JB 6391.2-1992 Technical conditions for crane sliding transmission device
Some standard content:
Machinery Industry Standard of the People's Republic of China
Crane sliding transmission device
Technical conditions
1 Subject content and scope of application
JB 6391. 2--92||tt| |This standard specifies the technical requirements and test methods, marking, packaging, transportation and storage of crane sliding transmission devices. This standard applies to sliding connection power transmission devices (hereinafter referred to as devices) and their accessories that provide electric energy to lifting machinery, transportation machinery and other mobile power receiving equipment for various purposes working indoors or outdoors. Its rated voltage is AC 1200V and Below, the operating frequency is 50Hz, and the DC is 1500V and below.
Note: Mobile powered equipment with an operating frequency of 60Hz can be used equally. 2 Reference standards
GB156
Rated voltage
GB 191
Packaging, storage and transportation pictorial mark
GB1408
Power frequency of solid insulating materials Electrical strength test method GB 2893
Safety color
GB 3048.4
GB4064
Wide conductive core DC resistance test method
Wires and cables||tt| |Safety Design Guidelines for Electrical Equipment
Method for determination of tracking index and tracking resistance index of solid insulating materials under humid conditions GB 4207
GB4942.2 Protection level of low-voltage electrical appliances GB5169 .7 Fire hazard test for electrical and electronic products Bunsen burner flame test method GB8923 Steel surface corrosion grade and rust removal grade before coating GB/T 13306 Label
General technical conditions for mechanical and electrical product packaging
GB/ T 13384
GB/T 14048.1
General principles for low-voltage switchgear and control equipment
JB4003
Brushes for motors
3 special symbols||tt| |U
Rated operating voltage;
U;-rated insulation voltage;
Uimp impulse withstand voltage;
I. - Recommended value of rated current carrying capacity;
Iew
Rated short-time withstand current effective value;
I.—Rated short-time withstand current peak current; CTI
IP-
Compared tracking index;
Enclosure protection level;
Ministry of Mechanical and Electronic Industry of the People's Republic of China 1992-07-14 Approved 20
1993-07 -01 implementation
rated frequency;
V——rated linear speed;
cosp-power factor.
4 Technical requirements
JB 6391.2-92
4.1 The device should comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. and Its average temperature shall not exceed 10 35C within 24 hours. 4.2.1.2 Atmospheric conditions
a: Indoor atmospheric relative humidity does not exceed 50% when the ambient air temperature is 10+40C; higher relative humidity can be achieved at lower ambient temperatures:
b When the outdoor temperature is 1025C, the relative humidity can briefly reach 100%. 4.2.1.3 Altitude
The altitude of the place of use shall not exceed 2000m. 4.2.1.4 Installation category
The device installation category is Category II according to GB/T14048.1. 4.2.1.5 Pollution level
The pollution level of the device is level 3 and level 4 according to GB/T14048.1. 4.2.1.6 Anti-shock level
For devices with insulating non-metallic materials as the shell, the anti-shock level should comply with level 0 or above in GB/T14048.1; for devices with metal materials as the shell, the anti-shock level should comply with GB /T14048.1 Level 1 and above. 4.2.2 Special conditions of use
When the following conditions of use exist, they shall be resolved through negotiation between the user and the manufacturer. a.
b.
c.
d.
e.
f.
g.
h
Does not comply with the usage environment conditions stipulated in Article 4.2.1; Abnormal condensation occurs in the device due to rapid changes in temperature and air pressure in the usage environment; Conductive dust, smoke, corrosive particles, radioactive particles, and steam are present in the usage environment or salt spray pollution, the device is used in an environment with strong electric fields or strong magnetic fields; the device is exposed to high temperatures and is locally radiated by heat sources or long-term radiation from electricity and light; the device is used in an environment corroded by mold or microorganisms; the device is used in an environment prone to flammable and explosive places;
device is used in places with strong vibration and impact. 4.3 Ratings and limit values ??of the device
4.3.1 The rated working voltage of the device shall comply with the regulations of GB156, and the maximum rated working voltage shall not exceed AC 1200V or DC 1500V.
