During use, explosion-proof electrical equipment is affected by working conditions and the environment. To ensure that the electrical equipment maintains the integrity of its explosion-proof performance throughout its service life, regular or irregular inspections and maintenance shall be carried out in accordance with regulations.。

Inspect And Maintenance的Purpose And AccidentMeaning

Affectfactor

Explosion-proof electrical equipmentinUseInCanRestrictedAchieveEnvironmental Conditions、VibrationInteraction、InvincibleQuiteInstallation And MaintenanceEtc.factorAffect，therebyRestrictedAchieveInvincibleSameExtentDegree的WearDamage And DamageHarmful，WithCausingreductionProduct的explosion-proofsafetyPerformance。

For Example :1、Mobile柄 2、joint surface

Explosion-proof ElectricalInspect And Maintenancerequirements

Generally Regulations

1、Explosion-proof electrical equipmentShouldByAftertrainingConsiderCorequalifiedpersonnelOperate、Use And MaintenanceMaintenance。

2. Explosion-proof electrical equipment shall be operated in accordance with the technical conditions of use specified by the manufacturer.。

3. The protection, interlocking, monitoring, and indicating devices on the equipment shall not be removed arbitrarily and shall be maintained in a complete, sensitive, and reliable condition.。

4. When inspecting equipment in explosive hazardous locations during maintenance, it is strictly forbidden to release protection, interlocking, and signal devices; after a fault-induced power outage, it is strictly forbidden to forcibly restore power before the cause has been identified; it is strictly forbidden to cut wires while energized or use tools that can produce impact sparks.。When cleaning the interior of equipment containing flammable and explosive substances, the power supply must be disconnected and a warning sign must be posted; before restoring power to the interior of equipment containing flammable and explosive substances, the concentration of explosive mixtures inside and in the environment must be detected, and power may only be restored after confirming safety.。

5. New equipment should preferably be disassembled and inspected before installation, and may only be put into operation after meeting the specified requirements.。

6. The operation and maintenance inspections of explosion-proof electrical equipment are divided into three types: routine operation and maintenance inspection, professional maintenance inspection, and safety technical inspection.。Enterprises shall determine their own inspection cycles, inspection items, and requirements based on the characteristics of the production environment, equipment condition, medium leakage and corrosion, mechanical wear, and other factors.。Professional maintenance shall generally be conducted once every six months, and safety technical inspections shall be conducted once every six months or once every year.。

InspectGeneral Requirements

1、articleComponentsrequirements

In order toAdvanced Inspect And Maintenance，ShouldpossessNextColumnarticleComponents And Technologydocuments:

（1）explosionHazardous LocationclassificationarticleComponents And documents；

（2）equipmentexplosion-proofcategory And Temperature Class；

（3）AbilitycanMakebeInspect And Maintenance的Explosion-proof electrical equipmentcompliantItsexplosion-proofTypeForm的Record（Analysis，equipmentList，equipmentConfigure，FacilityComponents，Technologydocuments And Manufacturer的User ManualDocument）。

2、personnelqualificationrequirements

ForElectricaldevice的Inspect And MaintenanceShouldByAftertrainingConsiderCorequalifiedPleaseWithexperience的personnelAdvanced 。These personnel shall have received professional training covering various types of protection, installation practices, relevant regulations and procedures, and the general principles of classification of hazardous areas.。These personnel shall also receive appropriate continuing education or regular training, and possess relevant experience and qualification certificates.。

Inspectrequirements

Ventilationthen

Explosion-proof electrical equipmentInspectUpClassInitialStartInspect、Regular Inspection、SamplingInspect And ContinuitySupervision。Initial inspection shall be carried out on the entire installation or equipment before it is put into service.。At any time, if the classification of the hazardous area has changed or the location of electrical equipment has been altered, an inspection shall be carried out to ensure that the type of protection, equipment category, and temperature class are compatible with the changed conditions.。

Inspecttype

1、InitialStartInspect:LocationsWithelectricalequipment、system And deviceinInvestIntooperationFrontAdvanced 的Inspect。

2. Periodic inspection — Routine inspection carried out on all electrical equipment, systems, and installations.。Corresponding visual inspection or close inspection may be carried out.。Mobile (portable, hand-held, and transportable) electrical equipment is particularly susceptible to damage or misuse; therefore, the interval for periodic inspection may be shortened as actually required.。

Mobile electrical equipment shall undergo a general inspection at least once every 12 months, and enclosures that are frequently opened (such as battery covers) shall be subject to close inspection.。Such equipment shall be visually inspected by the user before use to ensure that it has no obvious damage.。

3. Sampling inspection — Inspection carried out on a portion of electrical equipment, systems, and installations.。

4. Continuous supervision — Regular maintenance, inspection, maintenance, and repair of electrical equipment and its operating environment carried out by skilled technical personnel experienced in specialized installations, so as to maintain the explosion-proof performance of the installation in good condition.。

MaintenanceGeneral Requirements

1、replacementzeroComponents

2、SoftCable的Maintenance

3、shutdown

4、Fasteners And tools

equipmentInspect

Explosion-proof electrical equipmentInspectUpClassDailyoperationMaintenanceInspect、professionalMaintenanceInspect And safetyTechnologyInspectThreeVarious。Professional maintenance is generally conducted once every six months, and safety technical inspection is conducted once every six months or once a year.。

DailyoperationInspect

1）Explosion-proof electrical equipmentEnclosure And EnvironmentProtectionSupportcleaning，ClearRemoveWith碍equipmentsafetyoperation的ImpuritiesMineral And flammableMineralQuality。

2) The equipment shall have good ventilation and heat dissipation conditions during operation; check that the enclosure surface temperature does not exceed the maximum temperature and temperature rise specified in the product requirements.。

