Power control cabinet solutions
Power control cabinet solutions
Intelligent is the trend of power grid development, with the gradual improvement and implementation of relevant technical standards, the proportion of intelligent substation projects is also increasing. in wisdom.
In the process of building the energy substation, the outdoor cabinet is widely adopted. Smart control cabinets are installed outdoors to reduce the use of cables and fiber optic cables.
Reduce the interference caused by long cables, while reducing the area of the main control room, easy to facilitate the intelligent transformation of the old station. At the same time, due to the outdoor cabinet direct.
Exposed to the air, in order to ensure the operating environment of the equipment installed in the cabinet, the protection level of outdoor cabinets and environmental control put forward high requirements in recent years,
With the vigorous promotion and construction of the power grid, the demand for intelligent equipment such as intelligent substations, intelligent control cabinets and smart terminals is increasing.
Below is a look at the thermal control solutions for outdoor cabinets in power systems. It is divided into two aspects: humidity control and temperature control.
1.Humidity control —
For the general electronic equipment, the relative humidity in 30% to 80% is more appropriate, when the relative humidity exceeds 80%, will be made on the electronic equipment.
adverse effects: reduce the performance of insulation materials, rust metal devices, mold, etc. When humidity increases further, under certain conditions, it will be in the device.
The surface forms condensation, which seriously affects the normal operation of the equipment. Under certain temperature conditions, the higher the relative humidity in the air, the closer the temperature of condensation.
The ambient air temperature, the more prone the condensation is to occur.
There are generally two ways to dehumidify: one is to reduce the relative humidity by raising the ambient temperature, in the case of the water vapor content unchanged, and second, through the dehumidifier.
Equipment, pumping water vapor in the air, directly reduce the content of water vapor, at this time requires the outside of the cabinet completely isolated, no air circulation. For electricity.
System outdoor cabinet, generally using heating and dehumidification, you can meet the operating requirements of the equipment in the cabinet: through the temperature and humidity controller control heater to achieve division.
wet for the purpose.
2. Temperature control —-
From the current engineering applications, mainly using fan cooling, heat exchanger cooling two ways. The temperature control equipment in both ways is not in place.
Cooling function, the range of temperature control depends on the external ambient temperature. If the equipment is high in temperature, consider air conditioning refrigeration.
Compared to the heat exchanger, the cabinet air conditioner can regulate the temperature in the cabinet in a wider range while isolating the harsh environment outside. In addition to temperature and humidity, electronics.
The operation of the equipment is also affected by external conditions such as wind and sand, dust and salt spray. In the actual application, the use of thermal cooling depending on the specific situation of the project.
Outdoor control cabinets for the power industry.
-The standard distribution heating function.
-Integrated cover design.
-Professional dehumidification design to effectively control the relative temperature of applications.
-Low noise, micro-positive pressure design in line with grid specifications.
-4 to 20mA output ambient temperature, temperature signal.
-The temperature can be adjusted between 18-50 degrees, which solves the various disadvantages of ventilation and cooling.
-The automatic evaporation function of condensate is optional to solve the problem of condensate discharge efficiently.
-RS485 interface, supports MODBUS protocol communication for remote monitoring.
-It has a call-and-call function and provides a variety of alert and protection functions.
-Support sending alarm dry contact output.
-The LCD English and Chinese menu is displayed to facilitate the setting of parameters and view the alarm information.
-R134a eco-friendly refrigerant, in line with ROHS requirements.
-High reliability, 365 days/ year non-stop operation for more than 10 years.
-Full frontal maintenance, simple and convenient, reduce service costs.
-Strong corrosion resistance, IP55 protection.
-Can meet the different certification needs of customers.
The application case.