 
1、 Product features
This product consists of ladder shaped copper bar and Channel Or it is composed of "T" type copper bar and trough type aluminum. Special use of height Insulator As a support to form Hoisting machinery Mobile sliding contact line fed by equipment. This product has the following characteristics:
1. Reliable operation, never happening Power Supply Interrupt fault.
2. It can be used in high temperature, high dust, high corrosive gas and other harsh environments.
3. It has high mechanical strength, is not easy to bend and deform, and can withstand strong short circuit impulse current.
4. The current carrying capacity can be set according to the user's needs, which can reach more than 3000A and the voltage level can reach more than 5KV.
5. The use of copper or copper aluminum conductors can greatly reduce the electrical energy loss of conductors.
6. After adding auxiliary cables, it can form a low impedance sliding line, and the impedance of the conductor will be doubled and reduced.
7. The wiring can slide on the top or bottom.
8. JGH - "I" type slide wire has the advantages of extra large heat dissipation surface, compact and simple structure, convenient installation and maintenance, etc.
2、 Product model and specification 
Model, specification and rated current of steel sliding contact line | model | Nominal section ratio（ m m two ） | Rated voltage (A) | Weight (Kg/6m) | | JGH-85 | eighty-five | five hundred | twenty-four point three | | JGH-110 | one hundred and ten | six hundred | twenty-five point nine | | JGH-170 | one hundred and seventy | eight hundred | twenty-nine point four | | JGH-240 | two hundred and forty | one thousand | forty-six point one | | JGH-320 | three hundred and twenty | one thousand and two hundred | fifty point four | | JGH-170Ⅱ | 2x170 | one thousand and three hundred | fifty-three point nine | | JGH-240Ⅱ | 2x240 | one thousand and eight hundred | sixty-two point two | | JGH-320Ⅱ | 2x320 | two thousand and two hundred | sixty-eight point eight | | Note: The standard length of the sliding contact line is 6m, and the current carrying capacity can be set according to the user's needs, which can be more than 3000A. |
| model | Nominal section ratio（ m m two ） | Rated voltage (A) | Weight (Kg/6m) | | JGHI-10 | eighty-five | five hundred | twenty-four point three | | JGHI-110 | one hundred and ten | six hundred | twenty-five point nine | | JGHI-170 | one hundred and seventy | eight hundred | twenty-nine point four | | JGHI-240 | two hundred and forty | one thousand | forty-six point one | | JGHI-320 | three hundred and twenty | one thousand and two hundred | fifty point four | | JGHI-170Ⅱ | 2x170 | one thousand and three hundred | fifty-three point nine | | JGHI-240Ⅱ | 2x240 | one thousand and eight hundred | sixty-two point two | | JGHI-320Ⅱ | 2x320 | two thousand and two hundred | sixty-eight point eight |
Generally, the steel body sliding contact line shall be supplied at a fixed length of 6m.
The installation spacing of insulated support of steel sliding contact line is generally 3m
Sliding contact line is divided into single line type and double line equal feed type, except double line equal feed type, JGH- □ II indicates that, except for single line type, there is no additional table note, and its section is as follows: 
3、 Steel body slide wire series accessories  
D Collector  | | model | JDG-I | JDG-II | | Rated current (A) | six hundred
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one thousand and two hundred | | Contact pressure (kg) | 6±2
| 10±2 | | Voltage (V) | six hundred | 600-300 | | Slider material | Powder alloy | Powder alloy |
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4、 Connection of steel body sliding contact line
The connection of sliding contact line is shown in the figure below: 
During connection, two sections of supports are bolted through the internal steel core, and the copper conductor is clamped on the support with two long splints. In order to prevent expansion of the rigid body due to temperature changes, a gap should be left at the connection during installation. The size of the gap is shown in the following table: | Ambient temperature of the workplace | 30°C | 40°C | 60°C | 70°C | | Gap dimensions | 3-5mm | 5-7mm | 7-9mm | 10-15mm |
The size of the reserved clearance is related to the ambient temperature during installation. Generally, the higher value is taken for installation in winter, and the lower value is taken for installation in summer.
5、 Installation of sliding contact line 
The installation methods of sliding contact line are generally upper sliding contact and lower sliding contact, and other installation methods can also be used according to user requirements.
The mounting bracket of the sliding contact line is generally 3m. In special cases, strengthening measures can be taken to expand the distance appropriately. The phase to phase distance between the three sliding contact lines is 400mm. If the sliding contact line is of low impedance, the phase to phase distance can be expanded to 450mm.