4.3.2 The maximum rated current of the device shall not exceed 2000A. 4.3.3 The rated operating frequency of the device is 50Hz. 4.3.4 The rated linear speed of the device should meet the requirements of the crane's operating speed, and its value is 80, 125.240.360m/min. 4.4 Performance requirements
4.4.1 Insulation resistance
Under normal use conditions, the insulation resistance between the live parts of the device and the live body to the shell should not be less than 5M2. 4.4.2 Insulation dielectric Strength
21
4.4.2.1 Power frequency AC withstand voltage
JB 6391.2—92
Under normal use conditions of the device, between independent charged bodies and between charged bodies Between it and the non-charged body, it should be able to withstand the AC power frequency test voltage specified in Table 1 for 1 minute without flashover or breakdown. Table 1
Rated insulation voltage U
160
>60~-300
300660
2660~800
2800~1 000
>1 0001 200
4, 4.2.2 Rated impulse withstand voltage
Power frequency voltage test voltage value (AC effective value) 1000
2000||tt ||2500
3000
3500
4200
V
The insulation coordination of the device, when it needs to be verified by the rated impulse withstand voltage, should be as follows The voltage required in Table 2 is carried out, and no breakdown flashover occurs. Table 2
Maximum phase-to-ground voltage determined by the rated voltage of the power system (AC rms or DC) 50
100
150
300
600
1000
1200 (DC 1500)
4.4.3 Temperature rise
Rated impulse withstand voltage priority value (1.2/50, 2000m Um), kV installation category (overvoltage category)
Ⅲ
0.80
1.50
2.50
4.00
6.00|| tt | | 8.00 | | tt | | 12.00 |
Table 3
Part
Bit
Power supply terminal block
Transmission rail connector
Insulation material
Heat-resistant temperature
c
Transmission guide rail
22
>95
85
75
60||tt ||95
85
75
60
Allow temperature rise.K
65
65
45| |tt||30
53
45
35
20
4.4.4 Rated short-time withstand current capability test JB 6391.2-92| |tt||When the device is tested for the effective value and peak current of the rated short-time withstand current AC component in accordance with Article 5.4, the electrothermal stress and electrodynamic stress caused shall not cause harmful deformation of the device that affects normal operation. Its electrical performance There should be no changes. 4.4.4.1Rated short-time withstand current AC component effective value I and peak current I. And the relationship between the corresponding power factor is given in Table 4. Bee value current refers to the peak current of the first cycle of the short-circuit current including the DC component. Peak short-time withstand current I. A short-time withstand current AC component effective value Ic × peak coefficient n. Table 4
Rated short-time withstand current effective value Iw.kA
1.5
>1.5~~3. 0
>3. 0 ~4. 5| |tt||>4.5~6.0
>6. 0～10
>10～20
>20～50
50
Power factor cosp
0.95
0.90
0.80
0.70
0.50
0.30
0.25
0.20| |tt||Peak bee value coefficient n
1.41
1.42
1.47
1.53
1.70
2.00
2.10
2.20
4.4.4.2 Each specification of the device shall specify the rated short-time withstand current index value, and the effective value of the rated short-time withstand current shall not be less than 20 times the rated current value.
4.4.5 DC resistance and impedance values
The DC resistance and impedance values ??of the device should be given in the product manual or other technical documents. 4.4.6 The continuous operation performance of the current collector
device is tested according to Article 5.6. Under normal operating conditions, with the rated current of the collector flowing and continuous operation at rated line speed for 8 hours, when the heat-resistant temperature of the insulation material around the collector brush is 85C, the allowable temperature rise at the collector brush end is 55K; when it is above 95C, The allowable temperature rise is 65K. During continuous operation, all components of the device shall not suffer insulation failure or other faults that affect operation, and the collector brushes shall not be replaced. 4.4.7 Horizontal mechanical load test
Devices placed horizontally should be able to withstand the test specified in Article 5. After the test, the external connection parts of the device shall not undergo permanent deformation that affects the normal operation of the device.
4.4.8 Vertical installation mechanical load test
For vertical installation devices, they should be able to withstand the test in Article 5.8. After the test, there will be no faults that hinder the normal operation of the device, and no relative movement between the power transmission rail and the housing.
