34 n FOOD AND BEVERAGE March 2026 www.drivesncontrols.com In dairy operations, even a 1% loss of raw milk can cost more than £2.2m a year, not just in terms of the lost product, but also in potential animal welfare issues. Modern dairies rely heavily on automation for efficiency and consistency, yet when technology falters, resilience becomes critical. The ideal is to design dairy systems that rarely fail and to avoid downtime. Parlours should strive to be reliable and wellmaintained systems from the outset, with their automation configured and monitored to prevent faults wherever possible. However, even the most robust set-ups can encounter unexpected issues. When a failure does occur, a manual override becomes a crucial lifeline that allows operations to continue without compromising animal welfare, milk quality or regulatory compliance. Milking parlours depend on three-phase motors to power vacuum pumps, parlour automation and wash systems. Three-phase systems are now standard in modern dairies because they can handle the high power demands of multiple motors simultaneously and provide smoother, more reliable operation than single-phase alternatives. If a system fault or power surge causes these systems to stop, the impact is immediate: cows may not be milked on time, leading to udder discomfort and an increased risk of mastitis. Manual overrides give farmers the ability to restore operation quickly, even when automatic controllers have failed, ensuring animal welfare is not compromised. Once collected, milk needs to be cooled and agitated continuously to prevent bacterial growth. Any interruption in refrigeration or stirring can lead to spoilage, wasted output and a financial loss. In this scenario, manual override switches allow staff to bypass faulty automation and keep critical systems running until repairs are made. This immediate control is essential for maintaining food safety and protecting revenue. Many dairies operate in rural areas where grid reliability is not guaranteed. Blackouts or voltage fluctuations can take automated systems offline rapidly. Manual overrides allow operators to isolate faulty circuits, switch to backup generators or engage essential motors manually, maintaining productivity during power instabilities. This reduces the risk of costly downtime and safeguards herd management routines. Fault recovery Automated systems rely on sensors, timers and PLCs, all of which are vulnerable to outside factors including power supply variations and environmental factors. Without a manual override, even minor Any failure in an automated dairy can be costly and pose potential health risks to the cows. Andrew Ritchie, technical sales manager at dairy systems integrator Technidrive, explains why manual overrides in three-phase systems are therefore an essential safeguard. Manual overrides can protect three-phase systems in dairies
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