scholarly journals Mould and Process of an Injection Molding Rejuvenation Technique for Cable Insulation Failure

2021 ◽  
Vol 235 ◽  
pp. 01030
Author(s):  
XiaoJian Yang ◽  
YongXiang Zhao ◽  
JunGuo Wang ◽  
ZhiWei Liu
Keyword(s):  
Injection Molding ◽  
Standard Process ◽  
Cable Insulation ◽  
Insulation Failure ◽  
Quality Testing ◽  
Present Technique ◽  
Standard Mode

Mould and process are developed for an injection molding rejuvenation technique of cable insulation failure. Disregard the traditional clue that repair does not expand original damage in size and space, a new rejuvenation technique, i.e. injection molding, is developed for restoring cable insulation failure. In this technique the uncertain damage in size and space was replaced by a standard eliminated size and space. In this way, an expanded original damage with certain size and space is firstly made around cable insulation failure section. But the damage situation was modified to a standard mode so that a mould technology can be well applied to filling the modified size and space. In addition, the bigger size and space is applied by mould for over-filling the modified size and space. Then a standard process should be constructed by the repair practices till the quality testing verifies that a successful rejuvenation is reached. Applied practice has verified the applicability and availability of the present technique.

scholarly journals Frame Work on an Injection Molding Rejuvenation Technique for Cable Insulation Failure

2021 ◽  
Vol 235 ◽  
pp. 01046
Author(s):  
ChongWei Lv ◽  
YongXiang Zhao ◽  
JunGuo Wang ◽  
ZhiWei Liu
Keyword(s):  
Injection Molding ◽  
Mechanical Damage ◽  
Cable Insulation ◽  
Plastic Molding ◽  
Material Development ◽  
Water Tree ◽  
Insulation Failure ◽  
Local Standard ◽  
Standard Geometry ◽  
Frame Work

Rejuvenation technique on cable insulation failures is a hot topic in improving production benefits for electric related enterprises. Breaking the traditional thought of repair action without extensive former damage in scale of the cable insulation, the proposed technique starts from the local standard geometry elimination on insulation or sheaths around cable insulation failure section(s). And then, one standard injection molding technique is applied for rejuvenation on eliminated insulation no matter of the failure resulting from water tree or local mechanical damage or other modes. By this advancement, an injection molding technique is perfectly developed for rejuvenation on cable insulation failure. Frame work on this technigue is hear introduced and it consists of three branches including injection molding material development, standard injection plastic molding technique, and coded quality approval regularities. Realizability and reliability of the present technigue have been verified by sampling testing to expect to be wide applied in production.

scholarly journals Prototype Sistem Deteksi Partial Discharge Pada Isolasi Kabel Menggunakan Sensor Microphone (Prototype Of Partial Discharge Detection System In Cable Isolation Using Microphone Sensor)

2019 ◽  
Vol 3 (2) ◽  
pp. 206
Author(s):  
Mochamad Zaeynuri Setiawan ◽  
Fachrudin Hunaini ◽  
Mohamad Mukhsim
Keyword(s):  
Detection System ◽  
Partial Discharge ◽  
Measurement Data ◽  
Negative Ions ◽  
High Sensitivity ◽  
Sound Waves ◽  
Cable Insulation ◽  
Insulation Failure ◽  
Measurement Results ◽  
Discharge Detection