3) The equipment shall not be subjected to external force damage during operation, and there shall be no tilting or component friction phenomena.。The sound should be normal, and the vibration value should not exceed specified limits.。

4) For motors in operation, the bearing parts shall be inspected, kept clean and with the specified oil quantity, and the bearing surface temperature shall be checked and shall not exceed the specified value.。

5) Check that the fixing bolts and springs on all parts of the enclosure are complete and tightened, and shall not be loose.。

6) Check whether the enclosure of the equipment has cracks or mechanical deformation that impairs explosion-proof performance.。Cable entry devices should be reliably sealed.。Unused cable entry holes shall be sealed with steel plates with a thickness of no less than 2mm.。The transparent plates of observation windows should be intact and free of cracks.。

7) Check whether the gas inside pressurized-type electrical equipment contains explosive substances or other harmful substances; the gas volume and pressure shall comply with the requirements, the gas flow shall not contain sparks, the outlet gas temperature shall not exceed the specified value, and the differential pressure relay shall be complete and operate sensitively.。

8) Check the oil level of oil-immersed electrical equipment, which shall be maintained at the oil level mark; replenish oil promptly when insufficient, the oil temperature shall not exceed the specified value, and check whether the exhaust device is blocked and whether the oil tank has oil seepage or leakage.。

9) All protective, interlocking, detection, alarm, and earthing devices on the equipment shall be complete and intact.。

10) Check whether explosion-proof luminaires maintain their explosion-proof structure and the integrity of their protective covers as specified.。Check that the surface temperature of the lighting fixtures does not exceed the value specified in the product documentation.。

11) In explosive atmospheres, except for motors that are permitted to start frequently as specified in the product requirements, all other types of explosion-proof motors shall not be started frequently.。

12) Pressurized-type explosion-proof electrical equipment shall be ventilated or purged before starting; only when the total volume of ventilation or purging reaches more than 5 times the total internal volume of the enclosure and piping shall power be supplied for starting.。After pressurized-type explosion-proof electrical equipment is shut down, the air supply shall be stopped after a time delay.。

13) The earthing conductors of explosion-proof electrical equipment shall be firmly connected, with no loose earthing terminals, no obvious corrosion, no breakage, and no fracture of the outer steel tape of armored cables.。

14) When the following conditions occur during the operation of electrical equipment, the operator shall take emergency measures, shut down the equipment, and notify professional maintenance personnel for inspection and handling.。

(1) When the load current suddenly exceeds the specified value or a phase-loss operating condition is confirmed.。

(2) When the motor or switch suddenly develops high temperature or emits smoke.。

(3) When the motor or equipment produces friction due to loose components, generating noise or sparks.。

(4) When the mechanical load develops a serious fault or endangers electrical safety.。

15) Equipment operators shall promptly handle abnormal phenomena found during routine operational maintenance and routine inspection if they can be handled; if they cannot be handled, they shall notify electrical maintenance personnel for handling, and record the problems or accidents in the equipment operation log.。

professionalInspectMaintenance

1）replacementlightingLightFoam、Fuse And Intrinsic SafetyTypeequipment的power supplyElectricCellWhen，mustUsecompliantDesignRegulations的specificationModel，InvincibleHighlyWithFastVariableGreater。

2) Clean the internal and external dust of electrical equipment, and perform rust removal and anti-corrosion treatment; replace the moisture-absorbing agent in cable steel conduits or drain water according to environmental conditions.。

3) Check the integrity and insulation condition of the equipment and electrical circuits.。

4) Check the reliability of earthing conductors and the integrity of cables, junction boxes, etc.。

5) During power-off inspection, check whether the internal moving parts of the electrical apparatus have wear exceeding the specified limits and whether the terminal connections are firm and reliable.。

6) Check the explosion-proof structure parameters of various types of explosion-proof electrical equipment and the parameters of intrinsically safe circuits.。

7) Check whether control, measuring instruments, telecommunication equipment, and protective devices comply with explosion-proof safety requirements; whether they are complete, intact, sensitive, and reliable; and whether there are any other defects.。

8) Check the problems raised in the equipment operation or defect records, handle them promptly, and eliminate hidden dangers.。Those that cannot be handled shall be reported promptly to the higher level.。

safetyTechnologyInspect

1）InspectexplosionHazardous LocationEquipment OperationOperate、IntelligentLaboratoryanalysis、Electrical、InstrumentTable、VentilationNews、equipmentrepairEtc.WithPay AttentionpersonnelIsnoMatureWell-knownElectricalexplosion-proofsafetyTechnologybasicKnowledge。

2) Check whether the rules and regulations for the operation, operation, maintenance, and repair of explosion-proof electrical equipment and circuits are complete and whether they are implemented.。

3) Check the problems existing in the explosive atmosphere in accordance with technical requirements.。

4) Propose solutions to the identified problems and verify the implementation of these measures.。

InspectMaintenancePrecautions

1）DailyoperationMaintenanceInspectWhen，Strictly ProhibitPunchingOpenequipment的SealingBox、WiringBox、Incoming Linedevice、IsolationDistanceSealing And Observation WindowEtc.。

2) During professional maintenance inspections, the power supply must be disconnected, and a warning sign must be hung on the switch before opening the equipment cover for inspection.。

3) Do not directly rinse explosion-proof electrical equipment with pressurized water.。

4) non-explosion-proof mobile and portable electrical instruments are prohibited from use in explosive hazardous areas.。

5) Minimize the frequency of opening the flameproof enclosure of flameproof equipment.。

6) It is forbidden to replace bulbs while the power is on; power may only be restored after the flameproof enclosure is securely fastened.。

The above is an introduction to the inspection and maintenance of explosion-proof electrical equipment. For more related information, please visit Hualong Explosion-proof at www.hlfbdq.com/.