Main Specifications
Accuracy class£º1.5
Scale range
£º0¡«0.16£»0~0.25£»0¡«0.4£»0¡«0.6£»0¡«1£»0¡«1.6£»0~2.5£»0¡«4£»0¡«6£»0¡«10£»0¡«16£»0¡«25£»0¡«40£»0~60£»-0.1¡«0.06£»-0.1¡«0.15£»-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 220V or AC 380V;
Contact Power: 10VA
Work Location: Vertical installation
Use of environmental conditions: -10 ~ 50 ¡æ, relative humidity less than 80%, and the explosive mixture should belong to group ¢ò 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% / 10 ¡æ, the set point less than 0.6% / 10 ¡æ (temperature deviation from 20 ¡À 5 ¡æ).
Insulation Strength: 50Hz sine wave AC 2000V for one minute duration
Weight: 6kg
* Types and basic parameters of proof joints
Shell volume
V(L) |
£¾0.5 |
Type joints
|
Plane
|
Cylinder
(Movable part
) |
The minimum effective length of flameproof joints
Lmm |
15 |
Proof screw hole edge to the minimum effective length of the joints
L1 |
8 |
Flameproof joints or diameter of the largest poor gap
Wmm |
0.15 |
Flameproof joints in the surface roughness
Ra |
3.2 |
1.6 |
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
Part Name
|
Or the name of trademark
|
Part Name
|
Or the name of trademark
|
Drive housing cover
Outlet box
|
ZL102
(orZL-102£¬ZL-101) |
Thin washers |
L3 |
tr>
connection |
20 |
tr>
sleeve |
QAJ9-2 |
spring tube |
3J53 |
tr>
observation window |
plexiglass
|
|
|
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. |