How to prevent condensation in electrical enclosures
Condensation I believe that everyone has encountered in daily life, such as autumn morning on the roadside leaves and flowers on the water, the water on the water bottle in the refrigerator, they are condensation. What exactly is condensation? Condensation means that when the ambient temperature is lower than the dew point temperature of the relative humidity of the air, the water vapor in the air condenses into water droplets. Under the same environmental conditions, when the relative humidity of the air is higher, the dew point temperature is closer to the temperature of the ambient air, and condensation is easy to form. Once the condensation adheres to the insulation surface, the insulation performance will decline.
Analysis of causes of condensation in electrical enclosures
The electrical components inside the switch cabinet have been working continuously to generate heat, and a large amount of water vapor inside eventually condenses to form condensation. In addition, for safety protection considerations, the electrical enclosures seal is better, its heat dissipation is poor, will also lead to condensation, and condensation attached to the insulation surface to accelerate the deterioration of the insulation medium, causing circuit breaker trip or electrical equipment damage. Through the research on the operation of the electrical enclosures for several years, the problem of discharge and heating of the equipment is very prominent, and a large part of the reason is that the dehumidification and cooling effect of the electrical enclosures is not good. The generation of condensation greatly reduces the insulation performance of the electrical enclosures electrical equipment, resulting in equipment damage and even casualties.
Electrical enclosures condensation hazard analysis
Humidity and temperature are two key factors that determine whether condensation can form, so they have an important impact on the insulation performance of electrical equipment. For the electrical equipment in the switch cabinet, the best humidity should be maintained between 30% and 60%, because if the humidity exceeds 60%, it is easy to form condensation, which adversely affects the insulation performance of the electrical equipment. Because when the water vapor enters the high voltage switch cabinet, it will be electrolyzed into hydrogen ions and oxygen ions by the strong electromagnetic field in the switch cabinet, especially by the tip discharge process at the cable and copper bar connection, and oxygen ions will combine with oxygen molecules in the air to undergo a chemical reaction, resulting in ozone. Ozone, weak acid corrosive gas on the insulation material for a long time will lead to the decline of electrical equipment insulation performance in the high voltage electrical enclosures. In addition, the water vapor will also condense into crystalline water on the surface of the insulating material, causing a short circuit of the line and reducing the insulation performance of the switch cabinet.
Electrical enclosure condensation treatment scheme
1.BBS anti-condensation sealingmaterial
BBS anti-condensation sealing compound is composed of a highly active chemical substance. It is designed to be composed of two components, mixed in the field, and can be leveled after uniform pouring, and then rising and curing. The product has good flow sealing, heat insulation, flame retardant, durability and easy expansion. Used at the bottom of electrical and communication cabinets, it plays an airtight sealing role, can effectively prevent water and water steam from passing through, and block the moisture source generated by condensation.
Product characteristics
- Air tightness: effectively prevent the passage of moisture, smoke, gas and liquid water.
- Flow tightness: After mixing, the material remains liquid for no less than 5 minutes, fully leveling and immersing between cables and pipes, and then rising and pushing between complex cables or supports to fill the entire irregular surface. It has excellent sealing properties after curing.
- Adiabatic property: the cured material has good adiabatic property, which can effectively isolate heat conduction.
- Positive flammability: not less than B1 flame retardant performance specified in GB 8624 2012.
- Durability: continuous value from -25℃ to +93℃; -40℃ ~ 120℃ peak temperature and common acid and alkali environment, 20 years can maintain good physical and chemical properties, and small animals do not chew.
- Easy dilatability: double opening is convenient and no special tools are required.
- Green environmental protection: low smoke, no halogen, no VOC substances.
- Long shelf life: The shelf life of the components can reach 12 months.
2.Insulation cotton
DFC insulation cotton belongs to the field of polymer materials. It is a kind of high-tech product composed of high efficient hydrophilic polymer chain segment grafted by cotton-like material substrate. It has good water absorption, water locking, moisture resistance and durability. Mainly used to paste on the top of the cabinet, can effectively prevent the top of the cabinet condensation and water dripping.
Product characteristics
- Flame retardant: refractory material itself
- Water absorption: Water absorption volume can reach 1000kg/m3 or more
- Water lock: In the case of saturated water absorption, under 100% humidity conditions, no transparent water dripping
- Heat insulation: It has a certain ability to isolate heat, which can reduce the temperature difference between its surface temperature and the air inside the electric cabinet, and weaken the conditions for condensation formation
- Durability: Good physical and chemical properties can be maintained within 20 years of use
- Simple installation: remove the adhesive and paste it. At key nodes, permanent magnet components can be used for local reinforcement, which is safe, fast and durable
2.Insulation cotton
DFC insulation cotton belongs to the field of polymer materials. It is a kind of high-tech product composed of high efficient hydrophilic polymer chain segment grafted by cotton-like material substrate. It has good water absorption, water locking, moisture resistance and durability. Mainly used to paste on the top of the cabinet, can effectively prevent the top of the cabinet condensation and water dripping.
Product characteristics
- Flame retardant: refractory material itself
- Water absorption: Water absorption volume can reach 1000kg/m3 or more
- Water lock: In the case of saturated water absorption, under 100% humidity conditions, no transparent water dripping
- Heat insulation: It has a certain ability to isolate heat, which can reduce the temperature difference between its surface temperature and the air inside the electric cabinet, and weaken the conditions for condensation formation
- Durability: Good physical and chemical properties can be maintained within 20 years of use
- Simple installation: remove the adhesive and paste it. At key nodes, permanent magnet components can be used for local reinforcement, which is safe, fast and durable
3.Construction method
Clean the adhesive surface on site, cut the dew insulation cotton according to the size of the top of the cabinet, remove the adhesive paper layer on the back of the dew insulation cotton, install permanent magnet iron sheets on the dew insulation cotton interlayer, and paste the dew insulation cotton directly on the top of the cabinet
Professional Electrical Enclosure Manufacturer
Brings Excellent Services
How Can We Help Your Business?
What’s your company main products?
The main business is to provide customers with custom enclousure services, we also sell some General Boxes.
How about the price of the product?
We are a manufacturer, we mainly provide customized services for our customers, and we believe that our prices have enough advantages.
What does the enclosure customization service contain?
Box Sizes,Box Colors,Door Types,Gland Plates,Specific Cutouts,Moutning Plates,Protective Covers,Standing Types,Windows,Thickness,Accessories.
Can we get the sample? Is it free?
Yes, we could offer the general box sample for free charge,but need you pay the express. The freight depends on weight, packing size and your country or province region, etc.
What’s about MOQ?
First order MOQ=1pcs.
How can I get product catalogs?
You can get the catalogs by contacting us.
How to order our product?
1.Please tell us the model and quantity and other request you need.
2.We make the PI for you.
3.After you confirm the PI, we arrange the order for you after receiving your payment.
4.After the goods finished, we send the goods out to you and tell you the tracking number.
5.We will track your goods until you receive the goods.
How about the after-sale service?
If you meet any problems after sales, pis contact us freely, we’ll help solving the problems within 24 hours.
What’s the payment term?
100% T/T (large order, accept 30% T/T prepay 70% balance before shipping), Western Union, Paypal.
Related Blog
Reliable Electrical Enclosure Supplier in Africa
What Makes a High-Quality Electrical Control Cabinet?
Understanding Enclosure Thermostats: Why They Matter in Electrical Cabinet Systems