4.4.9 Impact load test
The sliding conduits or wires and other non-metallic parts of the non-metallic insulating material shell shall be able to withstand the test specified in Article 5.9.2. After the test, the shell shall not produce any Cracked or damaged. Devices with metal casings shall be able to withstand the tests specified in Article 5.9.1. 4.4.10 Shell protection level
The protection level of the device shell is not lower than IP11 for indoor type and not lower than IP13 for outdoor type. 4.4.11 Resistance to abnormal heat and fire hazard performance. Insulating materials in contact with live objects should be able to Meet the tests specified in Article 5.11. 4.5 Structural requirements
4.5.1 Electrical clearance
4.5.1.1 The electric field conditions of the device are specified as "Case A" in GB/T14048.1, non-uniform electric field conditions. The minimum electrical clearance value in the air should comply with the requirements in Table 5. If it is greater than or equal to the minimum electrical clearance value specified in Table 5, the insulation dielectric strength test does not need to be conducted with the rated 23
impulse withstand voltage test.
Constant impulse withstand voltage Uim
ky
0.80
1.50
2.00
2.50
3.00||tt ||4.00
5.00
6.00
8.00
10.00
12.00
4.5.2 Creepage distance
JB 6391.2--92
Table 5
Minimum electrical clearance.mm
Pollution level
3
0.80
0.80||tt| |1.00
1.50
2.00
3.00
4.00
5.50
8.00
11.00
14.00
4
1.60
1.60
1.6n
1.
2. 00
3.00||tt| |4.00
5.50
8.00
11.00
14.00
The minimum creepage distance of the device that can withstand long-term voltage is selected according to Table 6. For devices with an electrical clearance smaller than that specified in Table 5 and tested with rated impulse withstand voltage, the creepage distance should not be less than the minimum electrical clearance value specified in Table 5. Table 6 | |tt | |20
25
32
40
50
63
80
100
125 (127)
160
24
1.0
1.05
1.1
1.2
1.25
1.3
1. 4
1.5
1.6
1.7
1.8
1.9
2.0
Pollution level 3
Material group 2}
1
1.0
1. 05
1.1
1.2
1.25
1.3
1.6
1.7
1.8
1.9
2.0
2.1
2.2| |tt||fa
1.0
1.05
1.1
1.2
1.25
1.3
1.8||tt ||1.9
2.0
2.1
2.2
2. 4
2.5
I
1.0||tt ||1.05
1.1
1.2
1.25
1.3
1.8
1.9
2.0
2.1
2.2
2.4
2.5
1.6
1. 7
1.8
1. 9||tt ||2.0
2.1
2.2
2.4
2.5
3.2
Pollution level 4
Material group| |tt||Ia
1.6
1.7
1.8
2. 4
2.5
2.6
2.8| |tt||3.0
3.2
4.0
1.6
1.7
1. 8
3.0
3.2| |tt||3.4
3.6
3.8
4.0
5.0
Ib
1)
net|| tt||“
Rated insulation voltage U
V
200(208)
250
320
400||tt| |500
630(690)
800(830)
1000
1250
1 600(1 650)
2.5| |tt||3.2
4.0
5.0
6.3
8.0
10
12.5
16||tt ||20
JB6391.2-92
Continued Table 6
Minimum creepage distance of device withstanding long-term voltage +mm Pollution level 3
Material group 2)
la||tt| |2.8
3.6
4.5
5. 6
7.1
9.0
11
14||tt| |18
22
3. 2
4.0
5. 0
6.3
8.0
10|| tt||12.5
16
20
25
face
3.2
4.0
5. 0|| tt||6.3
8.0
10
1)
4.0
5.0
6.3
8.0||tt ||10
12.5
16
20
25
32
Pollution level 4
Material group| |tt||a
5.0
6.3
8.0
10
12.5
16
20||tt ||25
32
40
6.3
8.0
10
12.5
16
20
25
32
40
50
b
1)
Generally not recommended for pollution levels 3. The voltage is above 630V, and it is not recommended for use in pollution, etc. Note: 1) The electrical distance in this area has not yet been determined. Material group IIIb-level 4.
