Gas stations are hazardous areas where flammable gases exist, and even a slight oversight in the electrical part of the oil and gas recovery device may pose a safety hazard. The device adopts a built-in explosion-proof distribution box and explosion-proof junction box design, equipped with explosion-proof junction box and flame retardant cap. It already has corresponding protective capabilities, but the protective capabilities need to be maintained through daily inspections. This article compiles an executable checklist from three aspects: explosion-proof junction boxes, grounding systems, and power distribution links.
Explosion proof junction boxes are dangerous gathering points. During inspection, it is necessary to confirm that the box cover is securely fastened and well sealed, the explosion-proof surface is not damaged or corroded, and the sealing gasket is intact. It is strictly prohibited to open the explosion-proof junction box cover with electricity in a combustible gas environment. Debugging and maintenance must hold the corresponding qualifications and use a combustible gas detector to confirm that the concentration has reached a safe level before operation. The explosion-proof distribution box door should be able to close and lock normally, the switches inside the box should not be loose, and the wiring terminals should have no signs of oxidation or overheating discoloration. Before electrical work, be sure to disconnect the main power supply.
The grounding relationship of equipment, electrostatic discharge and leakage protection, is a key link in explosion-proof design. Regularly check whether the grounding wire is intact, whether the bolts are tightened, whether the secondary grounding meets the requirements, and regularly measure the grounding resistance. Anti static measures also include workers not wearing nail shoes and synthetic clothing that are prone to static electricity, and avoiding open flames and smoking in hazardous areas. Abnormal grounding may cause alarms or unstable operation of the device, which should be promptly resolved.
The power supply of the device should use a dedicated switch and should not share the circuit with ordinary loads. On site wiring shall be carried out in accordance with the phase sequence specifications. After the wiring is completed, the phase sequence shall be checked. In the power distribution process, it is necessary to verify that the incoming terminal is firmly crimped and that the cable specifications meet the current carrying requirements. After the device is powered on, there is a delayed start logic. After about ten seconds of power on, it automatically enters the operating mode. If the phase sequence protection lights up red, it indicates a phase sequence error and the equipment cannot operate. It is necessary to power off and adjust the phase line sequence before powering on again.
It is recommended to include the inspection of grounding, electrical box switches, wiring terminals, and pipeline interfaces in the monthly routine inspection, and record the inspection results and problems found during each inspection. Special protective measures should be used to maintain the explosion-proof surface of the explosion-proof box to avoid damage. Electrical faults that cannot be eliminated on site should be immediately shut down and the equipment supplier's after-sales service should be contacted to confirm complete elimination before resuming operation. By guarding these three checkpoints, the oil and gas recovery device can operate stably for a long time under the premise of safety.
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