Is the dehumidifier in the switchgear standard in the switchgear?

Hello, the switch cabinet dehumidification device is a new type of semiconductor condensation technology dehumidification equipment, now 80% of the electrical cabinet needs to install the dehumidification device, has become the standard. The device is equipped with a high-precision temperature and humidity sensor, which monitors the temperature and humidity value in the cabinet in real time and automatically runs according to the set parameters, which is intelligent and efficient. It is widely used in power supply companies and switch plants.

This depends on the situation, if there is condensation, moisture, rust, corrosion and other phenomena in the switch cabinet, it is necessary to install the switch cabinet dehumidification device, although some people have installed a heater, but the heater only improves the condensation point of moisture in the air, but its water content has not decreased, if it encounters a large cooling or the equipment stops running, then the cabinet will instantly condense dew, so it is best to determine whether to install the switch cabinet dehumidification device according to the geographical location of the site installation and whether there is moisture in the cabinet, we are doing matching, Some places need to be installed, some places do not need to be installed, we installed a smart switch cabinet dehumidifier, this SPR-CN-S1 intelligent dehumidifier, we have experimented, the effect is good.

This is not necessarily, there is a need for dehumidification can be installed in the switch cabinet dehumidification device, such as SPR-CN-S1 intelligent dehumidifier, the dehumidification device is developed according to the dehumidification treatment of the humid air accumulated for a long time in the electrical cabinet, and according to the design principle of small size and portable installation, modular structure design. The dehumidification method uses semiconductor refrigeration technology to reduce the relative humidity in the cabinet by creating condensation conditions locally, and directly discharge condensated water. The power supply of this device is also powered by AC-DC wide-range switching power supply module, which can ensure the normal operation of the device at a low ambient temperature.

The installation principle is that within the safe insulation distance, the middle and bottom of the cabinet wall, opposite the heater, and the power supply and power supply are easy to lay. For the discharge of condensate, a drainage pipe is laid to collect the condensate from all dehumidification devices and discharge it into the outdoor PPR water pipe.

High voltage cabinet: The front instrument room, and the rear cable room have heating plates and humidity probes. Most low-voltage cabinets don't seem to have a dehumidifier.

This is not necessarily, it depends on your own needs.

The drier the better, if the humidity is too high, many places inside the switch cabinet are easy to condense (especially glass), and accidents are easy to occur; In addition, if the temperature and humidity are high, it is easy to destroy the insulation of switches and equipment.

The humidity conditions are as follows:

The average relative humidity measured over a 24-hour period does not exceed 95%;

The average monthly relative humidity does not exceed 90%.

Condensation can sometimes occur under such humidity conditions.

Note 1: Condensation occurs during periods of high humidity and when the temperature drops sharply.

Note 2: In order to withstand the effects of humidity and condensation, such as insulation breakdown or corrosion of metal parts, the user should use high-voltage switchgear designed and tested under these conditions

Note 3: If the high-voltage switchgear designed and tested according to the conditions required in 2 is not used, a specially designed building or small room can also be used, with appropriate ventilation and heating, or a dehumidification device can be installed to prevent condensation.

Excessive humidity in the switch cabinet causes short circuit, flashover, burning, this time it is necessary to do dehumidification treatment, if the table is dry and easy to generate static electricity, if it is the installation of dehumidification device, it is recommended to set the humidity starting threshold to about 50%rh.

It is better to have low humidity, the average daily relative humidity is 95%, the average monthly relative humidity is 90%, if it is in a humid environment, it is necessary to install a condensation control device, including a set of equipment such as heating plates and fans.

1. Cable trench plugging repair.

If the area where the substation is located belongs to the thunderstorm season in summer, it is necessary to strengthen the inspection and repair of the outdoor cable trench plugging, and take materials with good waterproof performance to repair in the repair process, and carry out the corresponding waterproof plugging treatment at the intersection of the wall where the cable trench enters the switch cabinet room, so as to prevent the phenomenon of backfilling due to the accumulation of water in the cable trench. In addition, in the daily inspection, the opportunity of the switch power failure is used to repair the blockage between the cable trench in the switch room and the switch cabinet, and the bottom of the switch cabinet that is easy to enter the moisture is blocked with flame retardant materials, and if the cable is seriously waterlogged, the cable trench dehumidification system can be installed in the cable trench for overall dehumidification.

2. Install a dehumidification device.

Because the switch cabinet is usually installed with corresponding protection devices, and these protection devices have higher requirements for parameters such as temperature and humidity in the operating environment, so air conditioning is usually required to be installed in the switch room to adjust the indoor temperature, but because the air conditioner usually has poor dehumidification function, and even in the process of using air conditioning refrigeration due to the high external temperature in summer, it is easy to cause condensation due to the temperature difference inside and outside the switch cabinet. Therefore, it is necessary to set up an industrial dehumidifier in the switch room, and when the indoor humidity exceeds 50 55, it will automatically start dehumidification to control the indoor humidity at about 50. If this method can not achieve the due dehumidification effect on the inside of the switch cabinet in time, a small switch cabinet dehumidifier (SPR-CN-S1 intelligent dehumidifier) can also be installed in the cable compartment inside the switch cabinet, the intelligent dehumidifier is developed according to the dehumidification treatment of the humid air that has accumulated for a long time in the electrical cabinet, and the state and the state are designed according to the design principle of small size and portable installation, modular structure design.