2) Material groups are divided according to comparative tracking index (CTI): Insulation material group [
Insulation material group II
Insulation material group is set a|| tt||Insulating material group sub-b
600≤CTI
400≤CTI600
175≤CTI<400
100≤CTI175
4.5. 3. The sliding conductor shell should be made of materials with good insulation. The thickness of the shell is not less than 1mm. The sliding conduit shell is made of
steel, aluminum alloy materials or non-metallic materials. The sliding conduit shell made of steel plates should be derusted, and the rust removal grade is St3 level in GB8923; the shell made of aluminum alloy material should be surface oxidized. The minimum thickness of the sliding conduit shell shall comply with the requirements in Table 7. Table 7
Maximum width of sliding conduit section 4
Plate
Steel
150
150~300
>300~500| |tt||>500～700
>700
1.0
1.4
1.6
2.0
2.3
Minimum thickness of sliding conduit
Aluminum or aluminum alloy
1.6
2.0
2.3
2.9
3.12
Plastic
2.5
5.0
mm
4.5.4 For sliding conductor shells with a thickness less than 1mm, an insulation breakdown voltage test should be carried out, and the breakdown voltage should not be less than 14kV/mm. 4.5.5
device should have an end cap unit. If the installation length exceeds the installation length specified by the manufacturer, a compensation unit must be provided. 4. 5. 6
logo.
In a three-phase four-wire (1, L2, Ls, PE) circuit, the cross-section of the transmission rail as the PE line should comply with the requirements in Table 8, and the phase line cross-section S of the device should be marked with the symbol \PE25
16
>16~35
>35
Note: The material of the protective wire in the table should be the same as the phase wire. JB 6391.2-92
Table 8
Minimum cross-section S of the corresponding protection line,
16
S/2
mm?
4.5 .7 Metal-cased sliding conduits should have obvious protective grounding marks, and reliable electrical continuity of the shell should be ensured when connecting. The minimum specifications of the grounding screw used for grounding the shell are shown in Table 9. When the shell is used as neutral protection, it should meet the requirements for the cross-sectional area of ??the neutral protection body. Table 9
Rated current I.,A
20
≥20~200
>200~630
>630~1 000||tt ||>1000
4.5.8 The external color of non-metallic sliding conduits or wires shall comply with the regulations of GB2893. Minimum grounding screw.mm
M4
M6
M8
M10
M12
4.5.9 The external power transmission conductor of the device should be Spaces with external wires or cables should have a structure to prevent the terminals from being directly affected by external forces.
4.5.10 When insulating materials such as ceramics that are not susceptible to thermal deformation are used, or metal parts with sufficient elastic energy storage in the connecting parts to compensate for the deformation of the insulating material, the electrical connection contact pressure of the device can be transmitted through the insulating material . Otherwise, the contact pressure of the electrical connection cannot be transmitted through the insulating material.
For outdoor electrical connections, copper-copper materials must be tinned, and copper-aluminum materials should use copper-aluminum transition joints, or other effective ways to eliminate electrical corrosion.
4.5.11
The collector brush of the current collector should be made of materials with self-lubricating properties and good contact conductivity, and its performance should meet the requirements of JB4003. The collector brush should have a mark on the effective range of use. 4.5.12 Transmission guide rails made of composite conductive materials should be able to withstand the test specified in Article 5.13. 5 Test methods
5.1 Insulation resistance measurement
The insulation resistance of the device should be measured for each component unit under normal use conditions. The measurement location should be between each live body, and between the live body and the shell and the ground terminal. The voltage levels of instruments for measuring insulation resistance are shown in Table 10. Table 10
Rated insulation voltage U;
60
>60~660
>660~~1 500
5.2 Insulation dielectric strength test| |tt||5.2.1 Power frequency withstand voltage test
Voltage level of megohmmeter
250
500
1000
V||tt ||The test voltage should be applied between each live body and between the live body and the shell (ground terminal). The test voltage is sine wave, AC 50Hz. During the test, first apply 30% to 50% of the test voltage value specified in Table 1 to the test site, and then gradually increase it to the specified 26
JB 6391.2-92
voltage value within 30 seconds, and Maintain this value for 1 minute, and finally perform a voltage reduction operation until the power supply is cut off when the voltage reaches zero. There should be no breakdown and flashover during the test.
5.2.2 Rated impulse withstand voltage test
Conduct according to the method specified in Article 8.2.3.4.2 of GB/T14048.1 and the rated impulse withstand voltage value specified in Table 2 of this standard , there should be no breakdown and flashover during the test.
