Positive-pressure type explosion-proof power distribution cabinet

　　Positive-pressure type explosion-proof power distribution cabinetIsOneVariousForElectricalPower Supplypower distribution的Explosion-proof positive pressure cabinet，suitable forPetrochemical、OffshoreSupremedrilling platform、Metallurgy、pharmaceutical、LightIndustry、Textile、food、biologicalEngineering、AerospaceFutureAerospaceAerospaceEngineeringWith And LeaderMonitorfacilityEtc.IndustryFactory，haveⅡA、ⅡB、ⅡCLevel，Temperature ClassForT1～T4的Explosive Gas Or EvaporateStationEnvironmentIn;AltitudeInvincibleexceed2000Rice;25℃When，Relative Humidity95%following;Working Environmenttemperature-20℃～+40℃PositionArea。Various ordinary detection instruments, analytical instruments, display instruments, microcomputer touch screens, and ordinary electrical components can be installed according to user requirements, with essentially no restrictions on the user's internal electrical components.。

　　Positive-pressure type explosion-proof power distribution cabinetModel

       Positive-pressure type explosion-proof power distribution cabinetActualMineralDiagram

　　Positive-pressure type explosion-proof power distribution cabinetfeature

　　Positive PressureExplosion-proof Power Distribution CabinetBycabinet bodySelfControlsystem、clothStationsystem、Alarm System、Userpower distributionsystemcomposition;cabinet bodyByPositive PressureCavity And ViceCavitycomposition，Positive PressureCavityDomesticInstallationUserpower distributionsystemcomponent And PartSelfControlsystem的explosion-proofcomponent;ViceCavityDomesticInstallationSelfControlsystem、Alarm System And User的AdvancedOutputCable。

This pressurized explosion-proof cabinet is made of Q235 steel plate or stainless steel welded construction, with special sealing treatment applied to all joint surfaces.。

The air intake method of this pressurized explosion-proof cabinet is ventilation type, i.e., uninterrupted continuous air supply, and the working heat of components in the pressurized chamber can be carried away with the air path, providing excellent heat dissipation.。

This pressurized explosion-proof cabinet is designed, manufactured, and inspected in accordance with GB3836.1-2010, GB3836.5-2004, and related standards.。

　　Positive-pressure type explosion-proof power distribution cabinetexplosion-proofPrinciple

　　Positive PressureExplosion-proof Power Distribution Cabinetinautomaticcontrolsystem的controlNext，IntroduceProtectionGas，Positive PressureCavityDomesticpressureHigher thanPositive PressureCavityOverseas的pressure，DescribeCostMicroPositive Pressure safetySmallEnvironment，therebyHinderPrevent了flammablePerformancedangerousGasEntryPositive PressureCavityDomestic，guaranteeDomesticInstallationOrdinaryInstrumentTable And ElectricAppliancecomponent safetyoperation。

The automatic control system mainly completes a series of functions such as automatic purging, air replenishment, overpressure alarm (or automatic pressure relief), underpressure alarm, low-pressure interlock, and purge interlock.。

This power distribution cabinet has a low-pressure interlock function. When the pressure drops below the specified value (50Pa), it automatically cuts off the user's power distribution supply entering the pressurized chamber.。

　　Positive-pressure type explosion-proof power distribution cabinetInstallation Method

　　cabinet body的Installationposition:Indoor Or OutdoorWithShelterTop，non Obviously vibrationStandardFlat的InvincibleAspect。

The installation method of the pressurized explosion-proof power distribution cabinet is floor-standing (small cabinets can also be wall-mounted), with dedicated mounting holes provided at the bottom of the cabinet body; for specific parameters, refer to the technical appendix or the actual product.。

The wiring method is cable trench wiring (steel pipe wiring or cable wiring can also be used according to user requirements); the user's cable trench structure can refer to relevant national and industry standards and be designed and constructed in combination with the structural requirements of this cabinet.。

During transportation and installation, severe tilting is strictly prohibited, and methods such as prying or hammering must not be used for moving; otherwise, the sealing performance of the product may be affected, leading to inability to operate normally.。