The phenomenon that often arises in a substation is the problem of partial discharge in outgoing cable insulation. Partial discharge is a jump of positive and negative ions that are not supposed to meet so that it can cause a spark jump. If a partial discharge is left too long it can cause insulation failure, the sound of snakes like hissing and the most can cause a flashover on the outgoing cable. Then a partial discharge detection prototype was made in the cable insulation in order to anticipate the isolation interference in the outgoing cable. Can simplify the work of substation operators to check the reliability of insulation on the outgoing side of each cubicle. So it was compiled as a method for measuring sound waves caused by partial discharge in the process of measuring using a microphone sensor, the Arduino Mega 2560 module as a microcontroller, the LCD TFT as a monitoring and the MicroSD card module as its storage. The microphone sensor is a sensor that has a high sensitivity to sound, has 2 analog and digital readings, and is easily designed with a microcontroller. Basically the unit of measure measured at partial discharge is Decibels. The results of the prototype can be applied to the cubicle and the way it works is to match the prototype to the outgoing cubicle cable then measure from the cable boots connector to the bottom of the outgoing cable with a distance of 1 meter. Then the measurement results will be monitored on the TFT LCD screen in the form of measurement results, graphs and categories on partial discharge. In this design the measurement data made by the microphone can be stored with microSD so that it can make an evaluation of partial discharge handling in outgoing cable insulation.

Real time prelocalization of underground single-phase cable insulation failure by using the sheath behavior at fault point

2011 ◽  
Vol 81 (10) ◽  
pp. 1936-1942 ◽  
Author(s):  
Thameur Aloui ◽  
Fathi Ben Amar ◽  
Nizar Derbal ◽  
Hsan Hadj Abdallah
Keyword(s):  
Real Time ◽  
Single Phase ◽  
Cable Insulation ◽  
Insulation Failure

scholarly journals Cable Insulation Failure Probability Analysis in Nuclear Power Plant Distribution Cabinet Fire

2018 ◽  
Vol 72 ◽  
pp. 01001
Author(s):  
Qiang Li ◽  
Jia-qing Zhang ◽  
Jin-mei Li ◽  
Shi-jing Ren
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Failure Probability ◽  
Power Distribution ◽  
Nuclear Power ◽  
Influential Factor ◽  
Plant Distribution ◽  
Cumulative Distribution ◽  
Cable Insulation ◽  
Insulation Failure

This paper takes the nuclear power plant power distribution cabinet fire as example and adopts FPRA methodology to analyse the failure probability of cable insulation at contiguous region among distribution cabinet. The influential factor that fire brigade dealt with the fire in the spot is considered in this research. The cumulative distribution function of fire brigade’s arriving and extinguishing time is conducted discretization, confirming the sample statistics of areas and establishing the numbers of cable insulation failure events of distribution cabinet fire. Combining failure predicted model of cable insulation and calculating the failure situation of cable insulation under each of fire background, obtaining the probability that cable insulation failure events among the distribution cabinet fires. The results show that the HRRmax of distribution cabinet fire in term of case scenario is 750 kW, the cable never happens the insulation failure; when the distribution cabinet fire is 1000 kW, the possibility of cable insulation failure is 12.6%.

scholarly journals Insulation Failure Prediction Model of Power Cable in Fire

2018 ◽  
Vol 72 ◽  
pp. 01002
Author(s):  
Jin-mei Li ◽  
Jia-qing Zhang ◽  
Qiang Li ◽  
Shi-jing Ren
Keyword(s):  
Heat Conduction ◽  
Prediction Model ◽  
Physical Model ◽  
Failure Prediction ◽  
Power Cable ◽  
Cable Insulation ◽  
Insulation Failure ◽  
Input Parameters ◽  
In Fire ◽  
Failure Temperature

With input parameters being determined, simplified physical model and heat conduction equation were adopted to establish a power cable insulation failure prediction model in fire, and the validation test was carried out. The internal structure of the cable was simplified to a one-dimensional physical model with three layers, to derive the calculation method of internal structure parameters of cable physical model. Differential equation of heat conduction, which could reflect the internal temperature of cable, was constructed based on basic assumptions, to establish a cable insulation cable failure prediction model with mixed layer heat diffusion coefficient, environment temperature change and insulation cable failure temperature as input parameters. The method to determine model input parameters was also proposed. ZR-YJV and SDR-1 cable thermal radiation furnace were selected in the experiments to obtain insulation failure temperature and time, as well as environmental temperature change of the cable. The experimental results showed that the constructed model had relative small error in predicting cable insulation failure time.

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