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Safeguarding process against cement dust ingress
February 2022

Connectwell fully enclosed CIMRE relay module design

Cement is the most ubiquitous material in human civilization. Yet, it is also one of the toughest production processes to manage. Beyond the sourcing of tonnes of aggregates and raw inputs, cement producers face production challenges in keeping their operations running.

A key process challenge is the downtime due to equipment damage caused by the very nature of working with cement. As virtually anyone who has worked with cement in any capacity knows, cement dust is all pervasive and reaches every surface and crevice of machinery. For the larger mechanical devices in a cement production process, this may not be much of a problem as the dust can be ignored or the effect may take a long time to manifest.

However, when it comes to the electronic heart of the automation process, cement dust can become a critical operations issue.

When one of India’s most reputed cement producers wanted to boost its cement production capacity, they needed a system integrator who could take on the Herculean task of creating a state-of-the-art process control for cement. The solution would require all the distributed controls, drives, motors, switchgear and instrumentation to have resilient connections with greater failover redundancy in a tough operational environment.

The Challenge

Expansion of new cement plant required processes, load and control to be perfectly in sync to produce the sheer compressive strength of cement that the manufacturer was reputed for. Our client, an expert in switchgear, controls and automation, faced a slew of challenges.

>  Connection of more than 700 digital input and output points to PLC.

>  Conventional relay board were too bulky and needed high depth panels

>  Extreme quantities of suspended cement dust in the operating environment was anticipated. As a result, conventional relay board connections were at critical risk of failure due to dust accumulation on open PCBs and the very high life-cycle costs.

>  The process used a high torque motor, governed through a relay board. This required a high current rating, with the need for a higher grade relay modules to operate continuously at 10 Amps. Conventional relay boards would risk overheating and have high catastrophic failure rates at this level of operation and vibration.

The Connectwell Solution

Working with the client and understanding the underlying operational usage requirements, Connectwell quickly realised that conventional connection solutions were not the answer.

With the number of connectivity points and consequent premium on available cabinet space, Connectwell recommended its next generation, compact Interface Relay Modules. This saved 35% more space inside the cabinet and allowed for a more compact cabinet.

To prevent cement dust from affecting the connections, fully enclosed CIMRE relay module was offered, which gave long life assurance.

Connectwell also guaranteed continuous 10 Amps load performance of the boards required for the high current motor loads and to ensure lower Total Cost of Ownership.

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A positive outcome
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Understanding the time-sensitive nature of the project and the critical operational features required to ensure safety and reliability, Connectwell CIMRE Relay Module offers concrete assurances.

The entire solution allowed for faster project time to completion and greater operational savings with respect to maintenance and continuous performance in a hazardous, high vibration environment.

For a more detailed view of this case study or to make a specific enquiry, click here.

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