Product Name: WZP series flameproof platinum resistor




Product No.: 132222-986
Product model: 0
Updated on: June 14, 2009
Manufacturer: thermo couple -- Shanghai Feilong instrument & Electrical Co., Ltd
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Product details
WZP series flameproof platinum resistance (with imported platinum resistance element)
The industrial flame-proof platinum resistance is a kind of temperature sensor, which is widely used in the industrial automatic control system. Through the temperature sensor, the temperature parameters of the control object can be changed into electrical signals, which can be transmitted to the display, recording and regulating instruments to detect, regulate and control the system.
In the chemical plant, the production site is often accompanied by a variety of flammable, explosive and other chemical gases, steam, if the use of ordinary platinum resistance is very unsafe, it is very easy to cause environmental gas explosion. Therefore, explosion-proof thermal resistance must be used as temperature sensor in these occasions. The explosion-proof platinum resistance products produced by our company are suitable for places with explosive gas risk in the temperature group of dllbt4 and dllct4.
The thermal resistance produced by our company adopts imported components as temperature sensing components, and its technical performance meets the technical conditions and graduation table of zby301-85 industrial platinum electricity. At the same time, the products meet the general requirements of explosion-proof electrical equipment for explosive environment gb3836.1-83 and gb3836.2-83 standards. The national instrument explosion-proof safety supervision and inspection station shall specially examine and approve the drawings, technical documents and prototype of the products, and issue the explosion-proof certificate and the explosion-proof platinum thermal resistance certificate number.
Main technical indicators
Nominal pressure
Generally, it refers to the static external pressure that the protection pipe can bear without breaking under normal temperature, and the test pressure is generally 1.5 times of the nominal pressure. In fact, the allowable nominal pressure is not only related to the material, diameter and wall thickness of the protection pipe, but also related 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 insulation resistance at room temperature can be any value of DC 10-100v, the ambient temperature should be in the range of 15-35 ℃, and the relative humidity should not be more than 80%. Insulation resistance at room temperature shall not be less than 100mq.
Allowable current of thermal resistance
The maximum measured current through platinum resistance shall not exceed 5mA.
Explosion proof type and class group
Explosion proof group: dllbt4
Enclosure protection grade: IP65 (gb4208 standard).
Principle and structure
The structure and principle of explosion-proof thermal resistance and assembly thermal resistance are basically the same. The difference is that the junction box (shell) of explosion-proof products is designed with explosion-proof special structure, and the junction box is made of high-strength aluminum alloy die-casting, and has enough internal space, wall thickness and mechanical strength. The thermal stability of rubber seal ring meets the national explosion-proof standard. Therefore, when the junction box When the internal explosive gas mixture explodes, its internal pressure will not damage the junction box, and the resulting heat energy can not spread out for a detonation.
Due to the above special explosion-proof structure, the product completely conforms to the range of explosion-proof temperature groups of dllbt4 and dllct4. As long as the user strictly abides by the product use rules, the product can achieve reliable explosion-proof effect.