustable within 60, and the motor acceleration time shall not be less than 654.5.2 Load performance
When the motor is rated load, the starter control voltage is rated. The soft starter should start the motor stably. When the motor reaches or exceeds the rated speed, the contactor power supply voltage is directly sent to the load. Within 60 after the soft starter is started, the motor speed shall not be less than 6, and the motor speed shall not exceed 234.6 Frequency starting
Under the specified load: start within 12 hours, the soft starter can work stably and reliably, and the temperature rise of the module shall not exceed the specified value of 13.
4.7 The contactor connection and disconnection capacity of the soft starter 4.1 The contactor should have the connection and disconnection capacity specified in Table 4. Table 4
Connection conditions
co50.05i test times
On-off performance
29wc, 05 discharge number
The test limit
time,
each power-on
Note 1: The test within the specified working range in the table is for full working voltage (core is the re-voltage test ()
ratio 2, the connection test in the table will be tested 35 times under 7 light and 10 practice ambient voltage. 3: The measured value is small and the suitable time does not need to exceed 1. If the single end is completely closed before disconnection, the allowed time is + c..
2 The contactor in the starter with electromagnetic energy should have the specified connection and disconnection capacity. 4.7.2
Application category
Mold pool: Electrical
Provisions
On and off strips
Suitable time
Run-in time
Operating civil Number
sit! , I is the rated electrical energy AI is the test current (A: 1V is the rated electrical history V. is the test voltage (V! is the quick voltage: V). Note 2: The listed values ​​are the minimum values, and the suitable electrical connection time is not reached! 2 If the head is completely closed before or after opening, the maximum power-on time can be extended. Note 3, the relationship between the time interval of the disconnection liquid in CL/14043.1-20U3 is applicable to the old factory. Note: it can also be used for the time required for the start-up.
method 4: U/, the error type is 5 deaths
is 5: the connection item is verified. If the manufacturer relies on it, the speed of the wine is selected by a smart engineer. Please report the work to the ring side 5 times, of which the time is 11%, 2 exchanges are 75M..
4.8 The non-cost operation performance of the soft starter The non-cost operation performance of the soft starter should comply with the provisions of MI111-198 7.2.3.2.1, 4
4. 9 Mechanical life
The mechanical life of the soft starter under normal conditions is (expressed in hundred times): 0.1, 0.3, 1.3.6, 20.4.10 Electrical life of the contactor in the soft starter
MT/I943—2005
The electrical life of the contactor in the soft starter under normal conditions is (expressed in ten thousand xin), 1.3.G, and the test conditions are specified in Table 6. Table
Other three-terminal
Slip electromagnetic starter power 4.11.1 If the soft starter housing adopts a shutter structure, there must be a mechanical interlock between the soft starter and the isolation housing to ensure that when the vehicle needs to be closed and the two circuit breakers are set, the main chamber can be opened. When the main chamber is opened, the normal operation method cannot make the passage closed. There is no obvious warning sign on the housing with screw control. The connection and disconnection of the isolation switch should be clear and reliable. The isolation switch should be able to change the phase sequence. There should be a reliable interlock between the isolation switch and the circuit breaker to ensure that the circuit breaker can only be turned when the circuit breaker is disconnected. 4. 11.A The switching position must have the required breaking capacity. Table 2
2050=0.05
4.11.6 The life of the machine is 10,000 times as shown in: 0.1,0,3,C.8.1.6 and the protection characteristics of the soft reverser with electromagnetic starter function 4.12
Number of tests
Consultation
Correct three times
4.12.1 The starter should have short-circuit protection performance, and its performance should meet the requirements of 7.2.11 in 4T111-159%. 4.12.2 When the thermal relay is used as reverse installation for European starting, its characteristics shall meet the requirements of the table: When the overload and phase failure protection are used for the overload and phase failure protection, its characteristics shall meet the requirements of 5.2.1 and .2.3 of MT175-19K.
rated current
action time
2h no action
can be operated at the same time,
over-training state
society: the electrical appliance can be adjusted by two times the rated current, and the electrical appliance can be safely operated for a long time after the rated current is supplied.