The dehumidification method uses semiconductor refrigeration technology, which reduces the relative humidity in the cabinet by creating condensation conditions locally, and directly discharges the condensation water, which is safe and convenient. If there is condensation in the bus room, generally not to install a dehumidification device in the bus room, you can consider Li Sui's consideration of installing an overhead dehumidification device on the top of the bus room, such as the HK-Sepri-Q type overhead dehumidification device is specially designed to dehumidify the bus room of the switch cabinet, generally installed on the top of the bus room, and the moisture in the bus room is atomized into the air through ultrasonic waves through a hole at the top of the bus room.

The dehumidification principle of the switchgear intelligent dehumidification device (SPR-CN-S1 intelligent dehumidifier) is to condense the humid air in the cabinet into water and directly discharge it out of the cabinet by creating condensation conditions locally, so as to gradually reduce the humidity in the cabinet, fundamentally solve the internal humidity of the electrical cabinet and inhibit the generation of condensation. It can effectively reduce the humidity of the ambient gas in the cabinet to avoid condensation on the surface of electronic components, and discharge out of the cabinet through the diversion pipe, reduce the risk of high-voltage breakdown of insulating devices, improve the reliability of the device, and fundamentally solve the common humidity problem of the electric cabinet with the intelligent dehumidification device in the cabinet.

The intelligent dehumidification device (SPR-CN-S1 intelligent dehumidifier) has the characteristics of high precision, low energy consumption, low noise, stable dehumidification performance, remarkable dehumidification effect, and automatic control of humidity. Small size, easy to install; Low power consumption, energy saving and environmental protection.

Depending on the type of switchgear, the matching dehumidifier is also different.

If the internal space of the switch cabinet is sufficient, you can choose SEPRI-CS-NL(B) drainage dehumidifier 200*116*95, or anti-condensation device, if the internal space of the switch cabinet is not very sufficient, you can use SEPRI-CS-NL(E) small intelligent dehumidification device 158*95*60, if there is no insufficient space in the switch cabinet, then you need to use the overhead dehumidification unit.

Of course, you can also install a large industrial dehumidifier from SEPRI-CS in this distribution room to ensure the ambient humidity of the switchgear.

Switchgear dehumidifier is a kind of small intelligent dehumidification equipment used in substation switchgear or terminal box, sink control cabinet, power cabinet, mainly semiconductor condensation type dehumidifier, today Sapur summarizes some switchgear dehumidifier working principle and use methods, etc., I hope it can be used as a reference material to facilitate your future purchase and use, and help you better solve the problem of switchgear damp condensation. What is a switchgear dehumidifier.

Switchgear dehumidifier (SPR-CN-S1 intelligent dehumidifier) is one of the application categories of semiconductor dehumidifier, switchgear is an electrical equipment, the main role of switchgear is to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and power conversion in the power system. At present, most of the switchgear will encounter the problem of moisture condensation more or less in the process of use, the humidity of the switchgear is an important indicator of the electrical operating environment, the humidity requirements depend on the sensitivity of the electrical operation to the air temperature and humidity, and the ambient humidity range of the general electrical equipment operation requirements is about 50%. The selection of the switch cabinet dehumidifier is based on the area, height, target relative humidity, initial relative humidity and so on of the dehumidifier application cabinet space, and calculates its overall cooling capacity, total wet load, heat load, etc., and then obtains the matching switch cabinet dehumidification capacity and model.

The switch cabinet dehumidifier is actually a dehumidification device that can be used for dehumidification in the cabinet, which is generally intelligent, and the dehumidification method mostly uses semiconductor condensation to dehumidify.

1.The selection of switch cabinet dehumidifier should pay attention to the brand.

Switchgear dehumidifiers are generally used as durable consumer goods, and consumers need the manufacturer to provide after-sales service to inspect, repair or replace parts when they fail during use. The manufacturer of well-known brand switchgear dehumidifier has a complete set of quality management system, has a good product quality assurance ability, and its products have a certain guarantee in terms of performance and safety.

2.The selection of switch cabinet dehumidifier should pay attention to the dehumidification capacity of the product.

When purchasing a switchgear dehumidifier, the ability to choose a switchgear dehumidifier is generally calculated according to the volume of the cabinet. Normally, a 60W switchgear dehumidifier SPR-CN-S1 intelligent dehumidifier can dehumidify up to one cubic meter. Generally, two sets of SPR-CN-S1 intelligent dehumidifiers can be used for the conventional type of KYN28 cabinet, and 2-4 sets of switch cabinet dehumidifiers and SPR-CN-S1 intelligent dehumidifiers can be installed in larger cabinets.

3.The selection of switch cabinet dehumidifier should pay attention to the quality of the product.

Switchgear dehumidifier, its composition consists of: shell, fan, condensing equipment, evaporator, fan, control system and other accessories, the main core of product performance is the equipment capacity of condensing equipment and dehumidification system, and the quality of the product is mainly control system, fan as the core.

After considering the above aspects, you can choose a switch cabinet dehumidifier with ideal dehumidification effect, which can make the use more ideal.