60M100-00
60M100-00
60M100-00
鉴于过电流（过载和短路）发生时的保护设备的动作配合问题占到辐射型低压电网保护装置配合要求的90%，有必要明确下列概念：
·过流选择性：
两个或多个过流保护装置之间的动作特性的配合。在给定的范围内出现过流时，指定在这个范围动作的装置动作，而其它装置不动作。
·完全选择性：
在两台串联的过流保护装置的情况下，负载侧的保护装置实行保护时，而不导致另一个保护装置动作的过电流选择性保护。
·部分选择性：
在两台串联的过电流保护装置的情况下，负载侧的保护装置在规定的过电流等级下实行保护时，而不导致另一台保护装置动作的过电流选择性保护。该过流限制值称为“选择性极限电流”
·后备保护：
两个串联的过电流保护电器的一种过电流配合。电源侧保护电器（一般是电源侧，但并非一定是电源侧电器）在有／无另一保护电器的帮助下实现过流保护，并防止另一个保护电器的过负荷”。对应于两个过电流保护电器的时间一电流特性曲线的交点处的电流值称为“交接电流”
ertificate based on ISO9001 certification,
EQnet quality based on ISO 9000/EN 29000 was subsequently achieved
Certification.
However, the Freelance 800F is more than technical excellence, I
We have also spent a lot of effort in proper planning, installation and revision too
This makes engineering design and maintenance faster, more economical and more efficient.
Industrial” is a world-leading all-round integrated open control system launched by ABB Group Automation Headquarters.
It integrates the advantages of traditional DCS and PLC in one body and supports a variety of international field bus standards. It has both the complex analog loop regulation capability of DCS
Power-friendly human-machine interface (HMI) and convenient engineering software, and at the same time have high-speed logic and sequence control equivalent to high-end PLC indicators.
control performance. The system can be connected to both conventional I/0 and various field bus devices such as Profibus, FF, CAN, and Modbus. system tool
It has a high degree of flexibility