5.3 Temperature rise test
5.3.1 Test piece requirements
During the temperature rise test, the length of the test piece shall not be less than 3, and there shall be at least one transmission rail connection point and a power terminal connection point. (Except sliding conductors that do not need to be connected). Measuring parts: the middle part of the transmission guide rail, each connection point and the casing. The temperature rise test of the current collector is carried out in a static state. When using one current collector, pass half the rated current of the collector, or use two current collectors to pass the rated current of the collector. During the test, ensure the contact pressure in the working state; measure the temperature at the end of the collector brush. The device under test should be covered and installed according to normal use conditions, with a suspension height of 1m. 5.3.2 The ambient temperature measurement is carried out in accordance with GB/T14048.1 Article 8.2.3.3.1. The temperature rise data of the ambient temperature in the range of 10~40C does not need to be corrected.
5.3.3 Test current
The test current value is the rated continuous current. At the beginning of heating, 120% of the rated current is allowed, and multi-pole sliding conduits or wires are allowed to be energized in single-phase series or parallel testing. 5.3.4 External conductor size
Test external conductors according to the provisions of Article 8.2.3.3.4a, b, and c in GB/T14048.1. 5.3.5 Stable heating
The stable determination of heating shall be measured by a thermocouple or alcohol thermometer in accordance with the provisions of Article 8.2.3.3.2 of GB/T14048.1 (but the continuous power-on time shall not exceed 8 hours).
5.3.6 Test results
The actual measured value of the temperature rise after the test shall not exceed the requirements in Table 3. 5.4 Rated short-time withstand current capability test
5.4.1 Test piece requirements
The sliding conduit or conductor shall be placed according to normal use conditions, and shall include at least one guide rail connection point and one conduit or conductor shell connection point . Its total length is not less than 3m.
5.4.2 Test current value and duration
The test piece is tested according to the short-time withstand current or rated peak withstand current given in Article 4.4.4. The test time of the rated short-time withstand current is 1s, and the set current value is the average of the effective values ??of all phase current components. The allowable error of It is -5% to 15%. If the test power supply capacity is not enough, the power-on time is allowed to be appropriately extended while keeping the I value unchanged, but not more than 2S. The allowable error range of 1t is 0~15% of the rated peak withstand current test. The power-on time is 0.1s. The product of the square of the effective value of the test current and the power-on time should not be greater than the corresponding value during the rated short-time withstand current test. The test current is allowed The error range is -5% to 10% of the rated peak withstand current. 5.4.3 Test power supply
The three-phase three-wire system should be tested in the three-phase circuit; the three-phase four-wire system should not only be tested in the three-phase circuit, but also in a single circuit composed of the neutral conductor and adjacent conductors. Performed in phase loop. The above test can also be replaced by a single-phase loop test between adjacent single-phase conductors. 5.4.4 Test results | Affecting the smooth movement of current collectors; h. It does not require any maintenance and can meet the power frequency withstand voltage test requirements of 2 times the rated insulation voltage. 5.5 DC resistance and impedance testing
27
JB6391.2-92
5.5.1 DC resistance measurement should comply with the requirements of GB3048.4. a. To measure the DC resistance of sliding conduits or wires, take 3 samples, each 1 meter, and there must be a connection point for the transmission rail. Composite materials should be measured according to their current conduction paths. Measure 3 times and calculate the arithmetic mean;
b. Measurement of DC contact resistance of current collector and transmission guide rail. Place the current collector and sliding conduit or wire according to normal use conditions, and measure the resistance of the transmission guide rail and collector output end. . Measure 3 times and calculate the arithmetic mean.
5.5.2 Impedance measurement
The total length of the device is 3m. In normal use, pass the rated current I to the thermal state, make and break 3 times in succession, measure the voltage drop at both ends of the transmission rail, and Calculate the arithmetic average voltage drop U and arithmetic average current I. The impedance of each phase is calculated according to formula (1): ZU/:
where: Z-impedance value.2/km;
U.. -
arithmetic mean voltage drop, V/km;
I
arithmetic mean current.A.
