Product Name: WZP Series Flameproof Platinum Resistor
Number of products: 132222-986
Product model: 0
Manufacturer: Thermocouple--Shanghai Feilong Instrument Electric Co., Ltd.
WZP series flameproof platinum resistance (using imported platinum resistance element)
Industrial explosion-proof platinum resistance is a temperature sensor, which is widely used in industrial automatic control systems. Through the temperature sensor, the temperature parameter of the control object can be changed into an electrical signal, and transmitted to the display, recording, and adjustment instruments to detect the system , Regulation and control.
In chemical plants, production sites are often accompanied by a variety of flammable, explosive and other chemical gases and steam. If ordinary platinum resistors are used, it is very unsafe and can easily cause environmental gas explosions. Therefore, flameproof thermal resistance must be used as a temperature sensor in these occasions. The flameproof platinum resistance products produced by our company are suitable for use in places where there is a danger of explosive gas in the dllBT4 and dllCT4 temperature groups.
The flameproof thermal resistance produced by our company uses imported components as temperature sensing components, and its technical performance is in accordance with ZBY301-85 industrial platinum electrical technical conditions and indexing tables. At the same time, the product meets the general requirements of explosion-proof electrical equipment for explosive environments GB38836-83 and GB38836-2-83 standards. The national-level instrumentation and explosion-proof safety supervision and inspection station shall specially review and approve the product drawings, technical documents, and prototypes, and issue Give explosion proof certificate, flameproof platinum thermal resistance certificate number.
Nominal pressure of main technical indicators
Generally refers to the static external pressure that the protective tube can withstand without breaking at normal temperature. The test pressure is generally 1.5 times the nominal pressure. In fact, the allowable nominal pressure is not only related to the protection tube material, diameter, and wall thickness, but also to its structural form, installation method, insertion depth, and the flow rate and type of the measured medium.
Thermal resistance Insulation resistance
The test voltage of room temperature insulation resistance can be any value from 10 to 100V DC, the ambient temperature should be in the range of 15 to 35 ° C, and the relative humidity should not be greater than 80%. The insulation resistance value at room temperature should not be less than 100MQ.
Thermal resistance allows current to pass
The measured current through the platinum resistance does not exceed 5 mA at most.
Explosion-proof type and class
Explosion-proof group: dllBT4
Enclosure protection level: IP65 (GB4208 standard).
Principle and structure
The structure of explosion-proof thermal resistance and assembled thermal resistance are basically the same. The difference is that the junction box (housing) of the explosion-proof product is designed with a special explosion-proof structure. The junction box is die-cast from high-strength aluminum alloy. , And has sufficient internal space, wall thickness and mechanical strength, the thermal stability of the rubber seal ring meets national explosion-proof standards, so when the explosive mixed gas inside the junction box explodes, its internal pressure will not damage the junction box, The resulting thermal energy cannot spread outward and burst.
Because the product adopts the above-mentioned special explosion-proof structure, the product is fully in line with the use of dllBT4 and dllCT4 explosion-proof temperature groups. As long as the user strictly adheres to the product use rules, the product can achieve a reliable explosion-proof effect.