6、 Design data and calculation method of steel body sliding contact line
1. Impedance value of sliding contact line and line voltage drop value at 100A-100m (when the operating voltage is 380V, COS is 0.8) Specification of sliding contact wire
mm two | Phase to phase distance
mm | Resistance drop value Z at 90 ° C
Ω/Km | Line voltage drop at 100A-100m | | u（V） | u% | | eighty-five | two hundred | zero point three six two nine | 6.29V | 1.65% | | three hundred | zero point three eight one three | 6060V | 1.73% | | four hundred | zero point three nine four six | 6084V | 1.80% | | one hundred and ten | two hundred | zero point three two zero two | 5.55V | 1.16% | | three hundred | zero point three four zero four | 5.90V | 1.55% | | four hundred | zero point three five five two | 6.15V | 1.62% | | one hundred and seventy | two hundred | zero point two six nine zero | 4.66V | 1.23% | | three hundred | zero point two nine one five | 5.05V | 1.33% | | four hundred | zero point three zero seven eight | 5.33V | 1.40% | | two hundred and forty | two hundred | zero point two four five nine | 4.26V | 1.12% | | three hundred | zero point two seven one six | 4.70V | 1.24% | | four hundred | zero point two eight five seven | 4.95V | 1.30% | | three hundred and twenty | two hundred | zero point two three two eight | 4.03V | 1.06% | | three hundred | zero point two five nine six | 4.50V | 1.18% | | four hundred | zero point two seven four one | 4.75V | 1.25% | | 2×170 | two hundred | zero point two zero seven six | 3.60V | 0.95% | | three hundred | zero point two three one nine | 4.02V | 1.06% | | four hundred | zero point two four nine three | 4.32V | 1.14% | | 2×240 | two hundred | zero point one nine seven six | 3.42V | 0.90% | | three hundred | zero point two two four nine | 3.90V | 1.03% | | four hundred | zero point two four one six | 4.19V | 1.10% | | 2×320 | two hundred | zero point one nine three two | 3.35V | 0.88% | | three hundred | zero point two one seven eight | 3.77V | 0.99% | | four hundred | zero point two zero four six | 4.06V | 1.07% |
2. Withstand current value of sliding contact line in case of short circuit (KA) (when the distance between mounting brackets is 3m) Specification of sliding contact wire
mm two | The phase to phase distance is | When the three phases of the sliding contact line are vertically placed, the phase to phase distance is | | 200mm | 300mm | 400mm | 200mm | 300mm | 400mm | | eighty-five | twenty-two | twenty-six | thirty-one | twenty-nine | thirty-five | forty-one | | one hundred and ten | twenty-three | twenty-seven | thirty-two | thirty | thirty-six | forty-two | | one hundred and seventy | twenty-five | thirty | thirty-five | thirty-two | thirty-nine | forty-five | | two hundred and forty | forty-one | >50 | >50 | >50 | >50 | >50 | | three hundred and twenty | forty-three | | 2×170 | >50 | | 2×240 | | 2×320 |
3. Deflection of steel sliding line (mm) Specification of sliding contact wire
mm two | The distance between supports is | The distance between supports is | | 2m | 3m | 4m | 5m | 2m | 3m | 4m | 5m | | eighty-five | zero point two eight | one point four four | four point six | eleven point one | zero point three three | one point six two | five point one four | twelve point six | | one hundred and ten | zero point three one | one point five two | four point eight | eleven point eight | zero point three five | one point seven two | five point four four | thirteen point two | | one hundred and seventy | zero point three five | one point seven three | five point four | thirteen point five | zero point three eight | one point nine six | six point one seven | fifteen | | two hundred and forty | zero point one six | zero point eight four | two point three | five point four | zero point two zero | one point zero eight | three point two zero | seven point eight | | three hundred and twenty | zero point one nine | zero point nine six | two point four | five point nine | zero point two four | one point two zero | three point six zero | eight point four | | 2×170 | zero point two two | one point zero nine | three point five | eight point five | zero point one seven | zero point eight six | two point seven zero | six point six | | 2×240 | zero point one six | zero point seven nine | two point five | six point one | zero point two two | one point one two | three point five zero | eight point five | | 2×320 | zero point one eight | zero point nine one | two point nine | seven point one | zero point two five | one point two eight | four point one zero | ten |
4. Load current calculation
The load current calculation method of sliding contact line used to adopt binomial formula. The calculation method adopted in most foreign data is as follows: multiply the motor installed on the crane that may operate at the same time and the rated current by the temporary load coefficient and the simultaneous coefficient of multiple cranes.
