Explosion-proof Maintenance

Explosion-proof electrical equipment的OverhaulIsIndexIn order toMaintenanceExplosion-proof electrical equipment的Explosion-proof Performance、ElectricalperformanceWith And equipment And variousProtection Device的reliablePerformance，Withguaranteesafetyoperation And Actual 的Inspection And RepairPhilosophy。

The repair of explosion-proof electrical equipment is generally divided into three types: general repair, professional repair, and factory repair.。General repair is carried out at any time as actual conditions require, while professional repair is generally conducted once every six months or once a year.。

Generally requirements

1）Explosion-proof electrical equipment的OverhaulShouldByEnterpriseSystemStableprofessionalRepairPhilosophyUnitLoad责。

2) Personnel engaged in the repair and inspection of explosion-proof electrical equipment shall receive training on the repair knowledge of explosion-proof electrical equipment, and may only undertake repair and inspection work after passing the assessment.。

3) After major or medium repair of explosion-proof electrical equipment, the maintenance personnel shall fill in the maintenance record, and the equipment shall be inspected by the professional explosion-proof quality inspection personnel, and only after the certificate of conformity is issued can it be delivered for use.。

4) It is forbidden to carry out live maintenance on electrical equipment and lines in explosive hazardous areas; it is forbidden to schedule power supply interruption or restoration at an agreed time.。A warning sign reading "Men at work, do not close the switch" shall be hung at the point where the power is cut off.。

5) The repair of flameproof enclosures shall be carried out in accordance with the current national technical regulations.。The structure of the enclosure, the materials and dimensions of the main components shall not be modified or replaced.。

6) When hot work is required for the repair of explosion-proof electrical equipment and lines in explosive hazardous areas, the approval procedures for hot work must be completed.。

7) The repair of explosion-proof electrical equipment is divided into three types: minor repair, medium repair, and major repair.。

8) If the explosion-proof equipment is dismantled and moved to a safe area for repair during maintenance, the cable ends of the on-site equipment power supply shall be properly treated with explosion-proof measures, and it is strictly forbidden to energize them.。

9) During on-site repair, the cover shall not be opened until the rotating parts of the explosion-proof electrical equipment have completely stopped.。If the equipment inside the flameproof enclosure contains energy storage components (capacitors, oil and gas detection probes), according to the manufacturer's regulations, after power-off, wait for a certain period of time until the energy is fully discharged before opening the cover.。

10) During on-site repair, it is not allowed to use non-explosion-proof instruments, lighting fixtures, telephones, etc., unless the explosive gas mixture has been completely removed and corresponding safety measures have been taken.。non-sparking explosion-proof tools shall be used for all tools.。

11) The flameproof surfaces shall be properly protected and shall not be damaged. The flameproof surfaces shall be free of rust layers, and after cleaning, shall be coated with phosphating paste or no. 204 anti-rust oil.。

12) When replacing components and parts of explosion-proof electrical equipment, their dimensions, models, and materials must be identical to the original ones.。Fastening bolts must not be arbitrarily replaced or omitted.。

13) It is forbidden to change the internal circuits and wiring of intrinsically safe equipment.。If components are replaced, they must be of the same specifications as the original ones; battery replacement must be carried out in a safe area, and batteries of the same model and specifications must be used.。

14) It is strictly forbidden to dismantle explosion-proof lighting fixtures or replace explosion-proof lamps (bulbs) while energized, and it is strictly forbidden to replace explosion-proof lighting fixtures with ordinary lighting fixtures.。The reflector of the explosion-proof lighting fixture shall not be arbitrarily modified, and the power of the explosion-proof lamp (bulb) shall not be arbitrarily increased.。

15) The explosion-proof marking of the repaired explosion-proof equipment shall remain unchanged.。After the repair is completed, the inspection items, repair contents, test records, component replacements, defect handling, and other details shall be recorded in detail in the equipment technical archives.。

16) During the inspection and repair of explosion-proof electrical equipment, if it is found that the equipment does not meet the technical requirements, but there is no qualified spare part available at the moment, in order not to affect normal operations, the oil depot may propose safety preventive measures and report them to the superior competent department for filing. For equipment with a relatively high degree of danger, approval from the superior competent department must be obtained, but the equipment problems must still be resolved within a specified time limit.。

OverhaulmainlyContent

1）EasyDamage、EasyBadVariousComponents的replacement。

2) Repair of damaged components to restore them to their original condition.。

3) Comprehensive repair of damaged electrical equipment to restore it to its original condition.。 4) Check whether the setting values of various protective devices (such as overcurrent, overload, over-temperature, overpressure, grounding, pressure, etc.) have changed.。

5) Preventive performance testing of equipment.。

Generally PerformanceOverhaul

1）Daily的on-siteMaintenance。

2) Remove dust, dirt, and other debris from inside and outside the equipment enclosure.。

3) Replace or repair vulnerable components and fasteners.。

4) Test the insulation resistance values of motors, electrical appliances, and lines.。

5) Replenish and replace insulating oil and lubricating grease (oil) at equipment lubrication points.。