　　Explosion-proof Power Distribution Cabinetsetup了AdvancedStationReputation And DrainStationReputation，UserRequiredAccording"StationLinePipelineArrangeDiagram"ArrangeAdvancedStationPipeline，DrainStationReputationAfteranti-FireValveAfter-salesinon-siteDrainRelease Or TriggerCustomer FirstSafe ZoneDrainRelease，Useron-siteRequiredprovideAdvancedStationAir Source，Air Sourcepressure Generally controlin0.4-0.8MPa，AdvancedStationAir SourceForNetIntelligentAerospaceStation(Such as:InstrumentTableRisk) Or NitrogenStation，(note:inSealingClosed的Operation RoomInside，CriticalCautionUseNitrogenStationAsProtectionGas，ifmustUseNitrogenStationOperatingProtectionGas，Pleasenoteon-siteventilation，WithensurePersonal Safety)。The inlet gas source must not be an explosive gas mixture.!!

Since the power distribution system components inside the cabinet are installed by the user, the user must perform installation and commissioning in a safe area.。

The electrical components on the panel must not be removed or dismantled, so as not to affect the airtight performance of the cabinet body.。

A low-pressure interlock contactor is installed in the pressurized chamber. The user should connect the main power distribution system power supply through the low-pressure interlock contactor so that when the pressure in the pressurized chamber is too low, the main power distribution supply is cut off through the contactor.。

When wiring, the user should pay attention to the sealing of each incoming and outgoing cable and use explosion-proof putty for appropriate sealing treatment according to the tightness of each cable.。

After the user completes wiring and commissioning, when closing each door, the sealing performance must be ensured.。

The cabinet body must be grounded by connecting the grounding wire to the dedicated grounding screw as required.。

　　Positive-pressure type explosion-proof power distribution cabinetCommissioning

　　Positive-pressure type explosion-proof power distribution cabinetOutputFactoryWhen，Positive PressureSelfControlPartalreadyAfterCommissioning，butUserinWithStructureWhen in Use，StillRequiredaccording toon-sitesituationImportantInnovationCommissioningAfter-salesMoreUse。

The auto-control section is applicable to AC220V, 50Hz power distribution systems.。

　　Positive-pressure type explosion-proof power distribution cabinetCommissioningClassTwoPart

　　1、Positive PressureSelfControlsystemCommissioning

　　InspectVariousPartIsnoIntactnonDamage，WithnonAffectExplosion-proof PerformanceEtc.，WiringIsnoTrulyEnsure(Weldingcontrolpower supply:AC220V)，manualValveIsnoPunchingOpen。Commissioning can only proceed after everything is confirmed normal.。

The commissioning method is closed-door commissioning: after configuring the air source, connect the power supply.。Fully open the inlet valve, press the "Start" button, the inlet solenoid valve opens, the countdown begins (generally 30 minutes), and the purge state is entered.。When the countdown ends, the purge is complete. The sensor detects the pressure value inside the positive-pressure chamber and displays it in the system window. The inlet solenoid valve closes, and gas is supplied to the cabinet through the bypass throttle valve of the solenoid valve, keeping the pressure gauge value stably between 200-300Pa (if not within this range, the adjusting nut below the throttle valve can be fine-tuned). The entire cabinet then enters automatic operation mode, and power is supplied to the "contactor" in the positive-pressure chamber. The main circuit can then be energized for normal operation, marking the completion of commissioning.

During use, if the pressure drops and falls below 100Pa, the explosion-proof alarm lamp will sound an alarm, entering the underpressure alarm state. If the inlet fault is not cleared and the cabinet pressure drops below 50Pa, the auto-control system will cut off the main power supply to the pressurized chamber; the system will remain in the underpressure alarm state (which can be cleared by pressing the "Mute" button); this is the low-pressure protection and electrical interlock process.。

When the pressure in the positive pressure chamber exceeds 400 Pa, the pressure limiting valve opens. After a period of time, the internal air pressure in the positive pressure chamber gradually decreases, bringing the pressure inside the cabinet within the normal pressure range, and the valve closes. This process is high-pressure limiting protection.DuringExtent

　　CommissioningPrecautions:

　　Positive-pressure type explosion-proof power distribution cabinetOutputFactoryWhen，VariousparameteralreadyEquipmentStableBrilliant，Strictly ProhibitUserExpertSelfGreaterModificationparameter。During commissioning, the user should ensure that the instruments, auto-control lines, and sampling pipelines are unobstructed.。

