Kyn28a-12 Improvement Of High Voltage Switchgear - High Voltage Switchgear - Electrical Industry

Abstract: This paper KYN28A-12 High Voltage Switchgear In operation and test analysis

of some problems, and head for the cable, the second plug, the operation hole valve atresia Electromagnet Problems, the improved method.

Keywords: KYN28A-12 High Voltage Switchgear Cable Head Solenoid

KYN28A-12 also called armored remove the High Voltage Switchgear AC Metal enclosed switchgear. By the cabinet and in the whole-mounted components can be extracted (or Used) two major components, commonly known as the home cabinet. The compact, small footprint, handcart interchangeable for rapid fault, close is good, "Five Anti" fully functional, all operations can be carried out under the door closed, safe and reliable operation, maintenance by the users. But because of the switch cabinet structure and the quality of some components and other reasons, resulting in operation and there are some problems during the test.

1 switch cabinet first examine the electrical cable problems

1.1 Status and Problems Deqing Xiangongdianju related regulations on KYN28A-12 high voltage switchgear grounding switch operation were provided: verification of the line voltage does not then close the ground switch. As KYN28A-12 Switchgear closed, examine the electrical operation of the circuit when the switch cabinet must be carried out after the next door. In fact as KYN28A-12 High Voltage Switchgear locking performance with the electric shock, so only after closing the grounding switch can only turn on the switch cabinet next door. So when the switch to change from the run line maintenance (or switch and line maintenance) when the operating personnel can not directly use the electronic document inspection conducted on the test head electrical outlet cable. Personnel during the current co-operation Deqing Xiangongdianju ground before you switch, do not judge charged the line side is: Used in the Test position switch or maintenance location, live line display light does not. If you meet these two conditions are that no power lines, you can close the ground switch. In fact, this mode of operation there is a big security risk, especially in the current contact line 10kV power grid in more damage if the live display, then in accordance with the present methods of operation, contact line will be charged co-grounding switch may be serious consequences. In fact, this mode of operation in the "electric safety work rules" in the electrical inspection is defined as an indirect way of testing indirect power is only used for 330kV and above experience in electrical and electronic equipment. Therefore, for 10kV electrical equipment, electrical inspection should be done with direct experience in electronic document, charged only as a prompt displays the nature of the measures.

1.2 improvements Present KYN28A-12 High Voltage Switchgear, its next door latch is used in mechanical latch, when the grounding switch is closed, the next door to open. We can remove the existing mechanical locking device used to replace mechanical electromagnetic locks locking latch, shown in Figure 1. Electromagnetic Lock Power supply Taken to exchange Lighting Power supply And in the power circuit in series live line display contacts. When the live line, the live display off contacts, electromagnetic locks can not be excited, so under the door closed; when the line power failure, the live display contact closure, electromagnetic locks excitation, which can open the door for inspection under power, shown in Figure 2 said.

Figure 1 Improved locking device Figure 2 Electromagnetic Lock Circuit

Such improved utilization of existing conditions, do not need to do more changes can be implemented strong. Line power failure, you can open the door to the next inspection under power document into his cabinet, the cable head to examine the electrical outlet, eliminating the previous experience that does not directly power the operation mode switch to prevent the possibility of grounding live together.

by: gaga

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