Load current (I)=rated current of all working motors (1H) × temporary load factor (FED) × simultaneous factor (F)
The temporary load coefficient of FED is determined according to the following table: (coefficient of simultaneous operation of multiple cranes: F is taken as 0.4-0.7) | Temporary load rate (ED) | Temporary load rate (FED) | | high standard | one | | 80% | zero point nine zero | | 60% | zero point seven eight | 50% | zero point seven one | | 40% | zero point six three |
5. Voltage drop of sliding contact line
In the past, large current was used to check the voltage drop when sliding contact lines were designed. That is, from the feed shape on the low-voltage screen to the end of the sliding contact line, the voltage drop, including the power supply cable, shall not exceed 12%, that is, the sliding contact line and the power supply line shall be considered as a whole, so as to ensure less investment under the condition of meeting the requirements of voltage drop. With the increase of introduced projects in recent years, foreign countries generally check the voltage drop with the load calculation current based on foreign data, and the voltage drop value from the power supply line to the end of the sliding line shall not exceed 5%.
Voltage calculation formula:
u= √ three × I × I × Z or u= √ three × I × I ×（RCOS ρ+ XSin Ψ）
Where: u=voltage drop (V), I=calculated load current (V), R=resistance (Ω/km)
X=inductance (Ω/km), Z=impedance (Ω/km), L=various lengths of sliding contact line (m)
Calculation length of sliding contact line: total length of sliding contact line (m)
When supplying power at the end of sliding contact line: I=L
When supplying power in the middle of sliding contact line: I=L/2
When both ends of the sliding contact line are powered simultaneously: I=L/4
When power is supplied at the distance L/6 between the ends of the sliding contact line: I=L/6 7、 Low impedance sliding contact line
In modern industry, with the increasing tonnage of cranes and the longer and longer operating distance, how to deal with the problem that the voltage drop on the sliding contact line does not exceed the allowable value needs to be properly solved in the design process. In the past, the methods to solve the problem of excessive voltage drop were as follows: increase the cross section of sliding contact line and power supply line; Increase the power supply points on the sliding contact line; Reducing the phase distance between three sliding contact lines, etc., but these measures often have little effect or are very uneconomical. This is because it is difficult to reduce the reactance value in the sliding contact line, so the first thing to do is to solve how to reduce the reactance value on the sliding contact line. Our factory, together with relevant design units, has studied foreign data, and added two auxiliary cables on the basis of rigid body sliding contact line to form a low impedance sliding contact line, which can double the impedance value of the line (after adding cables of different sections according to rigid bodies of different specifications, the impedance value can be reduced to the original 1/2-1/3). The following is a brief configuration diagram of the low impedance sliding contact line:  This product is installed and used in Zhujiang Iron and Steel Co., Ltd., Tongling Smelter, Shanxi Taigang Coking, Shagang Group, Huai'an Special Steel and other units. The user responded well. JGHX-T, JGHX-T Ⅱ, JGHX-T Ⅲ series steel body slide wire is composed of copper guide rail, guide rail bracket, insulator assembly, external collector and other components. Because of the characteristics of high current, high temperature resistance, corrosion resistance, etc., this product is widely used in metallurgy, shipbuilding, port and other industries Steel body sliding contact line (JGHX-T) , JGHX-T series steel body sliding contact wire
JGHX-T Serise steel collector bar | Model and specification
Type & spec | Sliding wire section size (mm) Bus size | Current carrying capacity (A)
Current(A) | Adapt to external collector
Suit able current collenctor | A | B | C | JGHX-T-85/300 | forty-eight | fifty-six | thirteen point four two | three hundred | TJD-600 | JGHX-T-110/400 | fifty | fifty-six | fourteen point one one | four hundred | TJD-600 | JGHX-T-170/500 | fifty-five | fifty-six | fifteen point eight eight | five hundred | TJD-600 | JGHX-T-240/700 | fifty-eight | fifty-six | sixteen point nine three | seven hundred | TJD-600 | JGHX-T-320/900 | sixty-three | fifty-six | eighteen point seven | nine hundred | TJD-600 | JGHX-T Ⅱ -170/1000 | sixty-five | eighty | forty-six | one thousand | TJD-1200 | JGHX-T Ⅱ -240/1300 | sixty-eight | eighty | forty-six | one thousand and three hundred | TJD-1200 | JGHX-T Ⅱ -320/1900 | seventy-three | eighty | fifty | one thousand and nine hundred | TJD-1200 | Note: Standard length of sliding contact line: 6m.
Note ： standard busbar length 6m. |
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