One article covers PDU power knowledge in weak current engineering

The PDU power cabinet socket has a power distribution manager for power distribution and management functions. The PDU power socket is the first and most closely related component of the equipment operation. The quality of the PDU directly affects each device.

The PDU series cabinet socket type power protection lightning protection device is designed according to the IEC standard. It is designed to finely protect sensitive equipment of single-phase AC power supply. The PDU power cabinet is applied to the equipment side as the third-level protection of the power supply, so that the equipment is protected from lightning or electronic interference. Damage caused by transient overvoltages.

The power protection lightning protection device of the PDU power cabinet adopts two-stage series linkage protection, the maximum flow rate can reach 20kA, the voltage protection level can be as low as 800V, the input and output are compatible with multi-national standard plugs and various power matching, and the PDU power cabinet has recoverable. The overload protection device combines the lightning protection device with the power supply board.

In today's society, the Internet is developing rapidly. As the demand for bandwidth increases, the requirements for confidentiality and security of the network become more and more urgent.

The PDU (Power Distribution Unit) is a power distribution manager for the PDU that has power distribution and management functions. The PDU power socket is the first and most closely related component of the equipment operation. The quality of the PDU directly affects each device. PDU series cabinet socket type power protection lightning protection device is designed according to IEC standard. It is specially designed for fine protection of single-phase AC power supply sensitive equipment. It is applied to the equipment side as the third level protection of power supply, so that the equipment is protected from lightning or electronic interference. State overvoltage damage. The power protection lightning protection device adopts two-stage series linkage protection, the maximum flow rate can reach 20kA, the voltage protection level can be as low as 800V, the input and output are compatible with multi-national standard plugs and various power matching, and the overload protection device can be restored. The lightning device is perfectly combined with the power strip.

The PDU power outlet is a new type of socket device with a reliable safety factor. It is a power socket for receiving a DC power source and having a pin plug at the center of the plug insertion hole in various small electronic machines.

business background

Power Distribution Unit: Early foreign PDUs were mainstream and expensive. In the past few years, there have also been companies specializing in the R&D and production of such cabinet-specific power outlets (PDUs). Due to the high level of professional manufacturing of these domestic PDUs, the price has a clear advantage over foreign brands while ensuring good quality. It has quickly become the mainstream of the domestic PDU market. In recent years, with the development of the market, a number of PDU manufacturers have appeared rapidly in China, and R&D and imitation coexist, and the quality is uneven. (When selecting PDU products, you should be cautious. It is recommended to select products with long development time and undergo market inspection).

Product Features

Interface compatibility: The power socket hole module of the world standard system can meet the different needs of multi-national customers. Multi-purpose output jack and IEC output socket are suitable for plugs of different imported instruments and equipments in many countries. (Counter plug standards are different, please consult and check before buying)

1) It can realize double input, IEC socket input, product front panel input, product rear input, product end input, etc.

2) National standard, British standard, German standard, American standard and Indian standard with various specifications;

3) A variety of plugs such as 10A, 16A and industrial couplings are available.

International standard rack-mounting: Easy to install in 19-inch standard cabinets and racks, occupying only 1U of cabinet space, supporting horizontal installation (standard 19-inch), vertical installation (parallel installation with cabinet columns), also applicable to Other occasions;

Convenient and reliable installation performance: 19-inch standard design, easy to install. Fix the PDU firmly with a minimum of 2 screws. The PDU product can be adjusted to 180 degrees according to the needs of the user; the special L-shaped curved plate can also be used to adjust the PDU product to 90 degrees installation;

Multiple circuit protection functions: lightning strike, surge protection: maximum withstand current: 20KA or higher; limit voltage: ≤500V or lower; professional detection by Beijing Lightning Protection Test Center, can be used as fine surge protection for equipment side;

Alarm protection: LED digital current display and full-range current monitoring with alarm function;

Filter protection: pure power supply with fine filtering protection and ultra-stable output;

