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Flameproof platinum resistor





Detailed introduction:

Detailed introduction:

Flameproof platinum resistor (using imported platinum resistance components)

  WZP series flameproof platinum resistor (using imported platinum resistance components)

Note: “t” is the absolute value of the temperature measured by the temperature sensing element, and the double platinum resistance is only supplied to the class B.

Thermal resistance allows current to pass

The measured current through the platinum resistor does not exceed 5 mA at the maximum.

The structure and principle of the explosion-proof thermal resistance and the fabricated thermal resistance are basically the same, the difference is that the junction box of the explosion-proof product (the outer casing)

) The design uses an explosion-proof special structure, and the junction box is die-casted with high-strength aluminum alloy, and has sufficient internal space and wall.


  The industrial flameproof platinum resistor is a temperature sensor. It is widely used in industrial automatic control systems. Through the temperature sensor, the temperature parameter of the control object can be turned into an electrical signal, which is transmitted to the display, recording and adjustment instruments to detect, adjust and control the system.

  In chemical plants and production sites, there are often various chemical gases and vapors that are flammable and explosive. If ordinary platinum resistors are used, they are very unsafe and can easily cause environmental gas explosion. Therefore, in these occasions, the explosion-proof thermocouple must be used as the temperature sensor. The flameproof platinum resistance products produced by our factory are suitable for use in the place where the explosive gas hazard exists in the temperature range of d II BT4~d II CT6.
   The flameproof thermocouple produced by our factory adopts imported components as temperature sensing components, and its technical performance conforms to ZBY301-85 industrial platinum electrical technical conditions and indexing table. At the same time, the product meets the general requirements of explosion-proof electrical equipment for explosive environment GB3836.1-83, GB3836.2-83 standard.
    ◆ Main technical indicators
    Range Specification

Model

Graduation

Measuring range℃

Accuracy Level

Allowable deviation△ t ℃

WZP 
WZP 2 
WZPK 
WZPK 2 
 
PT100-200~500A level±(0.15+0.002|t|)
B level±(0.30+0.005|t|)
   
  Explosion-proof type and class

Explosion-proof group: d II BT4 or d II CT4 ; d II BT6 or d II CT6

Enclosure protection rating: IP54

    Principle structure
  

Thickness and mechanical strength, the thermal stability of rubber seals meets national explosion-proof standards. So, when the explosive mixture inside the junction box

When the body explodes, its internal pressure will not damage the junction box, and the resulting heat energy will not spread outward--explosion.

Due to the above special explosion-proof structure, the product is fully compatible with the use of d II BT4 to d II CT6 explosion-proof temperature.

Within the range of the group, as long as the user strictly abides by the product use rules, the product can achieve a reliable explosion-proof effect.


   Description of the category, level and temperature group of electrical equipment:

Electrical equipment is divided into two categories: Class I - electrical equipment for underground coal mines;

Class II - electrical equipment for the factory

                  
   Explosion-proof grade

The explosion-proof grade of the explosion-proof thermal resistance is suitable for the maximum safety clearance of the explosive gas mixture, which is divided into three grades A, B and C.

     Temperature group

The temperature group of the explosion-proof tropical internal resistance is divided into six groups of T1~T6 according to the highest surface temperature of the exposed part.

    Types and Specifications of Flameproof Thermal Resistance
categoryModelGraduationtemperature range℃Protective tube materialThermal response time t0.5sNominal pressure MpaStructural characteristicsSpecificationsExplosion-proof grade
Total length L ( mm )Deep insertion l ( mm )
Pt Thermal ResistanceWZP-24SAPT100-200~5001Cr18Ni9Ti Stainless steel
or0Cr18Ni
12M02Ti
≤ 9010 M27*2 Fixed Thread Installation of Flameproof Connection Box250 350 400 450 550 650 900 1150100 200 250 300 400 500 750 1000d IIBT4 
d II BT6 or
d II CT4
d II CT6

WZP2-24SA

WZP-44SA

6.4

WZP2-44SA

WZP-64S 
WZP2 
 

1Cr18Ni9Ti30Conical protective tube M33*2250 350 450100 200 300
   Types and Specifications of Flameproof Armoured Thermal Resistance
categoryModelGraduationtemperature
Range℃
Protection tube
diameterD
(mm)
Thermal response time t0.5sNominal pressure Mpastructure
Features
Specificationsexplosion-proof
Grade
Total lengthL
(mm)
Deep insertionl 
(mm)
Pt Thermal ResistanceWZPK-24 
WZPK2-24 
PT100-200-
500
φ 6 
or 
φ 5 
 
≤ 12 
≤ 8
10 
Fixed Thread Installation of Flameproof Connection Box M27*2 
300 
350 
450 
550 
650 
900 
1150 
150 
200 
300 
400 
500 
750 
1000 
d IIBT4 
d IIBT6 
or 
d IICT4 
d IICT6 
WZPK-44
WZPK2-44

6.4

Installation of Flameproof Connection Box Fixed Flange





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