MT/T 943—2DC5
2.13 Precision electric cathode protective film
or electric courtyard
setting current
third phase
2h no action
4.13.1 The starter should have leakage lockout protection performance. When the main automatic battery insulation resistance drops to the minimum specified by 12, the main circuit should be deeply locked. When the insulation resistance of the second circuit to the ground rises to the specified When the rated action value is 1.5 grids, the main circuit should be released and the single-phase power loss locking system should be set in Table 3. 4.13.2 The starter has a terminal power detection path and can be equipped with no leakage discharge protection device. 4.14 The temperature rise of the starter control coil and the power supply control transformer can not exceed the value in the table! ! The temperature rise limit value of the line and the temperature rise limit value of the switch block and the easily accessible parts should not exceed the value in Table 13. The temperature rise limit of other parts is limited to not damaging the normal operation of the connected or adjacent parts. Temperature rise test parts:
Control 4 power supply is rated positioning:
Main power is passed to determine the heating current:
Special components related to heating should be selected when seeing the large heating image, Table 11
Standard material level
The temperature rise obtained by the resistance method exceeds the limit
Treatment: The combination and service environment activity are determined for the construction of the environment. The use conditions of the two low-voltage test are designed. Our product can be upgraded according to the limit. The type of training material used can be sufficient for the working year: The group virtual library certificate table 12
Product exhibition supervision block
Deep-effect swimmer
The mother of the fast device is solid
A light low-voltage device is connected
Short, slow training
4.15 Alternating damp heat performance
MT/T943—2005
The soft starter shall be subjected to an alternating current performance test with a high short-term of 10 and a duration of 121. Within 33 minutes after the test, the soft starter shall be subjected to a dielectric performance test with a dielectric strength of 100% or more specified in 4.4.2. The test shall be conducted for 10,000 hours or more without insulation or flashover. The starter surface shall be free of corrosion. 1.15 High and low temperature performance
The electronic components in the soft starter shall be able to withstand a low-temperature test with a severity level of 5°C for 2h, a high-temperature alcohol absorption test with a duration of 4521, and a high-temperature alcohol absorption test with a duration of 4521. 17 High and low storage requirements
The starter should be able to withstand the severe level 7UY, 72h high temperature storage test and the product level 40, 72h low temperature storage test. The product should meet the requirements of Article 4.5 of this standard when measuring the ambient temperature of the test room.13 Requirements for anti-electromagnetic interference
Except for the enterprise product standards, according to the provisions of 7.3.2 in (T3/T14C48.1-2009. 4.19 Anti-corrosion and anti-loosening
The black parts of the soft starter can be anti-corrosion except for the surface of the soft starter. The surface of the parts should be smooth and free of bubbles, cracks and pits. 4.26 Firmware
All the settings, controls and terminals of the device shall be equipped with measures to prevent loosening. 4.21 Explosion-proof performance || TT || The explosion-proof connection of the soft starter, the filling and surface of the joint shall comply with the requirements of (H3836, 2--2000 Section 5), and shall be able to withstand the shell pressure test and the internal combustion test specified in 3836.2223:3, and 15,2. The quality safety design and manufacturing shall comply with CE3836.4-2JJ and pass5.21 Impact test of components
Impact test of components shall be carried out in accordance with 23.2.3.1 of GB3835.1-2000. 5.22 Anti-welding performance test
Explosion-proof performance test shall be carried out in accordance with 23.2.3.1 of GB3835.1-2000. 5.23 Shell pressure test
Filling test shall be carried out in accordance with 15.1 of GB3336.2-2000. 5.24 Torsion test of single-piece casing
Connector test shall be carried out in accordance with 23.4.5 of GB3536.1-2000.
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