This standard specifies the test methods for excavator electronic control equipment (mainly composed of high-voltage electrical appliances and low-voltage electrical components). This standard is applicable to the test of electric drive control equipment for excavators driven by open-pit mines or other engineering power with an AC power grid rated at 50Hz, 6KV or below. JB/T 5864-1991 Test methods for excavator electronic control equipment JB/T5864-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB5864-91
Test Methods for Electronic Control Equipment of Excavators
Published on October 24, 1991
Implementation of the Ministry of Machinery and Electronics Industry of the People's Republic of China on October 1, 1992
Mechanical Industry Standard of the People's Republic of China
Test Methods for Electronic Control Equipment of Excavators
This standard refers to IEC439-1 "Low Voltage Switchgear and Control Equipment Devices". 1 Subject Content and Scope of Application
JB5864--91
This standard specifies the test methods for electronic control equipment of excavators (mainly composed of high voltage electrical appliances, low voltage electrical appliances and electronic devices). This standard is applicable to the test of electrical transmission control equipment of excavators driven by electric power in open-pit mines or other projects with a power grid of AC rated 50Hz, 6kV or less.
2 Reference standards
GB3797
GB4720
GB4208
ZBK62003
3 Inspection
3.1. Appearance inspection
Electrical control equipment Part 2: Electronic control equipment equipped with electronic devicesElectrical control equipment Part 1: Classification of enclosure protection levels of low-voltage electrical appliances and electronic control equipment
Electrical control equipment for excavators
3.1.1: Check that the electrical installation of the equipment (such as component models, specifications, welding positions, busbar phase sequence arrangement, line wiring and color marking) should comply with the requirements of the drawings and indicate their codes. 3.1.2 Check that the surface coating and paint quality of the parts, components and members of the equipment should meet the requirements of the drawings. 3.2 Dimension inspection
3.2.1 Check that the parts, components, members, accessories and assembly dimensions of the equipment must meet the dimensions and tolerances specified in the design drawings or relevant materials. 3.2.2 Check that the electrical clearance and electrical distance and assembly spacing of the equipment must meet the requirements of relevant standards. 3.3 Manufacturing quality inspection
3.3.1 Check that the components, welding and assembly of the equipment must be firm. 3.3.2 Check that the protective measures of the equipment to prevent electric shock to the human body must meet the requirements of relevant standards. The inspection content includes shell protection, grounding devices, etc.
3.3.3 Check the quality of printed circuit boards, plug-ins and drawers in the equipment. The contact should be good and the installation should be firm, which should meet the requirements of relevant standards.
3.3.4· Check the specifications of the busbars, conductors, cables and terminal numbers used in each circuit. They should comply with the requirements of the drawings and relevant standards. The connections should be in good contact and the numbers should be clear and not faded. 3.3.5 Check that all electrical operating mechanisms and mechanical interlocking devices of the equipment are flexible and correct. 3.3.6 Check that the quantity and model specifications of the spare parts of the equipment comply with the requirements of the product manual. 3.3.7 Check that the nameplate, nameplate and technical documents accompanying the equipment are complete and in good condition and comply with the requirements of relevant standards. 4 Tests
4.1 Test classification
Approved by the Ministry of Machinery and Electronics Industry on October 24, 1991 and implemented on October 1, 1992
JB5864-91
Equipment is allowed to be submitted for testing only after passing the above inspections. The test is divided into type test and factory test. Type test (except industrial operation test items) and factory test items should be completed in the manufacturing plant. Industrial operation test can be carried out at the operation site of the equipment according to the agreement signed with the user.
4.1.1. Type test
Type test is to verify the comprehensive performance and quality of the product, and can confirm whether the product complies with the provisions of ZBK62003 and design documents.
4.1.1.1 Selection of test productswww.bzxz.net
Products undergoing type test should first undergo factory test. All items of type test should be carried out on the same set of products, or they can be verified separately on multiple products in the same batch of products manufactured according to the same design. For series design products, several typical specifications can be selected for testing. 4.1.1.2 Type tests should be conducted in the following cases: a. When new products are being trial-tested; for products that have been finalized and mass-produced, random tests should be conducted every three years; for products that have been finalized but not frequently produced, when they are produced again after a break of three years or more; for products that have been finalized, when changes in design, process, main electrical components or key materials may affect product performance. The documents and drawings that type tests should be based on are: ZBK62003 This standard Electrical schematics, wiring diagrams, product technical conditions, trial production and appraisal of specific products. Type test items: Wiring inspection; Insulation resistance measurement; Ground resistance measurement; Dielectric strength test; Verification of mechanical action; Verification of protection level; Power-on operation test, Setting test of electrical components; No-load test; Load test; Temperature rise test; High and low temperature cycle test; High temperature storage test; Low temperature storage test; Ambient temperature performance test; Vibration resistance test; Industrial operation test. If one item of the type test fails, the item shall be retested after repair, and a product certificate shall be issued after passing. 4.1.2 Factory test
Each equipment must be tested before leaving the factory. After all the factory test items are qualified, a product certificate of conformity shall be issued. If any item in the factory test fails, it shall be repaired and then retested before the product certificate of conformity can be issued. 4.1.2.1: Documents and drawings that the factory test should be based on a. ZBK62003;
b. This standard;
JB5864-91
Electrical schematic diagram, wiring diagram, product technical conditions, and trial production and appraisal outline of the specific product. 4.1.2.2 Factory test items
The factory test items include a, b, c, d, e, g, h, i, l\ in Article 4.1.1.4. Note: ① In order to shorten the test time, item c allows random testing, and 1 to 2 units are tested in each batch. 1): When there are no conditions for assessment as a factory test item temporarily, it is allowed to be assessed as a type test item. Wiring check
For the control circuit, measuring circuit, protection circuit, use a multimeter with low resistance to check the wiring connection and disconnection, which must comply with the requirements of the drawing. 4.3 Insulation resistance measurement
The insulation resistance between the low-voltage and medium-voltage live circuits and the high-voltage primary circuit of the equipment and the casing should be no less than 1MQ and 10MQ respectively. When there are semiconductor devices and capacitors in the circuit, they should be removed or short-circuited in advance. The voltage level of the megohmmeter should be selected according to the rated voltage of each circuit and the provisions of Table 1. The insulation resistance value is only for auxiliary judgment reference before and after the dielectric strength test and is not assessed. Table 1
U≤48
48500
4.4: Grounding resistance measurement
Rated voltage of megohmmeter
A direct current is passed between the metal shell, metal components and grounding screw of the equipment, and the voltage between the two is measured. The calculated grounding resistance should not exceed 0.1Q. If the resistance value measured by the bridge method is the same as the direct current voltage drop method, the bridge method can also be used for measurement. 4.5 Dielectric strength test
Test part
Between circuits without electrical connection;
Between live parts and the casing.
Note: semiconductor devices and capacitors should be short-circuited or removed before testing. 4.5.2
See Table 2 and Table 3 for the selection of test voltage.
Insulation voltage U,
U;≤60
60U380
380
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