　　2、power distributionsystemCommissioning

　　Such asUserpower distributionsystemPartinCommissioningWhenInvincibleIdeal And pressurecontrolPartPay AttentionLinked，UpdirectlyAccording"Commissioning"AccordingKey，LinkedLockContactorCandirectlySuctionOverallEnergize，WithPower SupplyUserpower distributionPartCommissioningprovidepower supply，CommissioningPerfectCompleteAfter-salesUpMoreSecondaryAccordingCommissioningAccordingKeyRecovernormalStartDuringExtent，FoundationProductManagementTransportation、InstallationEtc.EnvironmentalEnergy-savingAfter-sales，muststrictaccording toLowPressurecomplete setequipment的Inspection、CommissioningStandardAdvanced Inspect，according toFoundationProductWithBoxTechnologyAttachment(TotalInstallationdrawingsEtc.)With And User的DesigndrawingsOne By OneOneForTo，Advanced Inspect And Operate。

　　Positive-pressure type explosion-proof power distribution cabinetUsage Method

　　TrulyEnsure的OperateIsdirectlyPay AttentionSystemAchieveFoundationProductAbilitynonormalInvestIntooperation， Therefore UsermuststrictAccordingOperateStepsOperate。

After this product has been installed, inspected, and commissioned normally, all doors are closed and sealing is ensured. All electrical components inside the pressurized cabinet are in a standby state, and the upstream switch is not energized. At this time, the entire product is in a standby state, i.e., it has entered pre-operation preparation.。

　　OperateSteps:

　　no.OneStep:Air SourceFacilityBrilliantAfter-sales， Completely PunchingOpen"AdvancedStationmanualValve"meanwhileAccordingNext"Start"Key，AdvancedStationElectromagneticValvePunchingOpen，EntryChangeStationstatestate(ThroughLimitedPressureValveDrainStation)。

note: This step is the purge operation. This equipment must undergo "purge operation" before normal operation, and purging is required before every operation. The purpose is to expel any flammable or explosive mixed gas that may exist in the pressurized chamber and replace it with clean protective gas, preventing electrical sparks from igniting flammable or explosive gases and causing an explosion during operation.。

Step 2: After 30 minutes of purging, the system enters the automatic monitoring state. At this time, the inlet solenoid valve closes, and makeup air is supplied to the cabinet through the bypass throttle valve of the solenoid valve, keeping the pressure gauge continuously displayed between 200-300Pa.。normal operation is then entered, and the system can be energized for operation.。

Step 3: During operation, observe whether there are any abnormal changes. If so, immediately cut off the power and identify the fault.。

Step 4: When it is necessary to exit system operation, first turn off all running loads, then disconnect the power supply of the user's power distribution system.。

Step 5: Disconnect the power supply of the auto-control system.。

Step 6: Close the inlet manual valve.。

Step 7: To prevent residual pressure in the cabinet, the cabinet door can be opened after 5 minutes for electrical inspection.。

Operators must strictly follow the above sequence of steps and are strictly prohibited from violating the operating sequence or simplifying the operating steps.。If any of the first two steps fails to meet the requirements, it is strictly prohibited to proceed to the next step. The fault must be cleared first, and then the operation must be restarted from the first step.。

On-site operators must frequently check whether the operation is normal and must take care to protect all operating components and display components on the panel. Operating components must not be damaged due to operational errors, which could cause leakage of the entire unit.。

　　Positive-pressure type explosion-proof power distribution cabinetMaintenance

　　note Frequently InspectSealing Ring的Agingsituation，DevelopOn-siteAgingWhenShouldRemain Namely replacement。

　　Explosion-proof distribution box的FlameproofStructureOverallAspectsRequiredRust-proofprocessing，EverySecondaryOverhaul Or PunchingOpenBox Cover，RequiredImportantCoat204-1Rust-proofOil。

Each time panel components are replaced, or the rear cover is opened and closed again, its sealing performance should be checked.。

　　Positive-pressure type explosion-proof power distribution cabinetPrecautions

　　 Due To Positive-pressure type explosion-proof power distribution cabinet May InstallationWithUnitChipMachine、PLC、Touch ScreenEtc.Componentsdevice， Therefore ，Please insafetyAreaDomesticInstallationRelatedShouldExtentProcedure， Strictly ProhibitinExplosion Hazardous AreaDomesticPunchingOpenAfter-salesCoverLive Working!!