MT 210-1990 English PDF (MT210-1990)

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MT 210-1990: Electrical and electronic products for coal mine - Communication, testing and control - Basic test method
MT 210-90 (MT 209-1990)
MT
INDUSTRY STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
MT 210-90
Electrical and electronic products for coal mine
communication, testing and control –
Basic test method
ISSUED ON. APRIL 4, 1990
IMPLEMENTED ON. DECEMBER 1, 1990
Issued by. National Energy Administration
3. No action is required - Full-copy of this standard will be automatically and
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Table of Contents
1 Subject content and scope of application ... 4
2 Reference standards ... 4
3 General provisions ... 5
4 Test conditions ... 6
5 General inspection ... 7
6 Performance indicator test ... 8
7 Insulation resistance detection ... 8
8 Power frequency withstand voltage test ... 9
9 Water pressure test ... 10
10 Power fluctuation adaptability test ... 11
11 Surface temperature measurement ... 11
12 Thermal stability test ... 12
13 Thermal drastic change test ... 13
14 Enclosure impact test ... 14
15 Drop test ... 16
16 Enclosure protection performance test ... 17
17 Rubber material aging test ... 17
18 Leading in device clamping test ... 18
19 Leading in device sealing performance test and mechanical strength test19
20 Connector twisting test ... 21
21 Cable pull-out test ... 22
22 Determination of surface insulation resistance ... 22
23 Working environment temperature test ... 23
24 Storage ambient temperature test ... 24
25 Vibration test ... 25
26 Impact test ... 26
27 Transportation test ... 27
28 Damp heat test ... 28
29 Anti-interference test ... 29
30 Reliability test ... 29
31 Strength test and explosion proof test ... 29
32 Intrinsically safe spark test ... 29
Annex A Detection method for surface flashover and leakage current increase
in pressure resistance test (supplementary) ... 30
Additional information... 31
Electrical and electronic products for coal mine
communication, testing and control –
Basic test method
MT 210-90
This Standard is used in conjunction with MT 209 “Electrical and electronic products
for coal mine communication, testing and control - General technical requirements”
and MT 211 “Electrical and electronic products for coal mine communication, testing
and control - Quality inspection rules”.
1 Subject content and scope of application
1.1 This Standard specifies the basic test method for electrical and electronic products
for coal mine communication, testing and control.
1.2 This Standard applies to.
a. Coal mine communication, signal system and equipment;
b. Monitoring, control, regulating system, equipment and instrumentation for coal
mine infrastructure, production process and environment;
c. Measurement and control equipment and instrumentation for electromechanical
equipment in coal mines.
2 Reference standards
GB 531 Test method for hardness of vulcanized rubber shore A hardness
GB 998 Basic testing methods of low voltage electric apparatus
GB 1410 Methods of test for insulation resistance, volume resistivity and surface
resistivity of solid insulating electrical materials
GB 2423.1 Basic environmental testing procedures for electric and electronic
products - Tests A. Cold
GB 2423.2 Basic environmental testing procedures for electric and electronic
products - Tests B. Dry heat
GB 2423.3 Basic environmental testing procedures for electric and electronic
products - Test Ca. Damp heat, steady state
GB 2423.4 Basic environmental testing procedures for electric and electronic
products - Test Db. Damp heat, cyclic
GB 2423.5 Basic environmental testing procedures for electric and electronic
products - Test Ea. Shock
GB 2423.8 Basic environmental testing procedures for electric and electronic
products - Test Ed. Free fall
GB 2423.10 Basic environmental testing procedures for electric and electronic
products - Test Fe. Vibration (Sinusoidal)
GB 3836.2 Electrical apparatus for explosive atmosphere - Flameproof electrical
apparatus “d”
GB 3836.4 Electrical apparatus for explosive atmospheres - Intrinsically safe
circuits and electrical apparatus “i"
GB 4942.2 Low voltage electrical enclosure protection class
GB 5080.1 ~ 5080.7 Equipment reliability testing
GB 6379 Precision of test methods; Determination of repeatability and
reproducibility for a standard test method by interlaboratory tests
MT 209 Electrical and electronic products for coal mine communication, testing and
control - General technical requirements
3 General provisions
3.1 The test items and test methods specified in the identification inspection, factory-
exit inspection and type inspection of electrical and electronic products for coal mine
communication, testing and control shall comply with the relevant provisions of this
Standard.
3.2 The relevant standards shall specify the test method, severity level and test
sequence (if any) used according to the product type and the use environment
conditions.
3.3 The relevant standards shall specify the performance indicators and other relevant
requirements of test specimen during the test or after the test according to MT 209.
3.4 When the conditions for carrying out overall test on large-scale products are
5 General inspection
5.1 Inspection requirements
General inspection shall include appearance inspection, structural inspection,
dimensional inspection, weight inspection and other relevant inspection items
specified in the relevant standards.
The appearance inspection is to inspect whether the marking, surface quality,
corrosion traces, color, display clarity, flexibility and reliability of flexible parts of test
specimen and other appearance requirements comply with the relevant standards.
The structural inspection is to inspect whether the parts structure, electrical assembly,
mechanical assembly and other structural requirements comply with the relevant
standards.
The dimensional inspection is to inspect whether the product dimension, installation
dimension, parts dimension, clearance, creepage distance, explosion-proof surface
dimension, explosion-proof gap and other dimensional requirements comply with the
relevant standards.
The weight inspection is to inspect whether the weighing product and the parts with
the required weight comply with the relevant standards.
5.2 Inspection method
5.2.1 Appearance inspection and structural inspection
Visual inspection method is generally used. In the most favorable viewing distance and
appropriate illumination conditions, inspect with naked eyes with normal vision and
color resolution. For those with special stringent requirements, inspect with magnifying
glass or other measuring instruments.
5.2.2 Dimensional inspection and weight inspection
Inspect with qualified measuring instruments.
5.3 Details need to be specified
The relevant standards shall specify the following items.
a. Details of inspection site and items;
b. Criteria for defects;
c. Details of inspection instruments (if required).
8.2.3 In the course of the test if there is no insulation breakdown, surface flashover,
significant increase of leakage current or sudden drop in voltage and other phenomena,
the product is determined qualified. The determination method for surface flashover
and leakage current increase shall comply with Annex A of this Standard.
8.3 Details need to be specified
The relevant standards sh...