Overload protection: Provides two-pole overload protection, which can effectively prevent the problems caused by overload;

Anti-misoperation: PDU main control switch ON/OFF with protection grille to prevent accidental shutdown and provide optional two-way

The leading edge of modular PDUs

Ideal for dynamic data centers that are ideal for zui's high power and space efficiency, the modular PDU and docking station are specifically designed for 1U fixed servers with a unique architecture. This new design includes a short cable on the docking station. This new modular PDU allows users to distribute power to the rack to reduce cable tangling. This PDU has a unique modular structure that allows the user to effectively distribute the power output interface along the rack, making it easier to install and increasing the number of outlets. This new high-amplitude PDU gives users the flexibility to place modular units in different locations on the stand without worrying about sacrificing valuable rack space.

Compared with ordinary power strips, cabinet sockets (PDUs) have the following advantages: more reasonable design, stricter quality and standards, long safe and trouble-free working hours, excellent leakage and over-current overload protection, and plug-in The action is frequent and not easy to damage, the heat is warmed up small, the installation is more flexible and convenient, and it is suitable for industrial customers who have strict requirements on electricity consumption. It also fundamentally eliminates the potential safety hazards caused by frequent power failures, burnouts, fires, etc. caused by poor contact and small load.

Note on selecting a PDU:

1) Choose the product that suits you according to your specific situation;

2) Select the products of regular manufacturers (of course, some manufacturers may also be regular manufacturers, but PDU may not be its superior product. It should be cautious when choosing. Although a veterinarian is also a doctor, he can't think that he is a famous doctor as long as he is a doctor. You can't find a doctor. he);

3) The state has relevant quality inspection and certification for various products. When selecting PDU products, we must first look at the qualifications of the manufacturer, then look at the quality certification of the products, and choose a regular product with higher safety;

4) After synthesizing the above, we will understand the after-sales service of related products (no matter how good the product is, there is no guarantee that there will be no bad time, so after-sales service is also a key issue; and the after-sales service can not only be said by the mouth, it is recommended to take root. , pay for the text.

Focus on PDUs in different periods of computer room construction

Planning period selection: Many equipment rooms do not have the same PDUs as UPS, column cabinets, cabinets, etc., and the PDU parameters are very unclear. Some even indicate the power strip, so it will work later. It caused a lot of troubles: it could not match other equipment, non-standard power distribution, serious budget shortage, etc. This phenomenon is mainly caused by the bidding parties are not clear how to label the required PDU? Here is an easy way for you:

1) circuit power of the distribution branch of the head cabinet + safety margin = the sum of the power of the PDU on this line;

2) The number of devices in a cabinet + safety margin = the number of jacks of all PDUs in the cabinet. If there are two redundant lines, the number of PDUs should be doubled with the parameters.

3) Distribute high-power devices in different PDUs to balance the phase currents;

4) Customize the hole type of the PDU based on the device plug that cannot be separated from the power cable. If the device plug that can be separated from the power cable is not compatible, replace the power cable to solve the problem;

5) The equipment density in the cabinet is high, the PDU is suitable for multi-jack vertical installation, the equipment density in the cabinet is low, and the PDU is selected to be less jacked horizontally. Finally, the PDU should be given a separate quotation budget to avoid serious budget shortage.

Installation and commissioning

1) The power of the power distribution socket in front of the cabinet should match the circuit power of the distribution unit of the column head cabinet and the power of the PDU, otherwise the power consumption index will be lowered;

2) Horizontal PDU must be reserved for the installation U-bit of the PDU. When installing the cabinet, the position of the side traverse plate of the cabinet should be aligned with the installation size of the PDU.

3) The double-circular European standard plug can not be directly inserted into the universal hole, so the grounding will be suspended, which is very dangerous. The correct way is to replace the plug or use the embedded European standard jack, and then do not use the European standard to convert the national standard conversion line.

