Harmony Freddies 9 Shaft
900kW 6.6kV Motor Starter Upgrade
Project Overview
Welkom Winder Services successfully completed the upgrade of 900kW 6.6kV High-Voltage Motor Starters at Harmony Freddies 9 Shaft, replacing ageing motor starter technology with a modern, high-performance motor control solution. The upgrade significantly improved the reliability, safety and operational efficiency of the high-voltage motor system while reducing mechanical stress during motor starting and stopping. Designed for demanding mining applications, the upgraded system provides smooth motor acceleration, enhanced equipment protection and improved long-term asset performance, ensuring dependable operation of critical mining infrastructure. The completed project modernised the electrical control system while maintaining full compliance with OEM engineering standards and industrial best practices.
Engineering Challenge
Ageing high-voltage motor starter technology required modernisation to improve reliability, safety and operational efficiency of 900kW pump motors
Solution Delivered
Replaced obsolete motor starter equipment with modern high-voltage motor control technology, including motor protection integration, protection relay configuration and high-voltage functional testing
Result
Significantly improved motor system reliability, reduced mechanical stress during starting and stopping, and ensured dependable operation of critical mining infrastructure
Scope of Services
What is a 900kW 6.6kV High-Voltage Motor Starter?
A 900kW 6.6kV High-Voltage Motor Starter is a specialised electrical control system used to safely start, control and protect large industrial motors operating in demanding mining environments. Traditional motor starting methods can place significant mechanical and electrical stress on motors, couplings and driven equipment. Modern high-voltage motor starter technology provides controlled acceleration and deceleration, reducing these stresses while improving operational reliability. Advanced motor starters incorporate intelligent protection features including thermal overload protection, phase-loss detection, overcurrent monitoring and fault diagnostics, ensuring critical equipment remains protected under all operating conditions. For pump applications, controlled starting also helps minimise hydraulic pressure surges (water hammer), reducing stress on pipelines and extending the life of the overall pumping system. The upgrade enhances operational efficiency, improves equipment lifespan and supports long-term asset management strategies within critical mining operations.
Engineering Gallery
System Benefits
Reduced Mechanical Stress
Controlled motor acceleration reduces stress on motors, couplings and drive systems.
Improved Equipment Protection
Advanced protection functions safeguard high-value electrical assets against overloads, phase failures and abnormal operating conditions.
Enhanced Operational Reliability
Modern motor control technology improves long-term system reliability and reduces unplanned downtime.
Water Hammer Reduction
Smooth motor starting minimises pressure surges within pumping systems, protecting pipelines and associated equipment.
Energy & Asset Management
Modern motor starter technology supports improved operational efficiency, intelligent monitoring and long-term asset management.
OEM-Compliant Engineering
Designed, installed and commissioned in accordance with recognised OEM and industrial engineering standards.
