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How to choose household insurance and test switch?
Knife switch (Knife switch, referred to as KS), which uses a knife to switch on or off the connection between the power supply line and the load. Above the knife, there is a fuse that can be melted at high temperature. When a short circuit occurs, the fuse can be blown to cut off the power supply...Read more -
Arc extinguishing of vacuum circuit breaker
At the moment of vacuum circuit breaker breaking, due to the existence of the capacitance between the two contacts, the insulation breakdown between the contacts causes a vacuum arc. Due to the shape and structure of the contact, the vacuum arc column rapidly diffuses to the vacuum area outside t...Read more -
Precautions for low-voltage live working process
1. When performing low-voltage live work indoors or on the floor and equipment, the operator should stand on a dry wooden board or other insulating board, and wear insulating shoes when necessary. At the same time, you should wear gloves, hard hats, and long-sleeved clothing. Low-voltage l...Read more -
Illustration of the installation method of the outlet fuse cutout
Fuse cutout and load drop fuse are outdoor high voltage protection electrical appliances. It is installed on the high-voltage side of the distribution transformer or on the branch trunk line of the distribution line, and is used for short-circuit, overload protection and load current interruption...Read more -
Arc extinguishing method of fuse cutout
According to the different arc extinguishing materials and cooling methods of the fuse cutout, there are two arc extinguishing methods. The first arc extinguishing method is to put the melt into a sealed insulating tube. The insulating tube is made of a certain high-strength material. This...Read more -
Five types of insulation methods for high and low voltage switchgear
High and low voltage main unit insulation method 1. Heat shrinkable sheath The insulation performance between the main unit can be strengthened, but the sheath has the problem of insulation aging, and the heat dissipation conditions of the main unit become worse, which also increases the producti...Read more -
How does the medium voltage switchgear work when the switch cabinet is opened and closed
The medium voltage switchgear is a kind of electrical equipment. The external line first enters the main control switch in the switchgear, and then enters the sub-control switch, and each branch is set according to its needs. Such as meters, automatic control, motor magnetic switches, various AC ...Read more -
Three common questions about ring main units:
Three common questions about ring main units: 1. The meaning of R cabinet R cabinet. K cabinet. D cabinet The meaning of ring main unit in power design: (1) R cabinet represents the fuse cabinet, K cabinet is the load switch cabinet, D cabinet and B cabinet are fixed circuit breaker...Read more -
What points should be paid attention to in the work of sulphur hexafluoride (SF6) electrical equipment staff
Pay attention to the following points when working in a place where FS6 electrical equipment is placed: 1. The staff should not stay near the explosion-proof membrane of FS6 equipment; 2. Before the equipment is disassembled for maintenance, the staff should inspect the FS6 gas and take safety pr...Read more -
How to maintain the control cabinet of low voltage distribution cabinet?
In order to ensure the normal and safe operation of low-voltage distribution cabinet and equipment control cabinet, the maintenance group of mechanical and electrical installation and maintenance engineering department shall conduct a comprehensive inspection and maintenance of low-voltage distri...Read more -
Causes of common defects in 10kV high voltage switchgear
There are many 10kV high-voltage switchgear, and the application range is wide. If an insulation accident occurs in a 10kV high-voltage switchgear, the damage will be minor and the equipment will be damaged, and the serious will cause a large-scale blackout, causing irreparable losses to the coun...Read more -
Component composition of ring main unit Classification of ring main unit
Component composition of ring mainunit: Ring main unit (RMU) is a group of electrical equipment that high-voltage switchgear is installed in the steel plate metal cabinet or assembled into a bay type RMU. The core part of RMU is load switch and fuse Each ring main unit has 3 to 5 main switch boxe...Read more