C: Run time:

1: Pay attention to the temperature rise indicator, that is, the temperature change of the device plug and the PDU jack;

2: If there is a remote monitoring PDU, you can pay attention to the current change of the PDU to judge whether the device works normally.

3: Make full use of the PDU cable management device to decompose the outward escape force of the device plug to the jack.

PDU purchase

1) Integrator: Familiar with the equipment room condition, complete matching, overall settlement, and high price. 2) Equipment manufacturers: With the sales equipment such as: servers, routers, switches, etc. can accurately match the jack form and power parameters, and the equipment is packaged and settled, the price is medium.

3) Cabinet factory: The cabinet factory is a factory that does sheet metal. It has no production qualification for electrical equipment, especially the PDU of the cabinet factory. The quality control and product changes are poor, the price is chaotic, the fish and the dragon are mixed, it is difficult to identify, but the installation Convenience. Packed and settled with the cabinet.

4) Professional power suppliers: such as column head power distribution cabinets, PDU professional sellers, can get professional guidance and help, flexible customization, configuration specifications, high security, low price, just to settle separately.

5) Domestic and foreign brands: complete foreign brand certification, quality assurance; but high price, long delivery period, generally 6-8 weeks, single jack form, poor compatibility with equipment plugs, standard model products, can not be customized The domestic high-end brand parts are complete in certification, the factory has complete qualifications, the products are inspected one by one, the price is medium (equivalent to 1/3~1/2 of the international brand), the service is complete, the product customization is high; and the domestic low-end brand : The component certification is incomplete, the quality stability is not high, most of them are products that are speculatively assembled by the speculative small factory. The factory is not qualified or assumes the qualification of others. The parameters are chaotic, the behavior is bold, some can be customized, and the price is extremely low. Instead of using this PDU, it is better to use an authentic high-end brand wiring board.

6) Actual purchase: Select PDU first to see the manufacturer's qualification: factory certification documents to ensure the reliability of processing; second look at product qualifications, inspection documents, product specifications, identification plates, etc., to ensure product standardization . The PDU is a customized product for the power distribution of the equipment room. The matching experience value of the power supply of the equipment room is the most valuable. Therefore, the manufacturer's working years are an important indicator to check the stability and professionalism of the PDU product. Pre-sales guidance: Is there any pre-sales guidance that is an important sign of PDU manufacturers' professionalism? If you don't have professional guidance when you choose and customize, you will pay the late cost: equipment can't use electricity, power matching is insufficient, grounding is bad, even Burning equipment, power supply line interruption will also accompany you.

PDU power description

The rated power of the PDU is the sum of the output power of all the output jacks of the PDU. Its size depends on the following key points. Their ordering should be like this:

The carrying power of the plug ≥ the carrying power of the main switch ≥ the carrying power of the external line = the carrying power of the main line of the inline ≥ the carrying power of the total overload protection ≥ the sum of the carrying power of the output jack ≥ the rated power of the PDU.

That is to say, if one of the above key points increases the load power of the single point, it will not increase the rated power of the PDU. However, if the load power of a single point of one of the above key points is reduced, the PDU will be rated. The power is reduced to a minimum of one-point load power at one of several key points.

Relationship between the form of the PDU output jack and the rated power of the PDU:

When we use the PDU, we encounter a situation where the plug of the device does not match the jack of the PDU. Therefore, when we customize the PDU, we should first confirm the plug form of the device and the power of the device. The order of the bearers is as follows:

Output jack power of the PDU = plug power of the device ≥ power of the device.

The correspondence between the plug and the jack is as follows:

Universal jack: Corresponding to CCC10A GB plug; Small South Africa 6A plug; Italy 10A plug:

American standard 5-15P plug; European standard 10A plug (no grounding); Danish standard 10A plug;

Israel 10A plug; Switzerland 10A standard plug; 10A Australian standard plug

When your device plug does not match the PDU jack and the PDU has been customized, you can replace the power cord of the device, but be sure to note that the power of any plug and power cable must be ≥ the power of the device.