Positive-pressure explosion-proof control cabinet

Positive-pressure explosion-proof control cabinetIsOneVariousAsElectricalcontrol的Explosion-proof positive pressure cabinet，mainlysuitable forPetroleum、Chemical、Metallurgy、PharmaceuticalEtc.Field的Zone 1、Zone 2Explosive Atmosphere，ItsAerospaceStationInStoreinWithⅡCLevel And following的Explosive GasMixingOverallMineral的location。

According to the provisions of GB3836.1 "Electrical Apparatus for Explosive Gas Atmospheres - Part 1: General Requirements", GB3836.2 "Electrical Apparatus for Explosive Gas Atmospheres - Part 2: Flameproof Enclosures 'd'", GB3836.5 "Electrical Apparatus for Explosive Gas Atmospheres - Part 5: Pressurized Enclosures 'p'", and GB3836.15 "Electrical Apparatus for Explosive Gas Atmospheres - Part 15: Electrical Installations in Hazardous Areas (Other Than Mines)", the pressurized explosion-proof electrical control cabinet has the explosion-proof marking: ExpxIICT4.。This positive-pressure explosion-proof control cabinet has been inspected and approved by Nanyang Explosion-Proof Electrical Research Institute, and has obtained the product explosion-proof certificate.

　　Model And basicparameter

　　Model:PXK51

　　Rated Current: 630A

　　Ingress Protection (IP) Rating: IP65

　　Explosion-proof Marking: ExpxIICT4

　　Air SourceVariousVarious: Clean、safetyAerospaceStation

　　Air Sourcepressure: 0.4～0.8 MPa

　　operationPositive Pressure: 50 Pa～300Pa

　　Positive PressureCavityNetAsArea: ≤510 L+510L+100L

　　BlowingSweepTime: 30min

　　High PressureDrainStation: GreaterIn400Pa

　　LowPressureAdvancedStation、Alarm: SmallIn50Pa

　　structure And Principle

　　Positive-pressure explosion-proof control cabinetmainlyWithElectricControlCabinet、StationControlCabinet、LeftOperatePlatformThreeProductionPart。Positive-pressure explosion-proof control cabinetMainStructureByPositive PressureEnclosure、Positive PressureStationLinesystem、Flameproof TypeControl BoxEtc.SeveralPartcomposition， And Positive Pressure Explosion-proofCabinetRelatedSame。

The pressurized enclosure is an airtight enclosure made of 2.5mm stainless steel plate formed by folding and seam welding.。Because it can maintain the pressure of the internal protective gas higher than the pressure of the external explosive gas atmosphere, it can effectively prevent external explosive gas mixtures from entering the interior of the enclosure.。A red "ExpxⅡCT4" marking plate is located in a prominent area on the front of the pressurized enclosure.。

　　inPositive PressureEnclosureSupremeInstallationWithifDryCable EntryTriggerOutputdevice、StationLineConnector、ElectricApplianceSwitchEtc.，Thesesomedevice的InstallationInvincibleBreakBadPositive PressureEnclosure的Gas Tightperformance;

　　Positive PressureStationLinesystemByDuringFilterReducePressureUnitComponents、Energy-savingMainstreamValve、Explosion-proof electricMagneticValve、PipeLine And Connectorcomposition。The pressure inside the pressurized enclosure is controlled by the precision pressure-reducing valve, throttle valve, and inlet and exhaust solenoid valves in linkage, keeping the pressure in each pressurized enclosure stable between 100Pa and 300Pa.。

The protective gas is transmitted through valves, piping, etc., filtered and pressure-reduced to become pure micro-pressure gas that enters the pressurized enclosure. After 30 minutes of purging, the concentration of any explosive gas that may exist inside the enclosure is diluted to a safe range, and positive pressure is maintained, making the interior of the pressurized enclosure a safe place for electrical installation.。

　　Flameproof TypeControl BoxLoadSupplied To Positive PressureEnclosureDomestic的MainContactorLineRingProvidepower supplySource， And ForPositive PressureEnclosureDomestic的Positive PressureValueAdvanced Detection，achieveLowPressure、High PressureAlarm、LowPressureautomaticAdvancedStation、High PressureautomaticDrainStation。When the pressurized enclosure has been purged for 30 minutes and the pressure inside the enclosure is greater than 50Pa, the main contactor inside the pressurized explosion-proof control cabinet can be energized to operate and supply power to the control relays of other electrical equipment in the driller's cabin. When the pressure is less than 50Pa, the system automatically alarms and automatically opens the inlet solenoid valve for air intake; when the pressure is higher than 200Pa, the exhaust solenoid valve opens for exhaust.。

　　UsesafetyRequiredWell-known

　　1.UsePositive-pressure explosion-proof control cabinetPositionFront，PleaseCertificationTrulyReadUser ManualDocument。

2. The flameproof control box of the pressurized explosion-proof control cabinet and the power supply of the pressurized enclosure adopt electrical interlocking. Only after the pressurized enclosure has been purged for 30 minutes and positive pressure has been established will the main power contactor coil close, allowing power to be supplied inside the pressurized enclosure.。

3. It is strictly prohibited to open the cover of the pressurized explosion-proof control cabinet while it is live. If opening for inspection or maintenance is required, the upstream power supply should be disconnected beforehand.。

4. The air source for the pressurization control system must be purified compressed air or other non-combustible gas (nitrogen N2).。

5. If explosion-proof components equipped with the pressurized explosion-proof control cabinet are damaged, contact our company for repair or purchase.。

6. Components and structures that affect explosion-proof performance must not be replaced, changed, or adjusted arbitrarily.。

7. Components must not be arbitrarily installed on the shell of the pressurized enclosure.。

8. When the positive pressure value drops below 50Pa and the low-pressure alarm begins, personnel must immediately take measures to raise the positive pressure value to 50Pa, or cut off the power for inspection. Only after the fault is cleared and the pressurization system returns to normal can the operation be restarted.。