Jiangsu Junshuai Special Cable Technology Co., Ltd. is a professional manufacturer and seller of special cables—custom-made special wires and cables for special applications. Our company produces drag chain cables, PUR reel cables, high and low temperature cables, crane flat cables, traveling cables, floating cables, shielded cables, CCC cables, UL cables, CE wires, coaxial cables, high, medium and low voltage flat equipment mobile cables, security cables, and customized mobile special cables. The company possesses advanced domestic production and testing equipment and has obtained CCC, UL, ISO9001, and CE certifications. Junshuai Special Cable is committed to integrity, survival through quality and reputation, and service. We continuously explore and innovate, constantly improving to better serve our customers. We welcome sincere cooperation from new and old friends both domestically and internationally.

The Ministry of Commerce recently announced on its website that the European Commission has issued its final ruling on the mid-term review of anti-dumping and countervailing duties on Chinese photovoltaic products, deciding to change the form of the measures by replacing the original price undertaking with a lower price ceiling. Implementing a lower export price ceiling means that the implementing country sets a lower price limit; if the export price of another country is higher than the lower price ceiling, no tax is levied; if it is lower than the lower price ceiling, the tax is levied on the difference between the import price and the lower price ceiling. However, industry analysts point out that since it is uncertain what level of price ceiling the EU will ultimately determine, it is currently impossible to judge whether the new model will tighten or loosen regulations for Chinese photovoltaic products. Wang Hejun, Director of the Trade Remedy and Investigation Bureau of the Ministry of Commerce, pointed out that the China-EU photovoltaic price undertaking is the result of joint efforts by governments and industries under the high-level attention of both sides. China notes that the European Commission, in the mid-term review investigation process, partially incorporated the opinions put forward by the Chinese government, industry organizations, and enterprises, replacing the price undertaking with a lower price ceiling without quantitative restrictions, and gradually lowering the lower price ceiling level. This is a positive step towards promoting the rapid restoration of China-EU photovoltaic trade to a normal market state. Wang Hejun pointed out that in the past few years, the EU's anti-dumping and countervailing measures on photovoltaic products have objectively caused unnecessary distortions in the EU market, which is neither in China's nor the EU's interest. China hopes that the EU will terminate these measures as soon as possible, providing a more stable and predictable business environment for cooperation between the two industries and achieving mutual benefit for both sides.

Common cable line faults include mechanical damage, insulation damage, insulation dampness, insulation aging and deterioration, overvoltage, and cable overheating. When any of these faults occur, the power supply to the faulty cable should be cut off, the fault point should be located, the fault should be inspected and analyzed, and then repairs and tests should be carried out. Any cables that need to be cut should be removed. Power supply can only be restored after the fault has been eliminated. The most direct cause of cable failure is insulation degradation leading to breakdown. The main causes include:a) Overload operation: Long-term overload operation will cause the cable temperature to rise, insulation to age, and eventually insulation breakdown, reducing construction quality.b) Electrical factors: Inadequate cable termination construction, poor cable termination sealing, moisture intrusion into the cable, and decreased cable insulation performance; failure to take protective measures during cable laying, resulting in damage to the protective layer and reduced insulation.c) Civil engineering factors: Poor drainage in manholes and trenches, long-term immersion of cables in water, damaging insulation strength; manholes that are too small, insufficient cable bending radius, and long-term damage from external pressure. This is mainly due to rough handling by machinery during municipal construction, damaging or breaking cables.d) Corrosion: Long-term chemical corrosion or cable corrosion of the protective layer causes it to fail, reducing insulation. e. Poor quality of the cable itself or cable head accessories, poor sealing of the cable head, melting and cracking of the insulation glue, leading to the resonance phenomenon in the station. The line breakage fault causes the phase-to-phase capacitance and ground capacitance of the line to form a resonant circuit with the excitation inductance of the distribution transformer, thereby exciting ferroresonance. Hazards of resonance caused by line breakage faults In severe cases, the high-frequency resonance and the fundamental frequency resonance superimpose, which can make the overvoltage amplitude reach 2.5 times the phase voltage [P], which may lead to the displacement of the neutral point of the system, overvoltage of the windings and conductors, and in severe cases, insulation flashover, surge arrester explosion, and damage to electrical equipment. In some cases, the phase sequence of the load transformer may be reversed, and the overvoltage may also be transmitted to the low-voltage side of the transformer, causing damage. The main measures to prevent overvoltage caused by line breakage resonance are: (1) Do not use fuses to avoid non-full-phase operation. (2) Strengthen the inspection and maintenance of the line to prevent the occurrence of line breakage. (3) Do not leave unloaded transformers on the line for a long time. (4) Use a ring network or dual power supply. (5) Add interphase capacitors on the distribution transformer side. The principle is: Use capacitors as energy-absorbing elements to absorb energy in the transient process, thereby reducing the impact disturbance intensity and suppressing the occurrence of resonance. Add interphase capacitor ΔC on the distribution transformer side to increase 8-[Co+ 3(C U+ A0)/Ca, thereby increasing the equivalent capacitance C and the equivalent electromotive force Eo. The required capacitance value can be calculated according to the method in reference [6]. (6) Using a transformer with better excitation characteristics helps to reduce the probability of open circuit overvoltage.

