Auto Transfer Switch (ATS)

• Installation
• Maintenance and Testing



Our standard ATS service includes:

• Arc chute inspection and clean
• Auxiliary contact inspection, clean and tighten (if fitted)
• Contact resistance test
• Contact temperature test
• Contact inspection, clean and tighten
• Contact adjustment (if required)
• Current transformer functionality test (if fitted)
• Earth contact inspection, clean and tighten
• Electrical wiring inspection and connection check
• Functionality test of switch changeover
• Functionality test of undervoltage coils (if fitted)
• General clean
• Insulation inspection and clean
• Insulation resistance test
• Lubrication of mechanism, linkages and springs
• Manual operational test
• Mechanical inspection, clean and tighten
• Mechanical interlock inspection, tighten and test (if fitted)
• Protection relay test including trip time test (if fitted)
• Test report with recommendations


• Repair
• Retrofit



Our experienced technicians service and test various makes of ATS including:

• Ghisalba
• Merlin Gerin
• Mitsubishi
• Telemecanique
• Terasaki
• Togami