Explosion-proof electrical contacts pressure gauge

タイトルまたは説明

Main Specifications
Accuracy class：1.5
Scale range ：0～0.*6；0~0.*5；0～0.4；0～0.6；0～1；0～1.6；0~2.5；0～4；0～6；0～*0；0～*6；0～*5；0～*0；0~*0；*0.1～0.*6；*0.1～0.*5；*0.1～0.3；*0.1～0.5；*0.1~0.9；*0.1～1.5；*0.1～2.4MPa
Control method: upper and lower contact switch
Postponed Maximum working voltage: DC **0V or AC **0V;
Contact Power: *0VA
Work Location: Vertical installation
Use of environmental conditions: **0 ~ *0 ℃, relative humidity less than *0%, and the explosive mixture should belong to group Ⅱ B T4 level below the work of vibration and pulse of the measured medium reliable instrument operation has no effect on contact.
Temperature effects: show the value of not more than 0.4% / *0 ℃, the set point less than 0.6% / *0 ℃ (temperature deviation from *0 ± 5 ℃).
Insulation Strength: *0Hz sine wave AC ***0V for one minute duration
Weight: 6kg
* Types and basic parameters of proof joints

Note: proof joints and gap width of the effective length of the sample can be found in the structure diagram of flameproof enclosures 。

· Flameproof enclosure and the pressure leading system and other parts and materials

Note: proof electrical contacts of the observation window of the material of its impact strength is not less than 4J。Once the damage to the observation window, are not allowed to use.

structure principle

explosion-proof electrical contacts by flameproof enclosures, measuring systems, electrical contact group, with regulator and outlet boxes and other components.

explosion-proof electrical contacts of the explosion proof enclosure with a good performance, explosion-proof electrical contacts in the normal course of their work the impact of the spark or arc, in addition to the shell can withstand explosive gas mixtures within the explosion generated in the event of an explosion caused by pressure, and can effectively prevent the resulting heat energy spread out smoothly, but only within the shell along the flameproof joints in the small gap at the slow spreads. At this time, spread to the moment of the external shell temperature has dropped to an explosive gas mixture temperature below the ignition, it will not cause booster.

Explosion-proof electrical contacts of the working principle is based on the detection device ( in the spring tube measuring system ) of the elastic deformation, driven by mechanical transmission to make electrical contact in the contact group to produce the corresponding action ( close or disconnect )in order to control pressure system can be connected in the circuit On or off, in order to achieve automatic control and alarm and on-site instruction purposes.