The Ministry of Commerce recently announced on its website that the European Commission has issued its final ruling on the mid-term review of anti-dumping and countervailing duties on Chinese photovoltaic products, deciding to change the form of the measures by replacing the original price undertaking with a lower price ceiling. Implementing a lower export price ceiling means that the implementing country sets a lower price limit; if the export price of another country is higher than the lower price ceiling, no tax is levied; if it is lower than the lower price ceiling, the tax is levied on the difference between the import price and the lower price ceiling. However, industry analysts point out that since it is uncertain what level of price ceiling the EU will ultimately determine, it is currently impossible to judge whether the new model will tighten or loosen regulations for Chinese photovoltaic products. Wang Hejun, Director of the Trade Remedy and Investigation Bureau of the Ministry of Commerce, pointed out that the China-EU photovoltaic price undertaking is the result of joint efforts by governments and industries under the high-level attention of both sides. China notes that the European Commission, in the mid-term review investigation process, partially incorporated the opinions put forward by the Chinese government, industry organizations, and enterprises, replacing the price undertaking with a lower price ceiling without quantitative restrictions, and gradually lowering the lower price ceiling level. This is a positive step towards promoting the rapid restoration of China-EU photovoltaic trade to a normal market state. Wang Hejun pointed out that in the past few years, the EU's anti-dumping and countervailing measures on photovoltaic products have objectively caused unnecessary distortions in the EU market, which is neither in China's nor the EU's interest. China hopes that the EU will terminate these measures as soon as possible, providing a more stable and predictable business environment for cooperation between the two industries and achieving mutual benefit for both sides.

Common cable line faults include mechanical damage, insulation damage, insulation dampness, insulation aging and deterioration, overvoltage, and cable overheating. When any of these faults occur, the power supply to the faulty cable should be cut off, the fault point should be located, the fault should be inspected and analyzed, and then repairs and tests should be carried out. Any cables that need to be cut should be removed. Power supply can only be restored after the fault has been eliminated. The most direct cause of cable failure is insulation degradation leading to breakdown. The main causes include:a) Overload operation: Long-term overload operation will cause the cable temperature to rise, insulation to age, and eventually insulation breakdown, reducing construction quality.b) Electrical factors: Inadequate cable termination construction, poor cable termination sealing, moisture intrusion into the cable, and decreased cable insulation performance; failure to take protective measures during cable laying, resulting in damage to the protective layer and reduced insulation.c) Civil engineering factors: Poor drainage in manholes and trenches, long-term immersion of cables in water, damaging insulation strength; manholes that are too small, insufficient cable bending radius, and long-term damage from external pressure. This is mainly due to rough handling by machinery during municipal construction, damaging or breaking cables.d) Corrosion: Long-term chemical corrosion or cable corrosion of the protective layer causes it to fail, reducing insulation. e. Poor quality of the cable itself or cable head accessories, poor sealing of the cable head, melting and cracking of the insulation glue, leading to the resonance phenomenon in the station. The line breakage fault causes the phase-to-phase capacitance and ground capacitance of the line to form a resonant circuit with the excitation inductance of the distribution transformer, thereby exciting ferroresonance. Hazards of resonance caused by line breakage faults In severe cases, the high-frequency resonance and the fundamental frequency resonance superimpose, which can make the overvoltage amplitude reach 2.5 times the phase voltage [P], which may lead to the displacement of the neutral point of the system, overvoltage of the windings and conductors, and in severe cases, insulation flashover, surge arrester explosion, and damage to electrical equipment. In some cases, the phase sequence of the load transformer may be reversed, and the overvoltage may also be transmitted to the low-voltage side of the transformer, causing damage. The main measures to prevent overvoltage caused by line breakage resonance are: (1) Do not use fuses to avoid non-full-phase operation. (2) Strengthen the inspection and maintenance of the line to prevent the occurrence of line breakage. (3) Do not leave unloaded transformers on the line for a long time. (4) Use a ring network or dual power supply. (5) Add interphase capacitors on the distribution transformer side. The principle is: Use capacitors as energy-absorbing elements to absorb energy in the transient process, thereby reducing the impact disturbance intensity and suppressing the occurrence of resonance. Add interphase capacitor ΔC on the distribution transformer side to increase 8-[Co+ 3(C U+ A0)/Ca, thereby increasing the equivalent capacitance C and the equivalent electromotive force Eo. The required capacitance value can be calculated according to the method in reference [6]. (6) Using a transformer with better excitation characteristics helps to reduce the probability of open circuit overvoltage.

Jiangsu Junshuai Special Cable Technology Co., Ltd. is a professional manufacturer and seller of special cables—custom-made special wires and cables for special applications. Our company produces drag chain cables, PUR reel cables, high and low temperature cables, crane flat cables, traveling cables, floating cables, shielded cables, CCC cables, UL cables, CE wires, coaxial cables, high, medium and low voltage flat equipment mobile cables, security cables, and customized mobile special cables. The company possesses advanced domestic production and testing equipment and has obtained CCC, UL, ISO9001, and CE certifications. Junshuai Special Cable is committed to integrity, survival through quality and reputation, and service. We continuously explore and innovate, constantly improving to better serve our customers. We welcome sincere cooperation from new and old friends both domestically and internationally.