1.According to the circuit breaker installation method (1) Removable type or handcart type (represented by Y) It means that the main electrical components (such as circuit breakers) in the cabinet are installed on the drawable handcart. Because the handcart cabinet has good interchangeability, it...

Five defenses of high voltage switchgear 1. After the vacuum circuit breaker trolley in the high-voltage switch cabinet is closed at the test position, the trolley circuit breaker cannot enter the working position. (to prevent closing with load) 2. When the grounding knife in the high-voltage swi...

Product Description For oil-immersed transformers of 1000kVA and above, outdoor thermometer-type signals should be installed, and then long-distance signals. Oil-immersed transformers of 800kVA and above should be equipped with gas relays and pressure protection devices. Oil-immersed transformers...

Cause of cable fire and explosion 1. The cable head burns Because the surface of the cable head is damp and dirty, the ceramic sleeve of the cable head is broken and the distance between the lead wires is too small, which leads to flashover and fire, causing the surface insulation of the cable he...

Nominal diameter of heat shrinkable tube: The key of the heat shrink tube is to be used as a preventive product for the cable. The cross section of the heat shrinkable tube is a cylindrical tube shape, so the nominal diameter is the size of the inner diameter of the wall thickness. This main para...

Cold-shrinkable sleeve products can provide a safe protection and give a sealed connection to the communication coaxial line. It is commonly used as a moisture-proof rubber seal at the junction of communication base stations, wireless communication towers and other exposed coaxial lines. The cold...

Nowadays, many companies will consider the application of heat shrinkable sleeves as insulating waterproof sleeves? Whether the heat shrinkable sleeve is the same as the insulation involves many electronic component processing plants. As one of the key parameters of the heat shrinkable sleeve, th...

Oil-immersed transformer is a new type of high-performance transformer. Oil is used as the main insulation method of the transformer. The main components are composed of iron core, winding, radiator, etc., and are widely used in the power industry. Dry-type transformer is a transformer whose iron...

When a short circuit occurs or there is an open fire nearby, the commonly used XLPE power cables will be caused by flames, and the fire will be more serious, especially when multiple cables are laid in a concentrated manner. Therefore, it is very important to take reasonable fire protection measu...

Fuses are the simplest protective electrical appliances, which are used to protect electrical equipment from damage from overload and short-circuit current; choose different types of high-voltage fuses according to installation conditions and uses, such as outdoor drop type, indoor type, and high...

In the long-term use of zinc oxide arresters, insulation aging often occurs. It may look normal on the outside, but the interior is not suitable for continuing to work. Therefore, it is necessary to check the insulation performance of zinc oxide arresters in time. Zinc oxide arrester tester is us...

1. Flow capacity This is mainly reflected in the arrester’s ability to absorb various lightning overvoltages, power frequency transient overvoltages, and operating overvoltages. 2. Protection features Zinc oxide arrester is an electrical product used to protect various electrical equipment ...