What is the role of a DC system in a substation? Answer: The DC system provides reliable DC power supply for control signals, relay protection, automatic devices and accident lighting in the substation, and also provides reliable operating power for operation. The reliability of the DC system has a significant impact on the ...

What is Phase Order? Answer: It is the order of the phases, which is the sequence in which the instantaneous value of alternating current changes from negative to positive through zero What is the safety distance of the human body grounding point when a grounding fault occurs in high-voltage equipment? A: Indoor should be larger than 4 m, outdoor should be larger than 8 ...

Which electrical equipment must be grounded or zeroed? Answer: (1) The base and shell of generators, transformers, motors, high and low voltage electrical appliances and lighting appliances; (2) the secondary coil of the transformer; (3) the framework of the switchboard and the control panel; (4) Transmission device of electric equipment ...

What to do if you notice someone electrocuted? Answer: First of all, make the electrocuted person quickly disconnect from the power supply. Its method, for low-voltage electric shock, can be used "pull", "cut", "pick", "pull", "pad" method, pull or cut off the power supply, the operation should pay attention to avoid people rescue people electric shock, should ...

Recently, Rittal participated in the supplier conference held by KONGSBERG China, and KONGSBERG awarded Rittal China the 2022 "Outstanding Contribution Award". As a global strategic partner of Rittal, Kongsberg Marine is a global leading maritime technology company, providing services for merchant marine, offshore engineering, ...

1. The cabinet door is 25mm from the ground and 2.5mm thick mounting plate, and there are 20mm wide U-shaped curved edges on both sides, which makes the mounting plate stronger and easy to handle. 2. The three cable introduction cover plates at the bottom of the box can be replaced with each other, which is easy to move, easy to import cables, and easy to open holes into the line. 3 ...

1. The first is to measure how long the line is. According to the decision is to put the location of the distribution frame, and then combine the distance of the cable from the outside into the cabinet and so on to calculate how long the network cable needs to be put on the distribution frame and install the cabinet, so as to facilitate the overall cable management behind.

With the development of data centers in the direction of more intelligent and high reliability, the information stored in the servers in the IT cabinet is becoming more and more important, and the operation and maintenance of the data center needs to be able to manage the door opening of the cabinet more effectively to avoid server downtime caused by human factors. Traditional Mechanical Cabinet Locks ...

1. Reliable quality assurance Choosing the right server and cabling cabinet is important, and the slightest negligence can lead to huge losses. No matter which brand of product it is, quality is the first thing that users should consider. 2. Load-bearing guarantee With...

1. In principle, the power cord and network cable of the cabinet should be sorted out separately; 2. The placement of the equipment should be appropriate, avoid squeezing each other, avoid being too high or too low, and avoid being too close to each other; 3. If there are too many devices in the cabinet, the equipment should be numbered; 4. For each line ...

1. Preliminary preparation First of all, notify the user to label the cable and organize the cabinet without affecting the normal operation of the user. Then, according to the topology of the network, the existing equipment, the number of users, the user group and other factors, the internal lines of the cabinet are delineated.

First, the waterfall shape This is one of the older wiring patterns that can sometimes be seen. It adopts the artistic image of "Huaguo Mountain Water Curtain Cave", and directly hangs the twisted pair from the module of the patch panel, and there is a very beautiful sense of hierarchy when it is neatly distributed (24-48 per layer).

1. The weight of the cable in the industrial control cable drag chain should be evenly distributed, so as to avoid accidents caused by uneven weight during operation, and the principle of distributing the cable is that the heavier one is located on both sides and the lighter one is located in the middle. All industrial control cables must be securely fastened to one end of the energy chain, so that ...

Fulfillment of the requirements of many electrical appliances: In the manufacture of industrial control cables, the relevant standards for the transmission of various information are fully considered. This ensures that the industrial control cables can meet the performance requirements of many electrical appliances in their daily work. Abrasion Resistance: Industrial Control ...

1. Flashover fault: The industrial control cable is in a good insulation state at low voltage and will not have a fault. However, as long as the voltage value rises to a certain range, or a certain voltage continues to rise after a period of time, then it will instantly break through the insulator and cause flashover fault. 2. Long-term ...

1. External force damage. Judging from the operation analysis in recent years, especially in Haipudong, which is developing rapidly, a considerable number of cable failures are caused by mechanical damage. For example, the cable laying and installation is not standardized, which is easy to cause mechanical damage; Engage in direct burial on cables ...

1. DC cable (1) Tandem cables between components. (2) Parallel cables between strings and between strings and DC distribution boxes (combiner boxes). (3) The cable between the DC distribution box and the inverter. The above cables are all DC cables, outdoor laying ...

Usage code - not marked as power cable, K- (control cable), P- (signal cable); Conductor material code - not marked as copper (can also be marked as CU), L- (aluminum); Inner Sheath Code – Q-(Lead Packed), L- (Aluminum Cladding), H- (Rubber Jacket), V-(Polyvinyl Chloride ...

1. SYV: solid polyethylene insulated RF coaxial cable, coaxial cable, radio frequency signal transmission in wireless communication, broadcasting, monitoring system engineering and related electronic equipment (including comprehensive coaxial cable) 2. SYWV(Y): Physical Foamed Polyethylene Insulated Cable TV System Cable, Video ...

Flame retardant rubber sheathed cable 1. Use This product is a series of mining rubber sheathed flexible cables. It is suitable for power connection of shearers and similar equipment devices with rated voltage Uo/U of 1.9/3.3KV and below. It is mostly used in coal mines. 2. Conditions of use Long-term core ...

Power system The wire and cable products used in the power system mainly include overhead bare wires, busbars (busbars), power cables (plastic cables, oil-paper power cables (basically replaced by plastic power cables), rubber cables, overhead insulated cables), branch cables (replacing part of the busbars) ...