The insulation (protection) box belongs to the fixed steel industrial instrument box, which is suitable for on-site insulation or protection of various instruments. Suitable for on-site installation of various instruments. (including transmitters, pressure, differential pressure, liquid level, temperature transmitters), etc. The insulation (protection) boxes produced by our company have been improved and designed based on the advantages of various domestic products. The heating element used in the insulation box is a self limiting electric heating plate, which has the characteristics of uniform heating inside the box, no overheating phenomenon on the surface, no starting current, no power degradation of the automatic temperature control heating belt resulting in no heating inside the box, fast installation, simple maintenance, and long service life. It can be widely used for instrument protection in power plants, petroleum, chemical, metallurgical, textile, defense industries and other systems. Product specifications, structure, and technical parameters: 1. Specification and model of instrument protection box
Structural characteristics of instrument insulation (protection) box:
1. The box is made of high-quality cold-rolled steel plates bent and welded, and can also be made of stainless steel plates according to user requirements. The top cover of the box is a one-way slope type, which prevents water from seeping into the box. The box door is sealed with high-quality sealing strips, which can prevent rain and dust. The enclosure is splash proof and sealed, and can meet the protection level of IP54-IP65 according to user requirements.
2. There are 25-30mm thick flame-retardant insulation layers on all six sides of the box, which have the advantages of low thermal conductivity, small capacity, flame retardancy, non toxicity, good waterproofness, and corrosion resistance. Use galvanized or aluminum sheet as a protective layer on the surface. The insulation structure of the box has the characteristics of simple construction, durability, and good insulation performance.
3. The gearbox is installed inside the casing and can be freely adjusted in height on a horizontal galvanized frame. The left, right, top, and bottom coordinates can be adjusted using the elongated holes on the angle steel of the box column, making installation convenient.
4. The pressure guiding pipe introduced into the box can be inserted through a square hole installed on the back of the box, and then sealed with a pipe plate. The holes on the pipe plate that are not used for knocking off can be sealed with sealing adhesive.
5. There is a lighting lamp on the top of the box, which is controlled by a travel switch. The door lights on and off when the door is closed, making maintenance very convenient.
There is an LED digital display on the door of the box, which displays the temperature inside the box, making it easy for the operator to check the insulation inside the box.
7. Cables can be introduced from the ground or side of the box, and the specifications of cable joints are determined by the design or user.
8. There are guide rails on the inside of the insulation box for installing electrical components, which are used to fix the cables connected to relays, switches, etc. in the box.
9. The inner and outer surfaces of the box are sprayed with plastic, and the color is determined by the user.
10. If the heating element inside the insulation box adopts explosion-proof flexible heating plates and is matched with explosion-proof junction boxes and other accessories to form an overall explosion-proof system, it can be applied to explosion-proof occasions such as Zone 1 and Zone 2 of the factory.

Technical specifications of insulation (protection) boxes for instruments
Rated voltage: 220V, YC+10%
Rated frequency:~50HZ
Working environment temperature -25~55 ℃
Relative humidity: 5-95%
Maximum operating current: 10Y
Insulation resistance:>20M Ω
Explosion proof grade: e Ⅱ T3
Protection level: IP54-65

Installation and Usage
1. The instrument insulation and protection box should be installed vertically, and the box feet should be connected or welded with foot bolts, or customized by the user according to the site conditions.
2. When installing the transmitter, first remove the pressure pipe from the back wall of the box and insert it into the box plate (or the side wall according to user requirements), then drill holes according to the number of pressure pipes, insert the sealing ring and pressure pipe, and reinstall the tube plate.
3. When the flexible silicone rubber heating plate is put into use, first turn on the power switch of the distribution box, and then supply power to each circuit one by one. The operator should measure the current values of each circuit at any time and make records.

Ordering Instructions
1. Design institutes or users can choose different specifications of instrument insulation (protection) boxes according to the number of instruments, and indicate the number of transmitters and terminal blocks. The color of the box should be indicated (if not specified, it should be selected by the manufacturer). If necessary, a color sample with dimensions of 100 × 50 × 1mm should be provided.
2. To ensure the effectiveness of the insulation (protection) box, please specify when ordering:
Model, quantity, place name, location, and meteorological data such as the lowest temperature, wind speed, and temperature in the environment. The temperature range inside the box is required to be maintained.
3. Our company can design and produce non-standard instrument insulation (protection) boxes according to users' special requirements.