Unexpected system downtime can severely hit your site’s output, but if you are operating heavy processing equipment, an electrical failure can bring the entire operation to a sudden halt. Keeping on top of your site’s electrical health is a daily challenge for plant managers dealing with abrasive dust, intense vibration, and outdoor elements.
If your processing line stops unexpectedly, an earth fault is often the culprit. So you don’t have to keep wondering, Process Control Services UK Ltd (PCS) lists the five common reasons why these faults occur in aggregates and quarry environments.
- Abrasive Dust Ingress in Terminal Enclosures
Quarry dust is very fine and abrasive in nature, and it stays there for a very long time. When quarry dust builds up within control panels and junction boxes, it becomes a bridge for electrical current.
Gradually, quarry dust attracts moisture, resulting in tracking on the terminal block, which leads to a short circuit to the protective earth. Conducting regular industrial electrical safety testing will help your maintenance personnel locate any hidden spots that contain quarry dust.
- Mechanical Loosening from Constant Vibration
The heavy-duty crushing machines, screens, and conveyor belts generate a consistent low-frequency vibration that acts like a mechanical lever on the electrical connections. Gradually, the vibration leads to terminal screws and high tensile bolts loosening.
If the connections are loose, high resistance and arcing are developed in the connections. This stress will eventually lead to breakdowns of insulation, resulting in an earth fault. Regular inspections of all the important connections should be carried out so as to maintain the integrity of the connections.
- Damaged Cable Insulation from Heavy Machinery
Quarry cables are constantly exposed to falling rocks, heavy vehicles running over containment paths, and sharp edges on metal chutes. When the outer jacket of a cable gets sliced or pinched, the inner conductors are exposed to the elements.
Once water or conductive dust enters the breach, the current finds a path to the earthed frame of the machinery. Thorough visual and physical inspections are necessary to identify worn cabling before a catastrophic failure occurs on site, saving time and money.
- Moisture Buildup in Outdoor Junction Boxes
Fluctuations in temperature during the day and night lead to the formation of condensation within the external enclosure. As a result of the presence of quarry dust, moisture creates an excellent pathway through which electricity can flow. This makes your system vulnerable.
In the case that the IP rating of the enclosure is affected due to age-related worn-out seals[1] [RN2] , water touches active terminals. Checking the continuity of such connections will help avoid interruptions in production processes or create serious safety issues in the factory.
- Insulation Breakdown from Equipment Overheating
The processing plants require large starting currents, which may damage the electrical wiring in the long run. In case there is excessive resistance or overload in a motor or control panel, the inner insulation breaks down.
Once the dielectric strength is compromised, the phase conductor can arc directly to the earthed casing of the equipment. Regular industrial electrical testing helps prevent unexpected breakdowns, keeps operators safe, and maintains the operational efficiency of heavy machinery.
Partner With PCS for Total Site Safety
Our team at Process Control Services UK Ltd (PCS) helps you avoid unnecessary production interruptions and costly downtime. We ensure your electrical infrastructure is robust enough to handle the harsh, heavy demands of the aggregates sector without creating liabilities.
Need to check your plant’s compliance or test your heavy machinery? Call us at 01298 79969 or email our technical team at mailto:sales@pcsukltd.co.uk to discuss your requirements or schedule a professional site audit today. We are here to help you optimise your operations.