6) Adjust the mechanical operating mechanisms, interlocking mechanisms, and setting values of protective devices of the equipment.。

7) Check whether the grounding wire is intact and measure the grounding resistance value.。

8) Check the sealing condition of the equipment's cable entry holes, and replace sealing rings that are damaged, deformed, or aged and deteriorated.。

professionalPerformanceOverhaul

1）complete Generally PerformanceOverhaulContent。

2) Check the wear condition of motor bearings and replace unqualified bearings.。

3) Inspect flameproof components and repair unqualified flameproof joints.。

4) Measure and adjust the flameproof gap values.。

5) Repair coil insulation and weld terminals.。

6) Recoat the inner wall of the enclosure cavity with arc-resistant paint and apply anti-corrosion paint to the exterior.。

7) Replace cables and steel conduit wiring that have become unqualified in local areas.。

8) Replace small explosion-proof equipment such as switches and buttons that have malfunctioned or are scrapped.。

SendFactory Or 聘PleaseTechnical PersonnelAchieveMarketOverhaul

Explosion-proof electrical equipmentOutputOn-siteImportantGreaterfault，on-siteconditionnonAlgorithmRepairAgain Or incompleteLessqualified的OverhaulpersonnelWhen，ShouldSendequipmentProductionIndustryFactory Or WithAuthorityRepairPhilosophyExplosion-proof Electrical Appliance的UnitAdvanced RepairPhilosophy。

For larger repair items carried out by oneself, such as rewinding motor or transformer coils, replacing flameproof enclosures, and main components, etc., they must be inspected by a professional explosion-proof quality inspection organization, and only after the certificate of conformity is issued can they be put into use.。After the coil of a flameproof motor is burned out and rewound and repaired by oneself, it shall no longer be used as an explosion-proof motor with the explosion-proof level indicated on the nameplate.。

Flameproof TypeequipmentOverhaulStandard

Flameproof TypeElectricalequipmentItsElectricalperformanceShouldcompliantSameVariousOrdinaryElectricAppliance的qualityStandard，Itsexplosion-proofqualityrequirementsSuch asFlameproofClearance、PermitMaximum Surface Temperature、ScrewThreadWithEnergy-saving扣Index、AdvancedOutgoing LineHoleSealingEtc.，mustcompliant《Explosive AtmosphereUsersExplosion-proof electrical equipmentGeneral Requirements》(GB 3836．1) And 《Explosive AtmosphereUsersExplosion-proof electrical equipmentFlameproof TypeElectricalequipment"d"》(GB 3836．2)的Regulations。

ReportWastecondition

1）Explosion-proof electrical equipmentBecauseRestrictedOverseasStrengthDamage、Atmospheric Corrosion、SelfhoweverAging、machineryWearDamage、accidentDamageWhen，Explosion-proof PerformanceNextLower，althoughManagementOverhaul And replacementzeroComponentsStillRecoverInvincibleAchieveRawWith的Explosion-proof Performance，Hazardous And safetyoperation的ShouldReportWaste。

2) If explosion-proof equipment can meet quality standards after major repair, but the repair time is long and the repair cost is greater than or close to more than 50% of the cost of purchasing the same type of equipment, making it economically unreasonable, it shall be scrapped and replaced.。

3) If the insulation strength of cables and steel conduit wiring is lower than the standard and is difficult to repair, which may lead to line grounding, short circuits, and other conditions endangering safe operation, the affected parts or the entire system shall be scrapped and replaced.。

4) If the explosion-proof equipment manufacturer and the national explosion-proof inspection authority have announced that the equipment is obsolete and prohibited from use, it shall be scrapped and replaced.。

LowerLevelUse

Explosion-proof electrical equipment的ReportWasteMeaningMerelyIndexShouldequipmentRawExplosion-proof Rating的lossEnergy-saving， And InvincibleIndexequipment的MostFinalReportWasteprocessing。

If after repair and replacement of components, the equipment cannot achieve the original explosion-proof performance level but can still meet the explosion-proof performance of a lower level, it is permitted to be downgraded for use.。

If after repair the equipment still does not possess explosion-proof performance of any level, it may be used as ordinary electrical equipment.。

If it fails to meet the quality standards of ordinary electrical equipment, it may be disposed of as final scrap.。

审Batch And processing

DemandReportWaste的Explosion-proof electrical equipment，ShouldLeadingByUser OrganizationsCertificationTrulyUnitTextile鉴Stable，ConfirmcompliantReportWasteconditionPioneer，ProvideOutputReportWasteApply。For scrapping of small equipment or partial circuits, approval shall be granted by the leadership of the oil depot or gas station; for scrapping of large equipment or circuits over a wide area, approval must be obtained from the superior competent department of the oil depot or gas station before scrapping is implemented.。

Explosion-proof electrical equipment approved for scrapping or downgraded use shall be immediately removed from the installation site, the original explosion-proof level marking shall be removed from the equipment, and the appraisal records and documents approving the downgrade or scrapping shall be filed in the equipment archives and transferred with the equipment to prevent future misuse.。

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