## 1 Introduction
The current differential is performed for monitoring and classification part of units between load and DG, which are energised during fault occurrences [19; 20]. There are issued methods for protection with DG connection which have the type of bi-directional and islanding detection [21; 22]. In addition, anti-islanding detection is to make the step-voltage regulator device, which causes by under and over voltage by utilising at synchronous DG. This method is provided for making clearly fast fault of proper relay-fuse coordination of each DG on IEEE 33-bus [23; 24]. Two aspects of the coordination protection scheme [25; 26; 27], such as the behaviour DG sizing placement [28; 29] and the operation process, are concerned with either connection or disconnection devices to the radial distribution network. For reinforcement of the optimal protection scheme, the configuration setting will be improved by the existing system [30]. In [31], fault management is performed to reduce the DG impact on the grid connection. Despite the reconfiguration being purposed, many factors on the system, such as protection coordination, network operation, DG sizing, and soft opening points (SOPs), are approached the constraint of formula on the system [32; 33]. To propose the optimal protective coordination (OPC) in the single-phase without DG connection, there has to be considered the time operation period. Afterward, the Coordinate Protection Index (PCI) by considering the power flows and downtime for operation [34]. The protection coordination schemes are proposed, including many techniques and solutions, for increasing the performance in fault situations on the distribution system. The self-adaptive protection is proposed for maintaining the time dial at the recloser and fuse equipment in the operation mechanism. Studies are utilised to protect both phase and ground sides at real-time, which show better operating and interval timings on the IEEE 34-bus system [35; 36]. Besides, the enhancement of protection with recloser-fuse coordination that provides by using Integer linear programming (IP) that is to be found the fault transmitter (FT) on the distribution system. The fuse-saving and costing of benefits can be reduced total fault interrupting duration [37; 38]. In [39], the economic impact of protecting system scheme development is considered. The fault controller by the fault ride-through (FRT) constraints [40], which can operate in over various fault levels and locations of the system. The author of [41; 42] proposed the adaptive optimal coordination for reaching the over current relays (OCRs) at the power distribution system. It can increase the reliability of the protection system. Based on the results, this proposed study can reduce the operation of OCRs to lower conventional than 54.2% as a comparison in various conditions. In addition, a CPU processor for controlling the smart over current relays, which can be prohibited by any unwanted tripping and incorrect miscoordination of protective devices on the distribution feeder [43]. Furthermore, in both studies [44; 45; 46; 47], the proper restoration technique for protecting coordination prior the fuse melting and burning out, which is to classify and relies upon peer-to-peer communications that only reduces the numeral of relay aspects layer only. Nevertheless, previous studies proposed a number of methods to improve the protection scheme based on individual devices. Thus, the configurations for protection devices are not presented and coordinated with all devices and DG connection. Therefore, the solutions are proposed to address the malfunction of priority protective devices operating. The contributions of this study are as follows:  
1. To improve the protection system by minimising the serious effect of fuse-link failures during high fault conditions and managing the protection coordinate scheme between recloser setting and fuse-link sizing verifications;
2.