5.6 Continuous operation performance test of collector
(1)
The device is placed in normal working condition, with at least 2 connection points, the rated current of the collector is passed, and the multi-pole sliding connection The transmission conduits or wires can be connected in series with a single-phase power supply. After the collector runs continuously at the rated traveling speed for not less than 8 hours, it should be stopped immediately and the temperature at the brush end should be measured directly with a thermocouple or alcohol thermometer. The test results should comply with Section 4.4. 6 requirements. 5.7 Horizontal placement mechanical load test
The device is placed horizontally according to normal working conditions, and the total length of the sliding conduit or wire is 6m (two sections must be used). Suspend according to the spacing in the working state, and the weight placed at the connection part is equivalent to the weight of 8 times the suspension spacing length of the sliding conduit or wire of the same specification (Figure 1). After removing the heavy objects, the device meets the following requirements to pass the test.
Measurement of insulation resistance complies with Article 4.4.1
a.
b.
c.
There is no relative displacement between the transmission rail and the shell; set The appliance can move smoothly through connections. Heavy objects
Suspension spacing
5.8 Vertical placement mechanical load test
Connection part
Figure 1
Heavy objects
o|| tt||The device is placed vertically according to the normal working state. Take the straight sliding conduit or conductor 3Ⅱ and hang it vertically according to the spacing of the working state. The weight suspended at the lower end of the guide rail is equivalent to 10 times the suspension spacing of the sliding conduit or conductor of the same specification. Length weight. After removing the heavy objects, the device meets the following requirements to pass the test.
a.
The measurement of insulation resistance complies with Article 4.4.1:
b.
There is no relative displacement between the transmission rail and the shell; c.
The current collector can travel smoothly and pass through the connecting parts. 5.9 Impact load test
28bzxZ.net
7 Horizontal placement mechanical load test
The device is placed horizontally according to normal working conditions, and the total length of the sliding conduit or wire is 6m (two sections must be used). Suspend according to the spacing in the working state, and the weight placed at the connection part is equivalent to the weight of 8 times the suspension spacing length of the sliding conduit or wire of the same specification (Figure 1). After removing the heavy objects, the device meets the following requirements to pass the test.
Measurement of insulation resistance complies with Article 4.4.1
a.
b.
c.
There is no relative displacement between the transmission rail and the shell; set The appliance can move smoothly through connections. Heavy objects
Suspension spacing
5.8 Vertical placement mechanical load test
Connection part
Figure 1
Heavy objects
o|| tt||The device is placed vertically according to the normal working condition. Take the straight sliding conduit or conductor 3Ⅱ and hang it vertically according to the spacing of the working state. The weight suspended at the lower end of the guide rail is equivalent to 10 times the suspension spacing of the sliding conduit or conductor of the same specification. Length weight. After removing the heavy objects, the device meets the following requirements to pass the test.
a.
The insulation resistance measurement complies with Article 4.4.1:
b.
There is no relative displacement between the transmission rail and the shell; c.
The current collector can travel smoothly and pass through the connecting parts. 5.9 Impact load test
28
7 Horizontal placement mechanical load test
The device is placed horizontally according to normal working conditions, and the total length of the sliding conduit or wire is 6m (two sections must be used). Suspend according to the spacing in the working state, and the weight placed at the connection part is equivalent to the weight of 8 times the suspension spacing length of the sliding conduit or wire of the same specification (Figure 1). After removing the heavy objects, the device meets the following requirements to pass the test.
Measurement of insulation resistance complies with Article 4.4.1
a.
b.
c.
There is no relative displacement between the transmission rail and the shell; set The appliance can move smoothly through connections. Heavy objects
Suspension spacing
5.8 Vertical placement mechanical load test
Connection part
Figure 1
Heavy objects
o|| tt||The device is placed vertically according to the normal working state. Take the straight sliding conduit or conductor 3Ⅱ and hang it vertically according to the spacing of the working state. The weight suspended at the lower end of the guide rail is equivalent to 10 times the suspension spacing of the sliding conduit or conductor of the same specification. Length weight. After removing the heavy objects, the device meets the following requirements to pass the test.
a.
The insulation resistance measurement complies with Article 4.4.1:
b.
There is no relative displacement between the transmission rail and the shell; c.
The current collector can travel smoothly and pass through the connecting parts. 5.9 Impact load test
28
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