Crusher station generator setup

When a mine wants to increase shift production or add a new crushing and screening line, it usually first purchases a crusher, screener, feeder, conveyor belt, water pump or air compressor. The operating power on the equipment nameplate seems controllable, but the impact on the power system is greater at the moment of startup.

If the existing generator sets, low-voltage cabinets, and cables on site were configured only for the old load, new equipment may cause a clear voltage drop as soon as it starts, trip protection, and even affect other motors on the same line.

The most difficult thing for the person in charge of expansion to accept is that the equipment has been installed and a single piece of equipment can be started, but once it enters the linkage startup, it becomes unstable. The crusher trips when it starts, the conveyor belt and feeder interact with each other, and the voltage is pulled down as soon as the pump or mill is turned on.

Onsite personnel could only repeatedly adjust the startup sequence, temporarily stop some loads, or have electricians guard the control cabinet. The production line is not completely without power, but cannot start stably and run continuously as planned.

If the startup shock is not dealt with, the expanded production capacity will be stuck in the power system. Crushing, screening, conveying and pumping stations cannot be stably linked, shift output cannot increase, and equipment installation and commissioning time will also be lengthened.

The harder problem is misdiagnosis. The site may blame the equipment, control cabinet, or operation, while the real cause is often a mismatch between generation margin, paralleling control, low-voltage distribution, and startup sequence.

First split the motor list into three categories: continuous operating load, starting impact load, and auxiliary load that allows delayed start. Crusher, screener, feeder, conveyor belt, pump and air compressor should record the starting mode, rated power, voltage frequency, interlocking relationship and actual starting sequence.

When selecting a set, focus on startup voltage drop and protection coordination: whether the capacity of a single generator set has enough margin, whether parallel operation should share the load, whether the low-voltage cabinet and cables can handle the impact, and which loads must be staggered. This lets the crushing line start according to the commissioned sequence instead of relying on repeated on-site trials.

Build the load table from the equipment list, marking direct-start, soft-start, and VFD-start equipment, plus conveying, feeding, and dust-removal loads that must run together with the crusher.

Model voltage drop against the actual startup sequence. If needed, start large motors in groups or use paralleling control to share the inrush across multiple gensets, while checking spare capacity in the LV cabinet, breakers, and cables.

Put the startup sequence into the commissioning checklist: which equipment starts first, the interval between starts, which alarms call for voltage and frequency checks, and when the line must be stopped and reset. A new shift can follow the same startup logic.

After completing the review, crushing, screening, conveying, pumping stations and auxiliary equipment have clear start-up queues, voltage fluctuations are suppressed within the acceptable range on site, and the unit will not repeatedly alarm or trip at the most difficult start-up moment.

When adding feeders, conveyor belts or pumping stations later, it can also be seen on site whether the bottleneck is capacity, parallel control, low-voltage cabinets or startup sequence. There is no need to rely on trial runs to find problems every time the production is expanded.